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Built 2026-10-19 (19 October 2026)

Rock Mills Weather Records (USC00017025)

Record envelope, standing records and threshold days for Rock Mills (USC00017025), Alabama, United States, with 89 years of record.

Key Facts for Rock Mills

  • Rock Mills (USC00017025) is a weather station in Alabama, United States at 33.16 latitude and -85.29 longitude, 230 m (755 ft) above sea level.
  • The station reports from 1938 to 2026, 89 years of record.
  • 1,464 records set at Rock Mills still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Rock Mills set a monthly record high minimum temperature of 25.0 C (77.0 F) on 29 July 2026.

About the Station

  • Location: Alabama, United States, 33.16 latitude, -85.29 longitude.
  • Elevation: 230 m (755 ft).
  • Period of record: 1938 to 2026, 89 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

10 days at or beyond a record
Daily record high and record low at Rock Mills, with 2026 drawn through them The band shows the record high and record low for each calendar day at Rock Mills. The lines show the 2026 daily maximum and minimum. 10 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -200204060 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Rock Mills. The lines show the 2026 daily maximum and minimum. 10 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Rock Mills, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan28.3 C (82.9 F)-17.8 C (0.0 F)22.8 C (73.0 F)-11.7 C (10.9 F)
Feb28.3 C (82.9 F)-14.4 C (6.1 F)26.7 C (80.1 F)-9.4 C (15.1 F)
Mar31.1 C (88.0 F)-11.7 C (10.9 F)29.4 C (84.9 F)-3.9 C (25.0 F)
Apr33.3 C (91.9 F)-4.4 C (24.1 F)31.1 C (88.0 F)-0.6 C (30.9 F)
May36.7 C (98.1 F)-0.6 C (30.9 F)32.2 C (90.0 F)3.3 C (37.9 F)
Jun40.6 C (105.1 F)5.6 C (42.1 F)32.8 C (91.0 F)19.4 C (66.9 F)
Jul41.7 C (107.1 F)10.6 C (51.1 F)35.0 C (95.0 F)16.7 C (62.1 F)
Aug40.0 C (104.0 F)8.3 C (46.9 F)n/an/a
Sep37.8 C (100.0 F)0.0 C (32.0 F)36.1 C (97.0 F)18.9 C (66.0 F)
Oct37.2 C (99.0 F)-6.1 C (21.0 F)n/an/a
Nov30.0 C (86.0 F)-14.4 C (6.1 F)n/an/a
Dec26.7 C (80.1 F)-18.3 C (-0.9 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Rock Mills by the year they were set 1,464 records at Rock Mills still stand. 2000 holds the most, with 47. 02040601941: 101942: 191943: 351944: 131945: 211946: 211947: 241948: 261949: 281950: 381951: 301952: 291953: 211954: 411955: 211956: 191957: 221958: 171959: 131960: 151961: 221962: 271963: 211964: 211965: 191966: 221967: 421968: 241969: 141970: 261971: 281972: 221973: 181974: 231975: 131976: 161977: 251978: 171979: 181980: 61982: 141983: 231984: 121985: 121986: 21987: 81988: 71989: 321990: 131991: 241992: 151999: 42000: 472001: 182002: 132003: 122004: 92005: 212006: 202007: 242008: 62009: 122010: 152011: 112012: 132013: 172014: 82015: 132016: 62017: 232018: 92019: 122020: 132021: 142022: 192023: 182024: 142025: 132026: 111941194919571965197319821990200420122020
1,464 records at Rock Mills still stand. 2000 holds the most, with 47.
Standing records at Rock Mills by the year they were set
Year setStanding records
194110
194219
194335
194413
194521
194621
194724
194826
194928
195038
195130
195229
195321
195441
195521
195619
195722
195817
195913
196015
196122
196227
196321
196421
196519
196622
196742
196824
196914
197026
197128
197222
197318
197423
197513
197616
197725
197817
197918
19806
198214
198323
198412
198512
19862
19878
19887
198932
199013
199124
199215
19994
200047
200118
200213
200312
20049
200521
200620
200724
20086
200912
201015
201111
201213
201317
20148
201513
20166
201723
20189
201912
202013
202114
202219
202318
202414
202513
202611

All-Time Record Progression

1 new records
When Rock Mills set new all-time records 1 all-time records were set at Rock Mills between 23 March 1983 and 23 March 1983. Each dot is a new record. Record daily snowfall23 March 1983: Record daily snowfall 15.2 cm (6.0 in)
1 all-time records were set at Rock Mills between 23 March 1983 and 23 March 1983. Each dot is a new record.
When Rock Mills set new all-time records
DateKindDetail
1983-03-23Record daily snowfallRecord daily snowfall 15.2 cm (6.0 in)

