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Okolona Weather Records (USC00226515)

Record envelope, standing records and threshold days for Okolona (USC00226515), Mississippi, United States, with 94 years of record.

Key Facts for Okolona

  • Okolona (USC00226515) is a weather station in Mississippi, United States at 34.00 latitude and -88.75 longitude, 98 m (322 ft) above sea level.
  • The station reports from 1893 to 1986, 94 years of record.
  • 1,464 records set at Okolona still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Okolona set a daily record precipitation of 41.4 mm (1.6 in) on 15 October 1985.

About the Station

  • Location: Mississippi, United States, 34.00 latitude, -88.75 longitude.
  • Elevation: 98 m (322 ft).
  • Period of record: 1893 to 1986, 94 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Okolona, with 2026 drawn through them The band shows the record high and record low for each calendar day at Okolona. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -40-200204060 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Okolona. 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 Okolona, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan25.6 C (78.1 F)-21.1 C (-6.0 F)n/an/a
Feb31.7 C (89.1 F)-17.2 C (1.0 F)n/an/a
Mar32.2 C (90.0 F)-12.8 C (9.0 F)n/an/a
Apr34.4 C (93.9 F)-2.8 C (27.0 F)n/an/a
May38.3 C (100.9 F)1.1 C (34.0 F)n/an/a
Jun40.6 C (105.1 F)8.3 C (46.9 F)n/an/a
Jul42.2 C (108.0 F)11.7 C (53.1 F)n/an/a
Aug41.7 C (107.1 F)11.7 C (53.1 F)n/an/a
Sep43.3 C (109.9 F)2.8 C (37.0 F)n/an/a
Oct37.2 C (99.0 F)-3.9 C (25.0 F)n/an/a
Nov30.6 C (87.1 F)-10.0 C (14.0 F)n/an/a
Dec28.9 C (84.0 F)-16.1 C (3.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Okolona by the year they were set 1,464 records at Okolona still stand. 1902 holds the most, with 83. 02550751001893: 101894: 41895: 491896: 721897: 431898: 461899: 481900: 311901: 501902: 831903: 481904: 351905: 581906: 271907: 581908: 301909: 411910: 351911: 501912: 311913: 331914: 411915: 421916: 501917: 581918: 611919: 301920: 241921: 391922: 341923: 331924: 621925: 621926: 291927: 17189318971901190519091913191719211925
1,464 records at Okolona still stand. 1902 holds the most, with 83.
Standing records at Okolona by the year they were set
Year setStanding records
189310
18944
189549
189672
189743
189846
189948
190031
190150
190283
190348
190435
190558
190627
190758
190830
190941
191035
191150
191231
191333
191441
191542
191650
191758
191861
191930
192024
192139
192234
192333
192462
192562
192629
192717

All-Time Record Progression

3 new records
When Okolona set new all-time records 3 all-time records were set at Okolona between 5 September 1925 and 28 March 1951. Each dot is a new record. Record high maximum temperatureRecord daily precipitation5 September 1925: Record high maximum temperature 43.3 C (109.9 F)19 July 1946: Record daily precipitation 132.1 mm (5.2 in)28 March 1951: Record daily precipitation 254.0 mm (10.0 in)192519301935194019451950
3 all-time records were set at Okolona between 5 September 1925 and 28 March 1951. Each dot is a new record.
When Okolona set new all-time records
DateKindDetail
1925-09-05Record high maximum temperatureRecord high maximum temperature 43.3 C (109.9 F)
1946-07-19Record daily precipitationRecord daily precipitation 132.1 mm (5.2 in)
1951-03-28Record daily precipitationRecord daily precipitation 254.0 mm (10.0 in)

