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Santa Rosa Weather Records (MXN00024076)

Record envelope, standing records and threshold days for Santa Rosa (MXN00024076), Mexico, with 50 years of record.

Key Facts for Santa Rosa

  • Santa Rosa (MXN00024076) is a weather station in Mexico at 22.00 latitude and -99.05 longitude, 81 m (265 ft) above sea level.
  • The station reports from 1961 to 2010, 50 years of record.
  • 1,464 records set at Santa Rosa still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Santa Rosa tied a daily record low minimum temperature of 6.1 C (43.0 F) on 11 December 2010.

About the Station

  • Location: Mexico, 22.00 latitude, -99.05 longitude.
  • Elevation: 81 m (265 ft).
  • Period of record: 1961 to 2010, 50 years.
  • Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Santa Rosa, with 2026 drawn through them The band shows the record high and record low for each calendar day at Santa Rosa. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 01020304050 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Santa Rosa. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Santa Rosa, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan40.0 C (104.0 F)0.0 C (32.0 F)n/an/a
Feb43.9 C (111.0 F)1.7 C (35.1 F)n/an/a
Mar45.0 C (113.0 F)2.2 C (36.0 F)n/an/a
Apr48.3 C (118.9 F)6.7 C (44.1 F)n/an/a
May48.3 C (118.9 F)14.4 C (57.9 F)n/an/a
Jun46.1 C (115.0 F)16.7 C (62.1 F)n/an/a
Jul40.0 C (104.0 F)15.6 C (60.1 F)n/an/a
Aug43.9 C (111.0 F)19.4 C (66.9 F)n/an/a
Sep40.0 C (104.0 F)13.3 C (55.9 F)n/an/a
Oct39.4 C (102.9 F)7.8 C (46.0 F)n/an/a
Nov40.0 C (104.0 F)3.9 C (39.0 F)n/an/a
Dec37.2 C (99.0 F)0.0 C (32.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Santa Rosa by the year they were set 1,464 records at Santa Rosa still stand. 1964 holds the most, with 79. 0204060801961: 301962: 571963: 301964: 791965: 461966: 331967: 381968: 301969: 681970: 421971: 261972: 231973: 341974: 351975: 201976: 321977: 101978: 161979: 321980: 371981: 301982: 241983: 281984: 321986: 81987: 271988: 201989: 471990: 231991: 291992: 191993: 211994: 191995: 411996: 501997: 271998: 361999: 152000: 392001: 182002: 172003: 182004: 202005: 132006: 202007: 302008: 292009: 142010: 321961196619711976198119871992199720022007
1,464 records at Santa Rosa still stand. 1964 holds the most, with 79.
Standing records at Santa Rosa by the year they were set
Year setStanding records
196130
196257
196330
196479
196546
196633
196738
196830
196968
197042
197126
197223
197334
197435
197520
197632
197710
197816
197932
198037
198130
198224
198328
198432
19868
198727
198820
198947
199023
199129
199219
199321
199419
199541
199650
199727
199836
199915
200039
200118
200217
200318
200420
200513
200620
200730
200829
200914
201032