Wettest Day of Each Month

Feb: 178.8 mm (7.0 in)
Record daily precipitation for each month at Rock Mills The wettest day on record for each calendar month at Rock Mills. The most was 178.8 mm (7.0 in) on 25 February 1961. 050100150200 Jan: 107.4 mm (4.2 in), 11 January 1972 Jan Feb: 178.8 mm (7.0 in), 25 February 1961 Feb Mar: 135.1 mm (5.3 in), 16 March 1990 Mar Apr: 115.6 mm (4.6 in), 25 April 1945 Apr May: 160.0 mm (6.3 in), 7 May 2003 May Jun: 147.1 mm (5.8 in), 17 June 1999 Jun Jul: 124.7 mm (4.9 in), 7 July 2005 Jul Aug: 105.7 mm (4.2 in), 11 August 2017 Aug Sep: 127.0 mm (5.0 in), 13 September 2006 Sep Oct: 120.7 mm (4.8 in), 1 October 1965 Oct Nov: 119.1 mm (4.7 in), 27 November 1948 Nov Dec: 107.7 mm (4.2 in), 21 December 1972 Dec
The wettest day on record for each calendar month at Rock Mills. The most was 178.8 mm (7.0 in) on 25 February 1961.
Record daily precipitation for each month at Rock Mills
MonthRecord daily precipitation (mm)Date
Jan107.4 mm (4.2 in)11 January 1972
Feb178.8 mm (7.0 in)25 February 1961
Mar135.1 mm (5.3 in)16 March 1990
Apr115.6 mm (4.6 in)25 April 1945
May160.0 mm (6.3 in)7 May 2003
Jun147.1 mm (5.8 in)17 June 1999
Jul124.7 mm (4.9 in)7 July 2005
Aug105.7 mm (4.2 in)11 August 2017
Sep127.0 mm (5.0 in)13 September 2006
Oct120.7 mm (4.8 in)1 October 1965
Nov119.1 mm (4.7 in)27 November 1948
Dec107.7 mm (4.2 in)21 December 1972

Period of Record Coverage

1941 to 2026
Days with data per year at Rock Mills 80 years of record at Rock Mills, 1941 to 2026. 26 years have data for under 90 percent of days and are left out of rankings: 1941, 1944, 1974, 1976, 1980, 1982, 1984, 1985 and others. 1941: 56 of 365 days1942: 329 of 365 days1943: 365 of 365 days1944: 246 of 366 days1945: 364 of 365 days1946: 365 of 365 days1947: 362 of 365 days1948: 365 of 366 days1949: 364 of 365 days1950: 365 of 365 days1951: 332 of 365 days1952: 334 of 366 days1953: 364 of 365 days1954: 361 of 365 days1955: 364 of 365 days1956: 361 of 366 days1957: 365 of 365 days1958: 365 of 365 days1959: 365 of 365 days1960: 358 of 366 days1961: 361 of 365 days1962: 354 of 365 days1963: 343 of 365 days1964: 365 of 366 days1965: 365 of 365 days1966: 365 of 365 days1967: 361 of 365 days1968: 358 of 366 days1969: 345 of 365 days1970: 364 of 365 days1971: 361 of 365 days1972: 366 of 366 days1973: 360 of 365 days1974: 289 of 365 days1975: 361 of 365 days1976: 296 of 366 days1977: 347 of 365 days1978: 365 of 365 days1979: 364 of 365 days1980: 152 of 366 days1982: 304 of 365 days1983: 334 of 365 days1984: 182 of 366 days1985: 181 of 365 days1986: 53 of 365 days1987: 146 of 365 days1988: 192 of 366 days1989: 339 of 365 days1990: 326 of 365 days1991: 339 of 365 days1992: 315 of 366 days1993: 16 of 365 days1999: 92 of 365 days2000: 354 of 366 days2001: 350 of 365 days2002: 347 of 365 days2003: 360 of 365 days2004: 206 of 366 days2005: 363 of 365 days2006: 350 of 365 days2007: 308 of 365 days2008: 145 of 366 days2009: 303 of 365 days2010: 363 of 365 days2011: 363 of 365 days2012: 362 of 366 days2013: 340 of 365 days2014: 197 of 365 days2015: 313 of 365 days2016: 358 of 366 days2017: 346 of 365 days2018: 343 of 365 days2019: 283 of 365 days2020: 283 of 366 days2021: 312 of 365 days2022: 350 of 365 days2023: 365 of 365 days2024: 313 of 366 days2025: 365 of 365 days2026: 191 of 365 days19501960197019801990200020102020
80 years of record at Rock Mills, 1941 to 2026. 26 years have data for under 90 percent of days and are left out of rankings: 1941, 1944, 1974, 1976, 1980, 1982, 1984, 1985 and others.
Days with data per year at Rock Mills
YearDays with dataShare of yearComplete
19415615%No
194232990%Yes
1943365100%Yes
194424667%No
1945364100%Yes
1946365100%Yes
194736299%Yes
1948365100%Yes
1949364100%Yes
1950365100%Yes
195133291%Yes
195233491%Yes
1953364100%Yes
195436199%Yes
1955364100%Yes
195636199%Yes
1957365100%Yes
1958365100%Yes
1959365100%Yes
196035898%Yes
196136199%Yes
196235497%Yes
196334394%Yes
1964365100%Yes
1965365100%Yes
1966365100%Yes
196736199%Yes
196835898%Yes
196934595%Yes
1970364100%Yes
197136199%Yes
1972366100%Yes
197336099%Yes
197428979%No
197536199%Yes
197629681%No
197734795%Yes
1978365100%Yes
1979364100%Yes
198015242%No
198230483%No
198333492%Yes
198418250%No
198518150%No
19865315%No
198714640%No
198819252%No
198933993%Yes
199032689%No
199133993%Yes
199231586%No
1993164%No
19999225%No
200035497%Yes
200135096%Yes
200234795%Yes
200336099%Yes
200420656%No
200536399%Yes
200635096%Yes
200730884%No
200814540%No
200930383%No
201036399%Yes
201136399%Yes
201236299%Yes
201334093%Yes
201419754%No
201531386%No
201635898%Yes
201734695%Yes
201834394%Yes
201928378%No
202028377%No
202131285%No
202235096%Yes
2023365100%Yes
202431386%No
2025365100%Yes
202619152%No