Wettest Day of Each Month

Mar: 254.0 mm (10.0 in)
Record daily precipitation for each month at Okolona The wettest day on record for each calendar month at Okolona. The most was 254.0 mm (10.0 in) on 28 March 1951. 0100200300 Jan: 119.4 mm (4.7 in), 3 January 1949 Jan Feb: 136.1 mm (5.4 in), 20 February 1961 Feb Mar: 254.0 mm (10.0 in), 28 March 1951 Mar Apr: 111.0 mm (4.4 in), 4 April 1911 Apr May: 85.9 mm (3.4 in), 19 May 1983 May Jun: 102.1 mm (4.0 in), 27 June 1976 Jun Jul: 132.1 mm (5.2 in), 19 July 1946 Jul Aug: 91.4 mm (3.6 in), 4 August 1908 Aug Sep: 101.6 mm (4.0 in), 28 September 1906 Sep Oct: 130.0 mm (5.1 in), 3 October 1957 Oct Nov: 114.3 mm (4.5 in), 13 November 1961 Nov Dec: 142.2 mm (5.6 in), 3 December 1983 Dec
The wettest day on record for each calendar month at Okolona. The most was 254.0 mm (10.0 in) on 28 March 1951.
Record daily precipitation for each month at Okolona
MonthRecord daily precipitation (mm)Date
Jan119.4 mm (4.7 in)3 January 1949
Feb136.1 mm (5.4 in)20 February 1961
Mar254.0 mm (10.0 in)28 March 1951
Apr111.0 mm (4.4 in)4 April 1911
May85.9 mm (3.4 in)19 May 1983
Jun102.1 mm (4.0 in)27 June 1976
Jul132.1 mm (5.2 in)19 July 1946
Aug91.4 mm (3.6 in)4 August 1908
Sep101.6 mm (4.0 in)28 September 1906
Oct130.0 mm (5.1 in)3 October 1957
Nov114.3 mm (4.5 in)13 November 1961
Dec142.2 mm (5.6 in)3 December 1983

Period of Record Coverage

1893 to 1927
Days with data per year at Okolona 35 years of record at Okolona, 1893 to 1927. 5 years have data for under 90 percent of days and are left out of rankings: 1893, 1894, 1896, 1906, 1927. 1893: 84 of 365 days1894: 61 of 365 days1895: 341 of 365 days1896: 302 of 366 days1897: 330 of 365 days1898: 362 of 365 days1899: 350 of 365 days1900: 350 of 365 days1901: 354 of 365 days1902: 360 of 365 days1903: 343 of 365 days1904: 365 of 366 days1905: 354 of 365 days1906: 304 of 365 days1907: 363 of 365 days1908: 365 of 366 days1909: 365 of 365 days1910: 364 of 365 days1911: 365 of 365 days1912: 343 of 366 days1913: 354 of 365 days1914: 365 of 365 days1915: 365 of 365 days1916: 362 of 366 days1917: 358 of 365 days1918: 365 of 365 days1919: 363 of 365 days1920: 362 of 366 days1921: 365 of 365 days1922: 361 of 365 days1923: 349 of 365 days1924: 364 of 366 days1925: 339 of 365 days1926: 364 of 365 days1927: 89 of 365 days1895190019051910191519201925
35 years of record at Okolona, 1893 to 1927. 5 years have data for under 90 percent of days and are left out of rankings: 1893, 1894, 1896, 1906, 1927.
Days with data per year at Okolona
YearDays with dataShare of yearComplete
18938423%No
18946117%No
189534193%Yes
189630283%No
189733090%Yes
189836299%Yes
189935096%Yes
190035096%Yes
190135497%Yes
190236099%Yes
190334394%Yes
1904365100%Yes
190535497%Yes
190630483%No
190736399%Yes
1908365100%Yes
1909365100%Yes
1910364100%Yes
1911365100%Yes
191234394%Yes
191335497%Yes
1914365100%Yes
1915365100%Yes
191636299%Yes
191735898%Yes
1918365100%Yes
191936399%Yes
192036299%Yes
1921365100%Yes
192236199%Yes
192334996%Yes
192436499%Yes
192533993%Yes
1926364100%Yes
19278924%No