Wettest Day of Each Month

Aug: 264.4 mm (10.4 in)
Record daily precipitation for each month at Santa Rosa The wettest day on record for each calendar month at Santa Rosa. The most was 264.4 mm (10.4 in) on 7 August 1990. 0100200300 Jan: 28.7 mm (1.1 in), 13 January 1990 Jan Feb: 35.3 mm (1.4 in), 4 February 2007 Feb Mar: 93.7 mm (3.7 in), 27 March 1992 Mar Apr: 67.6 mm (2.7 in), 5 April 1969 Apr May: 103.9 mm (4.1 in), 14 May 1984 May Jun: 201.4 mm (7.9 in), 15 June 2001 Jun Jul: 249.7 mm (9.8 in), 2 July 1991 Jul Aug: 264.4 mm (10.4 in), 7 August 1990 Aug Sep: 254.0 mm (10.0 in), 2 September 1977 Sep Oct: 142.2 mm (5.6 in), 18 October 1966 Oct Nov: 75.7 mm (3.0 in), 11 November 1967 Nov Dec: 91.7 mm (3.6 in), 3 December 1979 Dec
The wettest day on record for each calendar month at Santa Rosa. The most was 264.4 mm (10.4 in) on 7 August 1990.
Record daily precipitation for each month at Santa Rosa
MonthRecord daily precipitation (mm)Date
Jan28.7 mm (1.1 in)13 January 1990
Feb35.3 mm (1.4 in)4 February 2007
Mar93.7 mm (3.7 in)27 March 1992
Apr67.6 mm (2.7 in)5 April 1969
May103.9 mm (4.1 in)14 May 1984
Jun201.4 mm (7.9 in)15 June 2001
Jul249.7 mm (9.8 in)2 July 1991
Aug264.4 mm (10.4 in)7 August 1990
Sep254.0 mm (10.0 in)2 September 1977
Oct142.2 mm (5.6 in)18 October 1966
Nov75.7 mm (3.0 in)11 November 1967
Dec91.7 mm (3.6 in)3 December 1979

Period of Record Coverage

1961 to 2010
Days with data per year at Santa Rosa 49 years of record at Santa Rosa, 1961 to 2010. 5 years have data for under 90 percent of days and are left out of rankings: 1969, 1986, 1988, 1992, 1993. 1961: 364 of 365 days1962: 363 of 365 days1963: 363 of 365 days1964: 363 of 366 days1965: 362 of 365 days1966: 359 of 365 days1967: 360 of 365 days1968: 363 of 366 days1969: 321 of 365 days1970: 361 of 365 days1971: 363 of 365 days1972: 364 of 366 days1973: 362 of 365 days1974: 364 of 365 days1975: 360 of 365 days1976: 361 of 366 days1977: 332 of 365 days1978: 358 of 365 days1979: 362 of 365 days1980: 358 of 366 days1981: 360 of 365 days1982: 360 of 365 days1983: 363 of 365 days1984: 332 of 366 days1986: 210 of 365 days1987: 364 of 365 days1988: 295 of 366 days1989: 359 of 365 days1990: 359 of 365 days1991: 347 of 365 days1992: 322 of 366 days1993: 316 of 365 days1994: 364 of 365 days1995: 364 of 365 days1996: 365 of 366 days1997: 360 of 365 days1998: 365 of 365 days1999: 364 of 365 days2000: 366 of 366 days2001: 365 of 365 days2002: 365 of 365 days2003: 364 of 365 days2004: 349 of 366 days2005: 351 of 365 days2006: 365 of 365 days2007: 365 of 365 days2008: 355 of 366 days2009: 345 of 365 days2010: 365 of 365 days19701980199020002010
49 years of record at Santa Rosa, 1961 to 2010. 5 years have data for under 90 percent of days and are left out of rankings: 1969, 1986, 1988, 1992, 1993.
Days with data per year at Santa Rosa
YearDays with dataShare of yearComplete
1961364100%Yes
196236399%Yes
196336399%Yes
196436399%Yes
196536299%Yes
196635998%Yes
196736099%Yes
196836399%Yes
196932188%No
197036199%Yes
197136399%Yes
197236499%Yes
197336299%Yes
1974364100%Yes
197536099%Yes
197636199%Yes
197733291%Yes
197835898%Yes
197936299%Yes
198035898%Yes
198136099%Yes
198236099%Yes
198336399%Yes
198433291%Yes
198621058%No
1987364100%Yes
198829581%No
198935998%Yes
199035998%Yes
199134795%Yes
199232288%No
199331687%No
1994364100%Yes
1995364100%Yes
1996365100%Yes
199736099%Yes
1998365100%Yes
1999364100%Yes
2000366100%Yes
2001365100%Yes
2002365100%Yes
2003364100%Yes
200434995%Yes
200535196%Yes
2006365100%Yes
2007365100%Yes
200835597%Yes
200934595%Yes
2010365100%Yes