Latest Records

20
Latest records at Rock Mills
DateStationRecordValueBeat old record byOld record stoodSignificance
29 July 2026Rock Mills, USmonthly high min25.0 C (77.0 F)0.6 C (1.1 F)15 years24 of 100 (Routine)
27 July 2026Rock Mills, USdaily high min (Tie)22.8 C (73.0 F)tie53 years6 of 100 (Routine)
25 July 2026Rock Mills, USdaily high min22.8 C (73.0 F)0.6 C (1.1 F)52 years25 of 100 (Routine)
31 May 2026Rock Mills, USdaily high min (Tie)20.0 C (68.0 F)tie67 years7 of 100 (Routine)
30 May 2026Rock Mills, USdaily high min (Tie)20.6 C (69.1 F)tie67 years7 of 100 (Routine)
26 May 2026Rock Mills, USdaily high min (Tie)20.6 C (69.1 F)tie20 years3 of 100 (Routine)
23 May 2026Rock Mills, USdaily high min (Tie)20.6 C (69.1 F)tie76 years7 of 100 (Routine)
15 May 2026Rock Mills, USdaily low min (Tie)4.4 C (39.9 F)tie55 years6 of 100 (Routine)
7 May 2026Rock Mills, USdaily high min18.9 C (66.0 F)1.1 C (2.0 F)69 years30 of 100 (Routine)
2 May 2026Rock Mills, USdaily low max20.6 C (69.1 F)0.5 C (0.9 F)20 years15 of 100 (Routine)
4 April 2026Rock Mills, USdaily high min (Tie)16.7 C (62.1 F)tie76 years7 of 100 (Routine)
22 March 2026Rock Mills, USdaily high max28.3 C (82.9 F)1.1 C (2.0 F)8 years12 of 100 (Routine)
11 March 2026Rock Mills, USdaily high max28.3 C (82.9 F)0.5 C (0.9 F)71 years29 of 100 (Routine)
10 March 2026Rock Mills, USdaily high min (Tie)15.0 C (59.0 F)tie52 years5 of 100 (Routine)
10 March 2026Rock Mills, USdaily high max (Tie)27.8 C (82.0 F)tie33 years4 of 100 (Routine)
8 March 2026Rock Mills, USdaily high min15.6 C (60.1 F)0.6 C (1.1 F)52 years24 of 100 (Routine)
7 March 2026Rock Mills, USdaily high max28.9 C (84.0 F)1.1 C (2.0 F)69 years30 of 100 (Routine)
6 March 2026Rock Mills, USdaily high max (Tie)27.8 C (82.0 F)tie3 years2 of 100 (Routine)
21 February 2026Rock Mills, USdaily high min (Tie)12.2 C (54.0 F)tie71 years7 of 100 (Routine)
20 February 2026Rock Mills, USdaily high max26.1 C (79.0 F)2.2 C (4.0 F)75 years33 of 100 (Routine)