Latest Records

20
Latest records at Okolona
DateStationRecordValueBeat old record byOld record stoodSignificance
15 October 1985Okolona, USdaily rain41.4 mm (1.6 in)14.0 mm (0.6 in)11 years21 of 100 (Routine)
9 September 1985Okolona, USdaily rain51.6 mm (2.0 in)26.2 mm (1.0 in)18 years30 of 100 (Routine)
17 August 1985Okolona, USdaily rain46.5 mm (1.8 in)24.9 mm (1.0 in)8 years27 of 100 (Routine)
6 August 1985Okolona, USdaily rain42.2 mm (1.7 in)11.5 mm (0.5 in)20 years22 of 100 (Routine)
17 July 1985Okolona, USdaily rain36.1 mm (1.4 in)5.6 mm (0.22 in)88 years38 of 100 (Notable)
18 June 1985Okolona, USdaily rain59.7 mm (2.4 in)30.2 mm (1.2 in)11 years33 of 100 (Routine)
9 May 1985Okolona, USdaily rain27.7 mm (1.1 in)9.2 mm (0.36 in)42 years27 of 100 (Routine)
24 April 1985Okolona, USdaily rain31.0 mm (1.2 in)4.1 mm (0.16 in)12 years14 of 100 (Routine)
12 February 1985Okolona, USdaily snow depth2.5 cm (1.0 in)2.5 cm (1.0 in)80 years20 of 100 (Routine)
17 January 1985Okolona, USdaily rain43.2 mm (1.7 in)2.6 mm (0.10 in)59 years27 of 100 (Routine)
4 January 1985Okolona, USdaily snowfall5.1 cm (2.0 in)4.3 cm (1.7 in)66 years35 of 100 (Notable)
22 October 1984Okolona, USdaily rain32.3 mm (1.3 in)7.9 mm (0.31 in)39 years25 of 100 (Routine)
21 October 1984Okolona, USdaily rain24.6 mm (1.0 in)4.3 mm (0.17 in)34 years20 of 100 (Routine)
8 October 1984Okolona, USdaily rain41.7 mm (1.6 in)5.4 mm (0.21 in)7 years14 of 100 (Routine)
8 May 1984Okolona, USdaily rain61.5 mm (2.4 in)30.0 mm (1.2 in)6 years30 of 100 (Routine)
3 April 1984Okolona, USdaily rain52.3 mm (2.1 in)0.7 mm (0.03 in)2 years9 of 100 (Routine)
10 March 1984Okolona, USdaily snowfall10.2 cm (4.0 in)10.2 cm (4.0 in)90 years56 of 100 (Notable)
28 February 1984Okolona, USdaily snowfall3.8 cm (1.5 in)3.8 cm (1.5 in)90 years20 of 100 (Routine)
15 January 1984Okolona, USdaily snowfall7.6 cm (3.0 in)5.1 cm (2.0 in)1 year17 of 100 (Routine)
3 December 1983Okolona, USmonthly rain142.2 mm (5.6 in)3.3 mm (0.13 in)0 years20 of 100 (Routine)