Latest Records

20
Latest records at Santa Rosa
DateStationRecordValueBeat old record byOld record stoodSignificance
11 December 2010Santa Rosa, MXdaily low min (Tie)6.1 C (43.0 F)tie1 year1 of 100 (Routine)
3 December 2010Santa Rosa, MXdaily low min8.9 C (48.0 F)0.5 C (0.9 F)13 years10 of 100 (Routine)
2 December 2010Santa Rosa, MXdaily low min7.8 C (46.0 F)0.5 C (0.9 F)13 years10 of 100 (Routine)
29 November 2010Santa Rosa, MXdaily high max35.0 C (95.0 F)1.7 C (3.1 F)5 years10 of 100 (Routine)
25 November 2010Santa Rosa, MXdaily high max (Tie)32.8 C (91.0 F)tie43 years4 of 100 (Routine)
23 November 2010Santa Rosa, MXdaily high max33.3 C (91.9 F)0.5 C (0.9 F)7 years8 of 100 (Routine)
15 November 2010Santa Rosa, MXdaily high max (Tie)33.9 C (93.0 F)tie21 years2 of 100 (Routine)
8 November 2010Santa Rosa, MXdaily low min8.9 C (48.0 F)2.8 C (5.0 F)37 years23 of 100 (Routine)
7 November 2010Santa Rosa, MXdaily low min7.2 C (45.0 F)2.8 C (5.0 F)5 years13 of 100 (Routine)
6 November 2010Santa Rosa, MXdaily low min6.1 C (43.0 F)2.8 C (5.0 F)28 years20 of 100 (Routine)
5 November 2010Santa Rosa, MXdaily low min6.7 C (44.1 F)1.1 C (2.0 F)28 years15 of 100 (Routine)
25 September 2010Santa Rosa, MXdaily rain126.0 mm (5.0 in)57.4 mm (2.3 in)43 years39 of 100 (Notable)
19 September 2010Santa Rosa, MXdaily low max (Tie)28.9 C (84.0 F)tie28 years3 of 100 (Routine)
18 September 2010Santa Rosa, MXdaily rain76.2 mm (3.0 in)7.1 mm (0.28 in)16 years11 of 100 (Routine)
17 September 2010Santa Rosa, MXdaily rain31.0 mm (1.2 in)6.6 mm (0.26 in)41 years19 of 100 (Routine)
28 August 2010Santa Rosa, MXdaily low min21.1 C (70.0 F)0.6 C (1.1 F)8 years11 of 100 (Routine)
27 August 2010Santa Rosa, MXdaily low min21.1 C (70.0 F)0.6 C (1.1 F)48 years23 of 100 (Routine)
29 July 2010Santa Rosa, MXdaily rain79.5 mm (3.1 in)68.1 mm (2.7 in)23 years34 of 100 (Routine)
29 July 2010Santa Rosa, MXdaily low max27.2 C (81.0 F)1.7 C (3.1 F)23 years16 of 100 (Routine)
28 July 2010Santa Rosa, MXdaily rain74.9 mm (2.9 in)11.9 mm (0.5 in)32 years18 of 100 (Routine)