Climate Trend

47 complete years, 1943 to 2025
Annual mean temperature at Rock Mills as warming stripes, 1943 to 2025 One stripe for each of 47 complete years at Rock Mills, 1943 to 2025. Blue stripes are years cooler than the station's own mean of 16.6 C (61.9 F); red stripes are warmer. The coolest year was 1968, at 15.0 C (58.9 F), and the warmest was 2023, at 18.0 C (64.5 F). The strongest colour marks a difference of 1.7 C (3.1 F). 1943: 16.9 C, +0.3 C from the station mean1945: 17.4 C, +0.8 C from the station mean1946: 17.6 C, +1.0 C from the station mean1947: 16.9 C, +0.3 C from the station mean1948: 17.5 C, +0.9 C from the station mean1949: 17.5 C, +0.9 C from the station mean1950: 17.2 C, +0.6 C from the station mean1953: 17.2 C, +0.6 C from the station mean1954: 17.2 C, +0.6 C from the station mean1955: 16.9 C, +0.3 C from the station mean1956: 17.2 C, +0.6 C from the station mean1957: 17.4 C, +0.8 C from the station mean1958: 15.9 C, -0.7 C from the station mean1959: 16.8 C, +0.2 C from the station mean1961: 16.2 C, -0.4 C from the station mean1962: 16.9 C, +0.3 C from the station mean1963: 15.6 C, -1.0 C from the station mean1964: 15.5 C, -1.1 C from the station mean1965: 15.9 C, -0.7 C from the station mean1966: 15.3 C, -1.3 C from the station mean1967: 15.3 C, -1.3 C from the station mean1968: 15.0 C, -1.6 C from the station mean1969: 15.3 C, -1.3 C from the station mean1970: 15.8 C, -0.8 C from the station mean1971: 16.2 C, -0.4 C from the station mean1972: 16.3 C, -0.3 C from the station mean1973: 16.5 C, -0.1 C from the station mean1975: 16.7 C, +0.1 C from the station mean1978: 16.0 C, -0.6 C from the station mean1979: 15.6 C, -1.0 C from the station mean1990: 17.5 C, +0.9 C from the station mean1991: 16.6 C, 0.0 C from the station mean2000: 15.5 C, -1.1 C from the station mean2001: 16.4 C, -0.2 C from the station mean2003: 15.7 C, -0.9 C from the station mean2005: 16.6 C, 0.0 C from the station mean2006: 17.2 C, +0.6 C from the station mean2010: 15.8 C, -0.8 C from the station mean2011: 16.7 C, +0.1 C from the station mean2012: 17.4 C, +0.8 C from the station mean2013: 16.3 C, -0.3 C from the station mean2016: 17.4 C, +0.8 C from the station mean2017: 17.3 C, +0.7 C from the station mean2021: 17.0 C, +0.4 C from the station mean2022: 17.1 C, +0.5 C from the station mean2023: 18.0 C, +1.4 C from the station mean2025: 17.4 C, +0.8 C from the station mean194319501960197019801990200020102020
One stripe for each of 47 complete years at Rock Mills, 1943 to 2025. Blue stripes are years cooler than the station's own mean of 16.6 C (61.9 F); red stripes are warmer. The coolest year was 1968, at 15.0 C (58.9 F), and the warmest was 2023, at 18.0 C (64.5 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at Rock Mills as warming stripes, 1943 to 2025
YearAnnual mean temperatureDifference from the station mean
194316.9 C+0.30 C
194517.4 C+0.82 C
194617.6 C+1.00 C
194716.9 C+0.27 C
194817.5 C+0.94 C
194917.5 C+0.95 C
195017.2 C+0.62 C
195317.2 C+0.63 C
195417.2 C+0.65 C
195516.9 C+0.33 C
195617.2 C+0.62 C
195717.4 C+0.83 C
195815.9 C-0.65 C
195916.8 C+0.24 C
196116.2 C-0.40 C
196216.9 C+0.31 C
196315.6 C-1.02 C
196415.5 C-1.09 C
196515.9 C-0.74 C
196615.3 C-1.26 C
196715.3 C-1.34 C
196815.0 C-1.63 C
196915.3 C-1.27 C
197015.8 C-0.76 C
197116.2 C-0.41 C
197216.3 C-0.34 C
197316.5 C-0.06 C
197516.7 C+0.12 C
197816.0 C-0.62 C
197915.6 C-0.95 C
199017.5 C+0.86 C
199116.6 C+0.02 C
200015.5 C-1.08 C
200116.4 C-0.21 C
200315.7 C-0.89 C
200516.6 C0.00 C
200617.2 C+0.64 C
201015.8 C-0.76 C
201116.7 C+0.15 C
201217.4 C+0.81 C
201316.3 C-0.27 C
201617.4 C+0.85 C
201717.3 C+0.73 C
202117.0 C+0.44 C
202217.1 C+0.47 C
202318.0 C+1.45 C
202517.4 C+0.82 C

The fitted trend in annual mean temperature here over 1943 to 2025 is 0.03 C (-0.06 to 0.12) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.05 F (-0.12 to 0.21) per decade. The slope is a straight line fitted to 47 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Rock Mills
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.03 C (-0.06 to 0.12) per decade0.05 F (-0.12 to 0.21) per decade1943 to 202547Not clearly different from zero
Mean daily maximum0.01 C (-0.08 to 0.10) per decade0.01 F (-0.15 to 0.17) per decade1943 to 202547Not clearly different from zero
Mean daily minimum0.04 C (-0.08 to 0.17) per decade0.1 F (-0.2 to 0.3) per decade1943 to 202547Not clearly different from zero