Climate Trend

24 complete years, 1900 to 1926
Annual mean temperature at Okolona as warming stripes, 1900 to 1926 One stripe for each of 24 complete years at Okolona, 1900 to 1926. Blue stripes are years cooler than the station's own mean of 17.1 C (62.9 F); red stripes are warmer. The coolest year was 1917, at 15.6 C (60.0 F), and the warmest was 1921, at 19.4 C (66.9 F). The strongest colour marks a difference of 2.3 C (4.1 F). 1900: 17.2 C, +0.1 C from the station mean1901: 16.1 C, -1.0 C from the station mean1902: 17.3 C, +0.2 C from the station mean1904: 16.9 C, -0.2 C from the station mean1905: 17.0 C, -0.2 C from the station mean1907: 17.0 C, -0.1 C from the station mean1908: 17.2 C, +0.1 C from the station mean1909: 17.0 C, -0.2 C from the station mean1910: 16.4 C, -0.7 C from the station mean1911: 17.9 C, +0.7 C from the station mean1912: 16.4 C, -0.8 C from the station mean1913: 16.7 C, -0.5 C from the station mean1914: 16.5 C, -0.6 C from the station mean1915: 16.6 C, -0.6 C from the station mean1916: 16.7 C, -0.4 C from the station mean1917: 15.6 C, -1.6 C from the station mean1918: 17.0 C, -0.1 C from the station mean1919: 18.0 C, +0.8 C from the station mean1920: 16.9 C, -0.3 C from the station mean1921: 19.4 C, +2.2 C from the station mean1922: 18.5 C, +1.3 C from the station mean1924: 17.3 C, +0.2 C from the station mean1925: 19.2 C, +2.1 C from the station mean1926: 16.8 C, -0.4 C from the station mean190019051910191519201925
One stripe for each of 24 complete years at Okolona, 1900 to 1926. Blue stripes are years cooler than the station's own mean of 17.1 C (62.9 F); red stripes are warmer. The coolest year was 1917, at 15.6 C (60.0 F), and the warmest was 1921, at 19.4 C (66.9 F). The strongest colour marks a difference of 2.3 C (4.1 F).
Annual mean temperature at Okolona as warming stripes, 1900 to 1926
YearAnnual mean temperatureDifference from the station mean
190017.2 C+0.07 C
190116.1 C-1.04 C
190217.3 C+0.17 C
190416.9 C-0.21 C
190517.0 C-0.18 C
190717.0 C-0.13 C
190817.2 C+0.09 C
190917.0 C-0.17 C
191016.4 C-0.71 C
191117.9 C+0.71 C
191216.4 C-0.79 C
191316.7 C-0.48 C
191416.5 C-0.61 C
191516.6 C-0.60 C
191616.7 C-0.44 C
191715.6 C-1.58 C
191817.0 C-0.11 C
191918.0 C+0.81 C
192016.9 C-0.27 C
192119.4 C+2.22 C
192218.5 C+1.30 C
192417.3 C+0.19 C
192519.2 C+2.06 C
192616.8 C-0.37 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

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

1893 to 1986
Yearly extremes at Okolona: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)43.3 C (109.9 F)192538.9 C (102.0 F)35
Coldest night (TNn)-21.1 C (-6.0 F)1918-11.7 C (10.9 F)35
Wettest day (Rx1day)254.0 mm (10.0 in)195176.2 mm (3.0 in)82
Wettest five days (Rx5day)382.8 mm (15.1 in)1951118.6 mm (4.7 in)82
Longest dry spell (CDD)58 days190424 days82

Hottest day (TXx)

Hottest day (TXx) at Okolona by year The hottest day of the year at Okolona, 1893 to 1986. The record is 43.3 C (109.9 F) in 1925, marked on the chart; the median year is 38.9 C (102.0 F). 253035404519001920194019601980Record: 43.3 C (109.9 F) in 1925
The hottest day of the year at Okolona, 1893 to 1986. The record is 43.3 C (109.9 F) in 1925, marked on the chart; the median year is 38.9 C (102.0 F).
Hottest day (TXx) at Okolona by year
YearHottest day (TXx)
189327.2 C (81.0 F)
189431.1 C (88.0 F)
189538.3 C (100.9 F)
189641.7 C (107.1 F)
189741.1 C (106.0 F)
189838.3 C (100.9 F)
189940.0 C (104.0 F)
190037.8 C (100.0 F)
190142.2 C (108.0 F)
190241.1 C (106.0 F)
190339.4 C (102.9 F)
190438.9 C (102.0 F)
190538.3 C (100.9 F)
190637.8 C (100.0 F)
190739.4 C (102.9 F)
190837.8 C (100.0 F)
190939.4 C (102.9 F)
191036.1 C (97.0 F)
191138.9 C (102.0 F)
191238.3 C (100.9 F)
191337.2 C (99.0 F)
191440.6 C (105.1 F)
191537.2 C (99.0 F)
191636.7 C (98.1 F)
191736.7 C (98.1 F)
191840.6 C (105.1 F)
191940.6 C (105.1 F)
192037.2 C (99.0 F)
192140.6 C (105.1 F)
192239.4 C (102.9 F)
192337.8 C (100.0 F)
192441.1 C (106.0 F)
192543.3 C (109.9 F)
192638.9 C (102.0 F)
192729.4 C (84.9 F)
1940n/a
1941n/a
1942n/a
1943n/a
1944n/a
1945n/a
1946n/a
1947n/a
1948n/a
1949n/a
1950n/a
1951n/a
1952n/a
1953n/a
1954n/a
1955n/a
1956n/a
1957n/a
1958n/a
1959n/a
1960n/a
1961n/a
1962n/a
1963n/a
1964n/a
1965n/a
1966n/a
1967n/a
1968n/a
1969n/a
1970n/a
1971n/a
1972n/a
1973n/a
1974n/a
1975n/a
1976n/a
1977n/a
1978n/a
1979n/a
1980n/a
1981n/a
1982n/a
1983n/a
1984n/a
1985n/a
1986n/a