Climate Trend

39 complete years, 1961 to 2010
Annual mean temperature at Santa Rosa as warming stripes, 1961 to 2010 One stripe for each of 39 complete years at Santa Rosa, 1961 to 2010. Blue stripes are years cooler than the station's own mean of 25.2 C (77.4 F); red stripes are warmer. The coolest year was 1976, at 23.8 C (74.9 F), and the warmest was 1998, at 26.6 C (80.0 F). The strongest colour marks a difference of 1.5 C (2.7 F). 1961: 25.1 C, -0.1 C from the station mean1962: 26.1 C, +0.9 C from the station mean1963: 25.7 C, +0.5 C from the station mean1964: 26.0 C, +0.8 C from the station mean1965: 25.8 C, +0.6 C from the station mean1966: 24.7 C, -0.5 C from the station mean1967: 25.6 C, +0.4 C from the station mean1968: 24.8 C, -0.5 C from the station mean1970: 24.6 C, -0.7 C from the station mean1971: 25.6 C, +0.3 C from the station mean1972: 25.3 C, +0.1 C from the station mean1973: 24.9 C, -0.3 C from the station mean1974: 24.8 C, -0.5 C from the station mean1975: 24.9 C, -0.4 C from the station mean1976: 23.8 C, -1.4 C from the station mean1978: 24.9 C, -0.3 C from the station mean1979: 24.7 C, -0.6 C from the station mean1980: 25.2 C, 0.0 C from the station mean1981: 24.8 C, -0.5 C from the station mean1982: 25.4 C, +0.2 C from the station mean1983: 25.0 C, -0.3 C from the station mean1987: 24.4 C, -0.9 C from the station mean1989: 25.2 C, 0.0 C from the station mean1990: 25.5 C, +0.2 C from the station mean1991: 25.5 C, +0.3 C from the station mean1994: 25.8 C, +0.6 C from the station mean1995: 26.2 C, +0.9 C from the station mean1996: 25.7 C, +0.5 C from the station mean1997: 25.4 C, +0.2 C from the station mean1998: 26.6 C, +1.4 C from the station mean1999: 25.7 C, +0.4 C from the station mean2000: 25.7 C, +0.5 C from the station mean2001: 25.4 C, +0.1 C from the station mean2002: 25.1 C, -0.2 C from the station mean2003: 25.4 C, +0.2 C from the station mean2006: 25.5 C, +0.3 C from the station mean2007: 24.7 C, -0.6 C from the station mean2008: 24.9 C, -0.4 C from the station mean2010: 24.1 C, -1.1 C from the station mean19611965197019751980198519901995200020052010
One stripe for each of 39 complete years at Santa Rosa, 1961 to 2010. Blue stripes are years cooler than the station's own mean of 25.2 C (77.4 F); red stripes are warmer. The coolest year was 1976, at 23.8 C (74.9 F), and the warmest was 1998, at 26.6 C (80.0 F). The strongest colour marks a difference of 1.5 C (2.7 F).
Annual mean temperature at Santa Rosa as warming stripes, 1961 to 2010
YearAnnual mean temperatureDifference from the station mean
196125.1 C-0.10 C
196226.1 C+0.89 C
196325.7 C+0.48 C
196426.0 C+0.80 C
196525.8 C+0.60 C
196624.7 C-0.53 C
196725.6 C+0.40 C
196824.8 C-0.49 C
197024.6 C-0.68 C
197125.6 C+0.33 C
197225.3 C+0.09 C
197324.9 C-0.31 C
197424.8 C-0.48 C
197524.9 C-0.38 C
197623.8 C-1.41 C
197824.9 C-0.33 C
197924.7 C-0.59 C
198025.2 C0.00 C
198124.8 C-0.45 C
198225.4 C+0.17 C
198325.0 C-0.25 C
198724.4 C-0.89 C
198925.2 C-0.02 C
199025.5 C+0.22 C
199125.5 C+0.30 C
199425.8 C+0.58 C
199526.2 C+0.92 C
199625.7 C+0.46 C
199725.4 C+0.18 C
199826.6 C+1.40 C
199925.7 C+0.45 C
200025.7 C+0.48 C
200125.4 C+0.11 C
200225.1 C-0.18 C
200325.4 C+0.20 C
200625.5 C+0.27 C
200724.7 C-0.58 C
200824.9 C-0.39 C
201024.1 C-1.13 C

The fitted trend in annual mean temperature here over 1961 to 2010 is 0.00 C (-0.13 to 0.14) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.01 F (-0.23 to 0.24) per decade. The slope is a straight line fitted to 39 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Santa Rosa
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.00 C (-0.13 to 0.14) per decade0.01 F (-0.23 to 0.24) per decade1961 to 201039Not clearly different from zero
Mean daily maximum0.19 C (-0.02 to 0.40) per decade0.34 F (-0.03 to 0.71) per decade1961 to 201039Not clearly different from zero
Mean daily minimum-0.2 C (-0.3 to -0.1) per decade-0.3 F (-0.5 to -0.1) per decade1961 to 201039Fall