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1938 to 2026
Yearly extremes at Rock Mills: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)41.7 C (107.1 F)195237.2 C (99.0 F)80
Coldest night (TNn)-18.3 C (-0.9 F)1962-11.4 C (11.5 F)80
Wettest day (Rx1day)178.8 mm (7.0 in)196177.0 mm (3.0 in)83
Wettest five days (Rx5day)269.0 mm (10.6 in)1961121.4 mm (4.8 in)82
Longest dry spell (CDD)46 days202421 days82

Hottest day (TXx)

Hottest day (TXx) at Rock Mills by year The hottest day of the year at Rock Mills, 1938 to 2026. The record is 41.7 C (107.1 F) in 1952, marked on the chart; the median year is 37.2 C (99.0 F). 2030405019401960198020002020Record: 41.7 C (107.1 F) in 1952
The hottest day of the year at Rock Mills, 1938 to 2026. The record is 41.7 C (107.1 F) in 1952, marked on the chart; the median year is 37.2 C (99.0 F).
Hottest day (TXx) at Rock Mills by year
YearHottest day (TXx)
1938n/a
1939n/a
1940n/a
194135.0 C (95.0 F)
194238.9 C (102.0 F)
194338.9 C (102.0 F)
194438.3 C (100.9 F)
194537.8 C (100.0 F)
194636.1 C (97.0 F)
194740.0 C (104.0 F)
194840.0 C (104.0 F)
194937.8 C (100.0 F)
195036.7 C (98.1 F)
195137.8 C (100.0 F)
195241.7 C (107.1 F)
195337.2 C (99.0 F)
195439.4 C (102.9 F)
195536.7 C (98.1 F)
195638.9 C (102.0 F)
195737.2 C (99.0 F)
195836.7 C (98.1 F)
195938.3 C (100.9 F)
196038.3 C (100.9 F)
196136.1 C (97.0 F)
196238.3 C (100.9 F)
196337.2 C (99.0 F)
196438.9 C (102.0 F)
196535.6 C (96.1 F)
196638.9 C (102.0 F)
196735.0 C (95.0 F)
196838.9 C (102.0 F)
196938.9 C (102.0 F)
197039.4 C (102.9 F)
197137.8 C (100.0 F)
197236.7 C (98.1 F)
197335.6 C (96.1 F)
197435.6 C (96.1 F)
197536.7 C (98.1 F)
197636.7 C (98.1 F)
197740.6 C (105.1 F)
197838.3 C (100.9 F)
197937.2 C (99.0 F)
198032.8 C (91.0 F)
198235.6 C (96.1 F)
198339.4 C (102.9 F)
198435.6 C (96.1 F)
198535.6 C (96.1 F)
198628.9 C (84.0 F)
198738.3 C (100.9 F)
198838.3 C (100.9 F)
198936.1 C (97.0 F)
199038.9 C (102.0 F)
199138.3 C (100.9 F)
199236.7 C (98.1 F)
199321.1 C (70.0 F)
199931.7 C (89.1 F)
200040.0 C (104.0 F)
200135.0 C (95.0 F)
200237.8 C (100.0 F)
200336.7 C (98.1 F)
200434.4 C (93.9 F)
200536.1 C (97.0 F)
200638.3 C (100.9 F)
200739.4 C (102.9 F)
200836.1 C (97.0 F)
200935.0 C (95.0 F)
201037.2 C (99.0 F)
201137.8 C (100.0 F)
201240.6 C (105.1 F)
201333.3 C (91.9 F)
201430.6 C (87.1 F)
201535.6 C (96.1 F)
201637.2 C (99.0 F)
201734.4 C (93.9 F)
201833.9 C (93.0 F)
201936.7 C (98.1 F)
202034.4 C (93.9 F)
202134.4 C (93.9 F)
202236.7 C (98.1 F)
202337.2 C (99.0 F)
202437.8 C (100.0 F)
202536.1 C (97.0 F)
202636.1 C (97.0 F)

Coldest night (TNn)