Coldest night (TNn)

Coldest night (TNn) at Okolona by year The coldest night of the year at Okolona, 1893 to 1986. The record is -21.1 C (-6.0 F) in 1918, marked on the chart; the median year is -11.7 C (10.9 F). -25-20-15-10-519001920194019601980Record: -21.1 C (-6.0 F) in 1918
The coldest night of the year at Okolona, 1893 to 1986. The record is -21.1 C (-6.0 F) in 1918, marked on the chart; the median year is -11.7 C (10.9 F).
Coldest night (TNn) at Okolona by year
YearColdest night (TNn)
1893-12.2 C (10.0 F)
1894-6.7 C (19.9 F)
1895-16.1 C (3.0 F)
1896-11.7 C (10.9 F)
1897-13.3 C (8.1 F)
1898-12.8 C (9.0 F)
1899-12.8 C (9.0 F)
1900-12.2 C (10.0 F)
1901-16.1 C (3.0 F)
1902-10.6 C (12.9 F)
1903-14.4 C (6.1 F)
1904-10.6 C (12.9 F)
1905-13.9 C (7.0 F)
1906-6.7 C (19.9 F)
1907-6.7 C (19.9 F)
1908-10.6 C (12.9 F)
1909-10.6 C (12.9 F)
1910-11.1 C (12.0 F)
1911-14.4 C (6.1 F)
1912-17.2 C (1.0 F)
1913-6.7 C (19.9 F)
1914-11.1 C (12.0 F)
1915-6.7 C (19.9 F)
1916-11.7 C (10.9 F)
1917-15.0 C (5.0 F)
1918-21.1 C (-6.0 F)
1919-13.3 C (8.1 F)
1920-9.4 C (15.1 F)
1921-8.3 C (17.1 F)
1922-8.3 C (17.1 F)
1923-11.7 C (10.9 F)
1924-15.6 C (3.9 F)
1925-11.7 C (10.9 F)
1926-11.1 C (12.0 F)
1927-14.4 C (6.1 F)
1940n/a
1941n/a
1942n/a
1943n/a
1944n/a
1945n/a
1946n/a
1947n/a
1948n/a
1949n/a
1950n/a
1951n/a
1952n/a
1953n/a
1954n/a
1955n/a
1956n/a
1957n/a
1958n/a
1959n/a
1960n/a
1961n/a
1962n/a
1963n/a
1964n/a
1965n/a
1966n/a
1967n/a
1968n/a
1969n/a
1970n/a
1971n/a
1972n/a
1973n/a
1974n/a
1975n/a
1976n/a
1977n/a
1978n/a
1979n/a
1980n/a
1981n/a
1982n/a
1983n/a
1984n/a
1985n/a
1986n/a

Wettest day (Rx1day)