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

1961 to 2010
Yearly extremes at Santa Rosa: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)48.3 C (118.9 F)197343.3 C (109.9 F)49
Coldest night (TNn)0.0 C (32.0 F)19623.9 C (39.0 F)49
Wettest day (Rx1day)264.4 mm (10.4 in)1990110.0 mm (4.3 in)49
Wettest five days (Rx5day)589.3 mm (23.2 in)1991216.7 mm (8.5 in)49
Longest dry spell (CDD)79 days201035 days49

Hottest day (TXx)

Hottest day (TXx) at Santa Rosa by year The hottest day of the year at Santa Rosa, 1961 to 2010. The record is 48.3 C (118.9 F) in 1973, marked on the chart; the median year is 43.3 C (109.9 F). 3540455019701980199020002010Record: 48.3 C (118.9 F) in 1973
The hottest day of the year at Santa Rosa, 1961 to 2010. The record is 48.3 C (118.9 F) in 1973, marked on the chart; the median year is 43.3 C (109.9 F).
Hottest day (TXx) at Santa Rosa by year
YearHottest day (TXx)
196146.1 C (115.0 F)
196243.9 C (111.0 F)
196342.8 C (109.0 F)
196446.7 C (116.1 F)
196545.0 C (113.0 F)
196642.2 C (108.0 F)
196742.8 C (109.0 F)
196840.0 C (104.0 F)
196943.3 C (109.9 F)
197040.0 C (104.0 F)
197147.2 C (117.0 F)
197242.8 C (109.0 F)
197348.3 C (118.9 F)
197445.0 C (113.0 F)
197544.4 C (111.9 F)
197637.8 C (100.0 F)
197741.7 C (107.1 F)
197846.1 C (115.0 F)
197945.6 C (114.1 F)
198042.8 C (109.0 F)
198140.0 C (104.0 F)
198242.8 C (109.0 F)
198343.9 C (111.0 F)
198446.7 C (116.1 F)
198639.4 C (102.9 F)
198741.7 C (107.1 F)
198842.2 C (108.0 F)
198942.8 C (109.0 F)
199041.7 C (107.1 F)
199146.7 C (116.1 F)
199239.4 C (102.9 F)
199341.1 C (106.0 F)
199442.2 C (108.0 F)
199546.1 C (115.0 F)
199643.9 C (111.0 F)
199741.7 C (107.1 F)
199848.3 C (118.9 F)
199946.7 C (116.1 F)
200045.0 C (113.0 F)
200143.9 C (111.0 F)
200243.3 C (109.9 F)
200347.8 C (118.0 F)
200442.8 C (109.0 F)
200545.0 C (113.0 F)
200643.9 C (111.0 F)
200740.0 C (104.0 F)
200845.6 C (114.1 F)
200942.8 C (109.0 F)
201045.0 C (113.0 F)

Coldest night (TNn)