Coldest night (TNn) at Rock Mills by year The coldest night of the year at Rock Mills, 1938 to 2026. The record is -18.3 C (-0.9 F) in 1962, marked on the chart; the median year is -11.4 C (11.5 F). -20-15-10-519401960198020002020Record: -18.3 C (-0.9 F) in 1962
The coldest night of the year at Rock Mills, 1938 to 2026. The record is -18.3 C (-0.9 F) in 1962, marked on the chart; the median year is -11.4 C (11.5 F).
Coldest night (TNn) at Rock Mills by year
YearColdest night (TNn)
1938n/a
1939n/a
1940n/a
1941-6.7 C (19.9 F)
1942-15.0 C (5.0 F)
1943-11.7 C (10.9 F)
1944-9.4 C (15.1 F)
1945-10.0 C (14.0 F)
1946-8.3 C (17.1 F)
1947-10.0 C (14.0 F)
1948-12.8 C (9.0 F)
1949-6.7 C (19.9 F)
1950-14.4 C (6.1 F)
1951-13.9 C (7.0 F)
1952-8.9 C (16.0 F)
1953-11.1 C (12.0 F)
1954-8.3 C (17.1 F)
1955-10.6 C (12.9 F)
1956-8.9 C (16.0 F)
1957-11.7 C (10.9 F)
1958-13.9 C (7.0 F)
1959-12.2 C (10.0 F)
1960-11.1 C (12.0 F)
1961-13.9 C (7.0 F)
1962-18.3 C (-0.9 F)
1963-17.8 C (0.0 F)
1964-14.4 C (6.1 F)
1965-11.1 C (12.0 F)
1966-17.8 C (0.0 F)
1967-11.7 C (10.9 F)
1968-11.7 C (10.9 F)
1969-12.2 C (10.0 F)
1970-16.1 C (3.0 F)
1971-12.2 C (10.0 F)
1972-13.3 C (8.1 F)
1973-10.6 C (12.9 F)
1974-8.3 C (17.1 F)
1975-9.4 C (15.1 F)
1976-12.8 C (9.0 F)
1977-15.6 C (3.9 F)
1978-10.6 C (12.9 F)
1979-12.2 C (10.0 F)
1980-10.6 C (12.9 F)
1982-7.2 C (19.0 F)
1983-16.7 C (1.9 F)
1984-12.2 C (10.0 F)
1985-15.0 C (5.0 F)
1986-6.1 C (21.0 F)
1987-10.0 C (14.0 F)
1988-9.4 C (15.1 F)
1989-13.9 C (7.0 F)
1990-6.1 C (21.0 F)
1991-11.1 C (12.0 F)
1992-11.1 C (12.0 F)
1993-7.8 C (18.0 F)
1999-9.4 C (15.1 F)
2000-14.4 C (6.1 F)
2001-15.6 C (3.9 F)
2002-10.6 C (12.9 F)
2003-15.0 C (5.0 F)
2004-12.2 C (10.0 F)
2005-11.1 C (12.0 F)
2006-11.7 C (10.9 F)
2007-9.4 C (15.1 F)
2008-10.6 C (12.9 F)
2009-6.7 C (19.9 F)
2010-12.2 C (10.0 F)
2011-11.7 C (10.9 F)
2012-9.4 C (15.1 F)
2013-7.8 C (18.0 F)
2014-17.2 C (1.0 F)
2015-13.3 C (8.1 F)
2016-9.4 C (15.1 F)
2017-10.0 C (14.0 F)
2018-12.8 C (9.0 F)
2019-7.2 C (19.0 F)
2020-8.3 C (17.1 F)
2021-6.1 C (21.0 F)
2022-14.4 C (6.1 F)
2023-7.8 C (18.0 F)
2024-12.8 C (9.0 F)
2025-11.7 C (10.9 F)
2026-11.7 C (10.9 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Rock Mills by year The wettest day of the year at Rock Mills, 1938 to 2026. The record is 178.8 mm (7.0 in) in 1961, marked on the chart; the median year is 77.0 mm (3.0 in). 05010015020019401960198020002020Record: 178.8 mm (7.0 in) in 1961
The wettest day of the year at Rock Mills, 1938 to 2026. The record is 178.8 mm (7.0 in) in 1961, marked on the chart; the median year is 77.0 mm (3.0 in).
Wettest day (Rx1day) at Rock Mills by year
YearWettest day (Rx1day)
193870.4 mm (2.8 in)
1939110.0 mm (4.3 in)
194061.2 mm (2.4 in)
194176.2 mm (3.0 in)
194283.8 mm (3.3 in)
194392.7 mm (3.6 in)
194465.3 mm (2.6 in)
1945115.6 mm (4.6 in)
194661.2 mm (2.4 in)
194774.9 mm (2.9 in)
1948119.1 mm (4.7 in)
194974.7 mm (2.9 in)
195053.6 mm (2.1 in)
195159.9 mm (2.4 in)
195287.1 mm (3.4 in)
195378.7 mm (3.1 in)
195453.8 mm (2.1 in)
195566.0 mm (2.6 in)
1956111.8 mm (4.4 in)
195798.3 mm (3.9 in)
195878.2 mm (3.1 in)
195976.5 mm (3.0 in)
196096.5 mm (3.8 in)
1961178.8 mm (7.0 in)
196295.5 mm (3.8 in)
196364.8 mm (2.6 in)
196485.6 mm (3.4 in)
1965120.7 mm (4.8 in)
196691.9 mm (3.6 in)
196771.6 mm (2.8 in)
196894.2 mm (3.7 in)
196999.1 mm (3.9 in)
197077.2 mm (3.0 in)
197178.7 mm (3.1 in)
1972107.7 mm (4.2 in)
197369.9 mm (2.8 in)
197458.9 mm (2.3 in)
197583.6 mm (3.3 in)
197691.9 mm (3.6 in)
197781.3 mm (3.2 in)
197858.4 mm (2.3 in)
197976.2 mm (3.0 in)
198067.6 mm (2.7 in)
198281.3 mm (3.2 in)
198375.7 mm (3.0 in)
198437.8 mm (1.5 in)
198542.9 mm (1.7 in)
198650.0 mm (2.0 in)
198754.1 mm (2.1 in)
1988122.7 mm (4.8 in)
198990.2 mm (3.6 in)
1990135.1 mm (5.3 in)
199189.7 mm (3.5 in)
199296.3 mm (3.8 in)
199322.9 mm (0.9 in)
1999147.1 mm (5.8 in)
200077.0 mm (3.0 in)
200190.7 mm (3.6 in)
200262.5 mm (2.5 in)
2003160.0 mm (6.3 in)
200453.3 mm (2.1 in)
2005124.7 mm (4.9 in)
2006127.0 mm (5.0 in)
200744.5 mm (1.8 in)
200838.9 mm (1.5 in)
200997.8 mm (3.9 in)
2010102.1 mm (4.0 in)
201169.1 mm (2.7 in)
201261.2 mm (2.4 in)
201380.0 mm (3.1 in)
201476.2 mm (3.0 in)