Wettest day (Rx1day) at Okolona by year The wettest day of the year at Okolona, 1893 to 1986. The record is 254.0 mm (10.0 in) in 1951, marked on the chart; the median year is 76.2 mm (3.0 in). 010020030019001920194019601980Record: 254.0 mm (10.0 in) in 1951
The wettest day of the year at Okolona, 1893 to 1986. The record is 254.0 mm (10.0 in) in 1951, marked on the chart; the median year is 76.2 mm (3.0 in).
Wettest day (Rx1day) at Okolona by year
YearWettest day (Rx1day)
189348.8 mm (1.9 in)
189419.6 mm (0.8 in)
189557.7 mm (2.3 in)
189678.7 mm (3.1 in)
189764.5 mm (2.5 in)
189857.4 mm (2.3 in)
189954.1 mm (2.1 in)
190072.4 mm (2.9 in)
190166.0 mm (2.6 in)
190294.0 mm (3.7 in)
190359.7 mm (2.4 in)
190450.8 mm (2.0 in)
190561.0 mm (2.4 in)
1906101.6 mm (4.0 in)
190792.7 mm (3.6 in)
190891.4 mm (3.6 in)
1909103.6 mm (4.1 in)
191076.2 mm (3.0 in)
1911111.0 mm (4.4 in)
191274.9 mm (2.9 in)
191397.8 mm (3.9 in)
191482.6 mm (3.3 in)
191576.2 mm (3.0 in)
1916121.9 mm (4.8 in)
191761.0 mm (2.4 in)
191852.1 mm (2.1 in)
191954.4 mm (2.1 in)
192063.0 mm (2.5 in)
192160.5 mm (2.4 in)
192253.3 mm (2.1 in)
192359.9 mm (2.4 in)
192462.2 mm (2.4 in)
192594.0 mm (3.7 in)
192659.7 mm (2.4 in)
192754.6 mm (2.1 in)
194071.1 mm (2.8 in)
194144.7 mm (1.8 in)
1942101.6 mm (4.0 in)
194350.8 mm (2.0 in)
194453.3 mm (2.1 in)
194572.4 mm (2.9 in)
1946132.1 mm (5.2 in)
194763.5 mm (2.5 in)
194876.2 mm (3.0 in)
1949119.4 mm (4.7 in)
195083.8 mm (3.3 in)
1951254.0 mm (10.0 in)
195250.8 mm (2.0 in)
195358.4 mm (2.3 in)
195489.7 mm (3.5 in)
195589.2 mm (3.5 in)
195680.3 mm (3.2 in)
1957130.0 mm (5.1 in)
195887.1 mm (3.4 in)
195965.0 mm (2.6 in)
196085.1 mm (3.4 in)
1961136.1 mm (5.4 in)
196263.2 mm (2.5 in)
196383.8 mm (3.3 in)
196478.5 mm (3.1 in)
196550.8 mm (2.0 in)
196690.2 mm (3.6 in)
196785.6 mm (3.4 in)
196857.2 mm (2.3 in)
1969132.6 mm (5.2 in)
1970105.9 mm (4.2 in)
197178.7 mm (3.1 in)
197281.0 mm (3.2 in)
1973152.9 mm (6.0 in)
197463.5 mm (2.5 in)
1975125.2 mm (4.9 in)
1976102.1 mm (4.0 in)
197785.3 mm (3.4 in)
197882.0 mm (3.2 in)
197994.5 mm (3.7 in)
1980101.6 mm (4.0 in)
198174.9 mm (2.9 in)
1982138.9 mm (5.5 in)
1983142.2 mm (5.6 in)
198461.5 mm (2.4 in)
198559.7 mm (2.4 in)
198648.5 mm (1.9 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Okolona by year The wettest five days of the year at Okolona, 1893 to 1986. The record is 382.8 mm (15.1 in) in 1951, marked on the chart; the median year is 118.6 mm (4.7 in). 010020030040019001920194019601980Record: 382.8 mm (15.1 in) in 1951
The wettest five days of the year at Okolona, 1893 to 1986. The record is 382.8 mm (15.1 in) in 1951, marked on the chart; the median year is 118.6 mm (4.7 in).
Wettest five days (Rx5day) at Okolona by year
YearWettest five days (Rx5day)
189361.3 mm (2.4 in)
189420.4 mm (0.8 in)
189589.5 mm (3.5 in)
1896157.2 mm (6.2 in)
1897105.7 mm (4.2 in)
1898101.1 mm (4.0 in)
189979.2 mm (3.1 in)