Coldest night (TNn) at Santa Rosa by year The coldest night of the year at Santa Rosa, 1961 to 2010. The record is 0.0 C (32.0 F) in 1962, marked on the chart; the median year is 3.9 C (39.0 F). 02.557.51019701980199020002010Record: 0.0 C (32.0 F) in 1962
The coldest night of the year at Santa Rosa, 1961 to 2010. The record is 0.0 C (32.0 F) in 1962, marked on the chart; the median year is 3.9 C (39.0 F).
Coldest night (TNn) at Santa Rosa by year
YearColdest night (TNn)
19615.0 C (41.0 F)
19620.0 C (32.0 F)
19631.7 C (35.1 F)
19642.8 C (37.0 F)
19653.9 C (39.0 F)
19665.0 C (41.0 F)
19675.0 C (41.0 F)
19685.0 C (41.0 F)
19695.0 C (41.0 F)
19703.9 C (39.0 F)
19715.0 C (41.0 F)
19725.0 C (41.0 F)
19730.6 C (33.1 F)
19742.2 C (36.0 F)
19750.0 C (32.0 F)
19761.7 C (35.1 F)
19771.1 C (34.0 F)
19786.7 C (44.1 F)
19792.2 C (36.0 F)
19805.0 C (41.0 F)
19816.1 C (43.0 F)
19821.7 C (35.1 F)
19830.0 C (32.0 F)
19845.0 C (41.0 F)
19868.9 C (48.0 F)
19872.2 C (36.0 F)
19880.6 C (33.1 F)
19890.0 C (32.0 F)
19903.9 C (39.0 F)
19917.8 C (46.0 F)
19928.3 C (46.9 F)
19934.4 C (39.9 F)
19943.3 C (37.9 F)
19957.8 C (46.0 F)
19961.7 C (35.1 F)
19970.0 C (32.0 F)
19986.7 C (44.1 F)
19992.2 C (36.0 F)
20001.7 C (35.1 F)
20013.9 C (39.0 F)
20025.0 C (41.0 F)
20031.7 C (35.1 F)
20048.3 C (46.9 F)
20057.2 C (45.0 F)
20062.2 C (36.0 F)
20075.0 C (41.0 F)
20085.0 C (41.0 F)
20095.6 C (42.1 F)
20103.3 C (37.9 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Santa Rosa by year The wettest day of the year at Santa Rosa, 1961 to 2010. The record is 264.4 mm (10.4 in) in 1990, marked on the chart; the median year is 110.0 mm (4.3 in). 010020030019701980199020002010Record: 264.4 mm (10.4 in) in 1990
The wettest day of the year at Santa Rosa, 1961 to 2010. The record is 264.4 mm (10.4 in) in 1990, marked on the chart; the median year is 110.0 mm (4.3 in).
Wettest day (Rx1day) at Santa Rosa by year
YearWettest day (Rx1day)
196191.9 mm (3.6 in)
196279.0 mm (3.1 in)
1963100.8 mm (4.0 in)
196471.4 mm (2.8 in)
196565.3 mm (2.6 in)
1966142.2 mm (5.6 in)
1967132.1 mm (5.2 in)
1968146.1 mm (5.8 in)
1969146.3 mm (5.8 in)
1970110.0 mm (4.3 in)
197176.5 mm (3.0 in)
197267.6 mm (2.7 in)
1973111.0 mm (4.4 in)
1974177.8 mm (7.0 in)
1975199.9 mm (7.9 in)
1976118.1 mm (4.6 in)
1977254.0 mm (10.0 in)
1978128.8 mm (5.1 in)
197991.7 mm (3.6 in)
198053.3 mm (2.1 in)
1981105.7 mm (4.2 in)
1982127.8 mm (5.0 in)
1983102.4 mm (4.0 in)
1984103.9 mm (4.1 in)
198680.0 mm (3.1 in)
198791.7 mm (3.6 in)
1988105.4 mm (4.1 in)
1989121.2 mm (4.8 in)
1990264.4 mm (10.4 in)
1991249.7 mm (9.8 in)
1992168.7 mm (6.6 in)
1993141.2 mm (5.6 in)
199477.5 mm (3.1 in)
199593.5 mm (3.7 in)
1996110.2 mm (4.3 in)
199781.5 mm (3.2 in)
1998111.0 mm (4.4 in)
1999101.9 mm (4.0 in)
2000154.4 mm (6.1 in)
2001201.4 mm (7.9 in)
200278.0 mm (3.1 in)
2003100.6 mm (4.0 in)
2004117.1 mm (4.6 in)
2005101.9 mm (4.0 in)
200647.5 mm (1.9 in)
2007147.3 mm (5.8 in)
2008128.3 mm (5.1 in)
200996.3 mm (3.8 in)
2010126.0 mm (5.0 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Santa Rosa by year The wettest five days of the year at Santa Rosa, 1961 to 2010. The record is 589.3 mm (23.2 in) in 1991, marked on the chart; the median year is 216.7 mm (8.5 in). 020040060019701980199020002010Record: 589.3 mm (23.2 in) in 1991