201555.9 mm (2.2 in)
201673.7 mm (2.9 in)
2017105.7 mm (4.2 in)
201883.8 mm (3.3 in)
201971.6 mm (2.8 in)
202072.9 mm (2.9 in)
202167.8 mm (2.7 in)
202263.5 mm (2.5 in)
202363.5 mm (2.5 in)
202493.2 mm (3.7 in)
202576.2 mm (3.0 in)
202651.3 mm (2.0 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Rock Mills by year The wettest five days of the year at Rock Mills, 1938 to 2026. The record is 269.0 mm (10.6 in) in 1961, marked on the chart; the median year is 121.4 mm (4.8 in). 5010015020025030019401960198020002020Record: 269.0 mm (10.6 in) in 1961
The wettest five days of the year at Rock Mills, 1938 to 2026. The record is 269.0 mm (10.6 in) in 1961, marked on the chart; the median year is 121.4 mm (4.8 in).
Wettest five days (Rx5day) at Rock Mills by year
YearWettest five days (Rx5day)
193897.1 mm (3.8 in)
1939139.2 mm (5.5 in)
1940135.3 mm (5.3 in)
1941114.3 mm (4.5 in)
1942118.7 mm (4.7 in)
1943142.7 mm (5.6 in)
1944132.9 mm (5.2 in)
1945172.8 mm (6.8 in)
194698.7 mm (3.9 in)
1947157.5 mm (6.2 in)
1948220.7 mm (8.7 in)
1949165.9 mm (6.5 in)
195086.1 mm (3.4 in)
1951120.6 mm (4.7 in)
1952126.7 mm (5.0 in)
1953164.7 mm (6.5 in)
195493.4 mm (3.7 in)
1955108.9 mm (4.3 in)
1956152.9 mm (6.0 in)
1957138.7 mm (5.5 in)
195888.1 mm (3.5 in)
195983.5 mm (3.3 in)
1960121.9 mm (4.8 in)
1961269.0 mm (10.6 in)
1962142.5 mm (5.6 in)
1963100.6 mm (4.0 in)
1964156.3 mm (6.2 in)
1965134.1 mm (5.3 in)
1966149.3 mm (5.9 in)
1967115.3 mm (4.5 in)
196899.1 mm (3.9 in)
1969147.1 mm (5.8 in)
1970118.3 mm (4.7 in)
1971165.8 mm (6.5 in)
1972166.3 mm (6.5 in)
1973110.3 mm (4.3 in)
197485.8 mm (3.4 in)
1975132.4 mm (5.2 in)
1976151.9 mm (6.0 in)
1977100.0 mm (3.9 in)
1978102.1 mm (4.0 in)
1979129.6 mm (5.1 in)
1980120.9 mm (4.8 in)
1982106.7 mm (4.2 in)
1983130.0 mm (5.1 in)
198474.9 mm (2.9 in)
198586.1 mm (3.4 in)
1986103.4 mm (4.1 in)
198790.4 mm (3.6 in)
1988162.3 mm (6.4 in)
1989149.7 mm (5.9 in)
1990200.4 mm (7.9 in)
1991141.8 mm (5.6 in)
1992115.3 mm (4.5 in)
1993n/a
1999208.3 mm (8.2 in)
200096.0 mm (3.8 in)
2001131.4 mm (5.2 in)
200286.8 mm (3.4 in)
200378.7 mm (3.1 in)
200483.2 mm (3.3 in)
2005183.2 mm (7.2 in)
2006130.6 mm (5.1 in)
200781.8 mm (3.2 in)
200881.8 mm (3.2 in)
2009109.5 mm (4.3 in)
2010133.9 mm (5.3 in)
2011120.1 mm (4.7 in)
201283.6 mm (3.3 in)
2013154.4 mm (6.1 in)
201482.8 mm (3.3 in)
2015135.1 mm (5.3 in)
2016106.5 mm (4.2 in)
2017150.1 mm (5.9 in)
2018144.9 mm (5.7 in)
2019116.6 mm (4.6 in)
2020144.3 mm (5.7 in)
202186.4 mm (3.4 in)
202290.9 mm (3.6 in)
2023101.6 mm (4.0 in)
2024174.7 mm (6.9 in)
2025132.3 mm (5.2 in)
202675.0 mm (3.0 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Rock Mills by year The longest dry spell of the year at Rock Mills, 1938 to 2026. The record is 46 days in 2024, marked on the chart; the median year is 21 days. 0102030405019401960198020002020Record: 46 days in 2024
The longest dry spell of the year at Rock Mills, 1938 to 2026. The record is 46 days in 2024, marked on the chart; the median year is 21 days.
Longest dry spell (CDD) at Rock Mills by year
YearLongest dry spell (CDD)
193821 days
193934 days
194042 days
194121 days
194221 days
194323 days
194423 days
194512 days
194624 days
194720 days
194821 days
194928 days
195026 days
195125 days
195230 days
195329 days
195420 days
195523 days
195618 days
195719 days
195827 days
195920 days
196020 days
196130 days
196217 days
196333 days
196434 days
196516 days
196622 days
196718 days
196822 days
196918 days
197021 days
197123 days
197223 days
197327 days
197419 days
197519 days
197613 days
197716 days
197824 days
197920 days
19809 days
198219 days
198321 days
198427 days
198518 days
19867 days
198726 days
198815 days
198920 days
199018 days
199136 days
199215 days
1993n/a
199922 days
200028 days
200141 days
200215 days
200315 days
200415 days
200522 days
200622 days
200722 days
200815 days
200925 days
201015 days
201115 days
201218 days
201320 days
201414 days
201514 days
201643 days
201720 days
201822 days
201920 days
202015 days
202117 days
202229 days
202325 days
202446 days
202528 days
202639 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Frost Dates and Growing Season