The wettest five days of the year at Santa Rosa, 1961 to 2010. The record is 589.3 mm (23.2 in) in 1991, marked on the chart; the median year is 216.7 mm (8.5 in).
Wettest five days (Rx5day) at Santa Rosa by year
YearWettest five days (Rx5day)
1961249.6 mm (9.8 in)
196294.0 mm (3.7 in)
1963239.7 mm (9.4 in)
196494.9 mm (3.7 in)
1965184.5 mm (7.3 in)
1966247.5 mm (9.7 in)
1967293.9 mm (11.6 in)
1968153.2 mm (6.0 in)
1969198.4 mm (7.8 in)
1970277.9 mm (10.9 in)
1971132.7 mm (5.2 in)
1972224.7 mm (8.8 in)
1973286.0 mm (11.3 in)
1974420.3 mm (16.5 in)
1975394.9 mm (15.5 in)
1976393.2 mm (15.5 in)
1977376.8 mm (14.8 in)
1978223.5 mm (8.8 in)
1979136.9 mm (5.4 in)
1980108.0 mm (4.3 in)
1981185.4 mm (7.3 in)
1982139.2 mm (5.5 in)
1983213.1 mm (8.4 in)
1984176.3 mm (6.9 in)
1986146.9 mm (5.8 in)
1987133.2 mm (5.2 in)
1988315.0 mm (12.4 in)
1989230.7 mm (9.1 in)
1990353.9 mm (13.9 in)
1991589.3 mm (23.2 in)
1992300.3 mm (11.8 in)
1993365.0 mm (14.4 in)
1994168.2 mm (6.6 in)
1995157.8 mm (6.2 in)
1996237.6 mm (9.4 in)
1997205.2 mm (8.1 in)
1998163.9 mm (6.5 in)
1999183.4 mm (7.2 in)
2000229.6 mm (9.0 in)
2001231.4 mm (9.1 in)
2002126.3 mm (5.0 in)
2003216.7 mm (8.5 in)
2004178.9 mm (7.0 in)
2005143.9 mm (5.7 in)
200671.4 mm (2.8 in)
2007266.2 mm (10.5 in)
2008393.0 mm (15.5 in)
2009185.3 mm (7.3 in)
2010275.5 mm (10.8 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Santa Rosa by year The longest dry spell of the year at Santa Rosa, 1961 to 2010. The record is 79 days in 2010, marked on the chart; the median year is 35 days. 02040608019701980199020002010Record: 79 days in 2010
The longest dry spell of the year at Santa Rosa, 1961 to 2010. The record is 79 days in 2010, marked on the chart; the median year is 35 days.
Longest dry spell (CDD) at Santa Rosa by year
YearLongest dry spell (CDD)
196132 days
196238 days
196329 days
196444 days
196528 days
196622 days
196724 days
196825 days
196952 days
197026 days
197155 days
197228 days
197337 days
197430 days
197542 days
197644 days
197725 days
197827 days
197945 days
198024 days
198133 days
198238 days
198364 days
198460 days
198624 days
198736 days
198823 days
198957 days
199031 days
199128 days
199214 days
199333 days
199427 days
199536 days
199641 days
199727 days
199844 days
199941 days
200052 days
200140 days
200237 days
200347 days
200429 days
200553 days
200635 days
200724 days
200830 days
200949 days
201079 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.

Rainfall Return Levels

46 years, 1961 to 2010

A day with at least 109.2 mm (4.3 in) of rain is expected about once in 2 years. A day with at least 302.3 mm (11.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Santa Rosa: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years109.2 mm (4.3 in)
5 years151.0 mm (5.9 in)
10 years182.2 mm (7.2 in)
25 years226.3 mm (8.9 in)
50 years262.7 mm (10.3 in)Longer than the 46 years of record
100 years302.3 mm (11.9 in)Longer than the 46 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, 46 years of values from 1961 to 2010.

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: 264.4 mm (10.4 in) in 1990; 254.0 mm (10.0 in) in 1977; 249.7 mm (9.8 in) in 1991.

Download the Data

  • Data for Santa Rosa standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Santa Rosa 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 (2025-12-31).