47 years with a frost

Across 47 years with a frost, the median last spring frost at Rock Mills falls on 9 April and the median first autumn frost on 30 October, which leaves a median of 202 days between them.

Fitted over all years, the growing season changes by +0.1 days per decade at this station.

Frost dates and growing season at Rock Mills
MeasureMedian, all yearsEarliest periodRecent period (1964 to 2025)Recent against earliestFitted trend
Last spring frost9 Apriln/a9 Apriln/a-0.4 days per decade
First autumn frost30 Octobern/a29 Octobern/a-0.4 days per decade
Growing days202 daysn/a203 daysn/a+0.1 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

56 years, 1939 to 2025

A day with at least 82.1 mm (3.2 in) of rain is expected about once in 2 years. A day with at least 169.5 mm (6.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Rock Mills: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years82.1 mm (3.2 in)
5 years102.8 mm (4.0 in)
10 years117.5 mm (4.6 in)
25 years137.4 mm (5.4 in)
50 years153.0 mm (6.0 in)
100 years169.5 mm (6.7 in)Longer than the 56 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 56 years of values from 1939 to 2025.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 178.8 mm (7.0 in) in 1961; 147.1 mm (5.8 in) in 1999; 127.0 mm (5.0 in) in 2006.

Station Changes

2 suspected

2 changes were suspected in the annual mean temperature of Rock Mills, at 1963 and 1969. Each is measured against neighbouring stations.

  • Relative to 5 neighbouring stations, the station's annual mean temperature from 1963 ran 0.5 C (0.8 F) lower than in the years before (likely change).
  • Relative to 5 neighbouring stations, the station's annual mean temperature from 1969 ran 0.3 C (0.5 F) higher than in the years before (possible change).
Suspected changes in the annual mean temperature at Rock Mills, against neighbouring stations
YearShift (C)Shift (F)StrengthNeighbours
1963-0.5-0.8likely5
1969+0.3+0.5possible5

Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.

Climate Twins

2000 to 2025 against 1961 to 1990

Over 2000 to 2025, Rock Mills had a mean temperature of 16.8 C (62.2 F) and 1,259.4 mm (49.6 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Forsyth 6 NNW (United States, 127 km away), Newberry (United States, 362 km away) and Pelion 0.8 NW (United States, 380 km away).

Climate twins of Rock Mills: stations whose 1961 to 1990 climate is closest to its 2000 to 2025 climate
Twin stationCountryDistance awayMean temperature, 1961-1990Rain a year, 1961-1990Climate difference
Forsyth 6 NNWUnited States127 km (79 mi)17.0 C (62.5 F)1,255.0 mm (49.4 in)0.43
NewberryUnited States362 km (225 mi)16.8 C (62.3 F)1,237.2 mm (48.7 in)0.48
Pelion 0.8 NWUnited States380 km (236 mi)16.9 C (62.4 F)1,269.8 mm (50.0 in)0.50

Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.

Download the Data

  • Data for Rock Mills standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Rock Mills threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-12).