1900143.5 mm (5.6 in)
1901105.4 mm (4.1 in)
1902160.9 mm (6.3 in)
190385.1 mm (3.4 in)
190487.7 mm (3.5 in)
1905112.4 mm (4.4 in)
1906157.6 mm (6.2 in)
190792.7 mm (3.6 in)
1908134.6 mm (5.3 in)
1909122.6 mm (4.8 in)
1910148.7 mm (5.9 in)
1911147.9 mm (5.8 in)
1912172.6 mm (6.8 in)
1913114.5 mm (4.5 in)
1914125.8 mm (5.0 in)
1915100.4 mm (4.0 in)
1916223.6 mm (8.8 in)
1917113.1 mm (4.5 in)
191866.8 mm (2.6 in)
191996.7 mm (3.8 in)
1920109.7 mm (4.3 in)
1921102.4 mm (4.0 in)
1922129.7 mm (5.1 in)
1923113.5 mm (4.5 in)
192491.1 mm (3.6 in)
1925135.1 mm (5.3 in)
1926165.6 mm (6.5 in)
192775.9 mm (3.0 in)
1940102.4 mm (4.0 in)
194179.8 mm (3.1 in)
1942101.6 mm (4.0 in)
1943101.6 mm (4.0 in)
194478.8 mm (3.1 in)
1945108.0 mm (4.3 in)
1946179.8 mm (7.1 in)
1947102.8 mm (4.0 in)
1948127.0 mm (5.0 in)
1949233.7 mm (9.2 in)
1950157.6 mm (6.2 in)
1951382.8 mm (15.1 in)
195287.7 mm (3.5 in)
195395.2 mm (3.7 in)
1954105.4 mm (4.1 in)
1955152.0 mm (6.0 in)
1956144.8 mm (5.7 in)
1957195.6 mm (7.7 in)
1958145.3 mm (5.7 in)
195992.2 mm (3.6 in)
196092.5 mm (3.6 in)
1961221.4 mm (8.7 in)
1962117.3 mm (4.6 in)
1963127.7 mm (5.0 in)
1964129.1 mm (5.1 in)
1965161.7 mm (6.4 in)
1966107.2 mm (4.2 in)
1967111.0 mm (4.4 in)
1968148.5 mm (5.8 in)
1969159.8 mm (6.3 in)
1970159.8 mm (6.3 in)
1971110.5 mm (4.4 in)
1972140.2 mm (5.5 in)
1973219.7 mm (8.6 in)
1974119.9 mm (4.7 in)
1975176.1 mm (6.9 in)
1976120.9 mm (4.8 in)
1977161.7 mm (6.4 in)
1978129.0 mm (5.1 in)
1979155.8 mm (6.1 in)
1980159.8 mm (6.3 in)
198198.3 mm (3.9 in)
1982259.5 mm (10.2 in)
1983178.1 mm (7.0 in)
1984109.8 mm (4.3 in)
198582.1 mm (3.2 in)
198672.2 mm (2.8 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Okolona by year The longest dry spell of the year at Okolona, 1893 to 1986. The record is 58 days in 1904, marked on the chart; the median year is 24 days. 020406019001920194019601980Record: 58 days in 1904
The longest dry spell of the year at Okolona, 1893 to 1986. The record is 58 days in 1904, marked on the chart; the median year is 24 days.
Longest dry spell (CDD) at Okolona by year
YearLongest dry spell (CDD)
189315 days
189416 days
189515 days
189623 days
189750 days
189822 days
189943 days
190018 days
190124 days
190232 days
190348 days
190458 days
190533 days
190638 days
190734 days
190831 days
190927 days
191024 days
191129 days
191220 days
191320 days
191424 days
191532 days
191620 days
191719 days
191824 days
191914 days
192031 days
192124 days
192225 days
192326 days
192441 days
192532 days
192622 days
192713 days
194028 days
194135 days
194227 days
194327 days
194426 days
194518 days
194629 days
194722 days
194819 days
194920 days
195024 days
195127 days
195230 days
195343 days
195430 days
19559 days
195618 days
195733 days
195827 days
195911 days
196010 days
196130 days
196221 days
196334 days
196421 days
196515 days
196625 days
196717 days
196822 days
196921 days
197025 days
197121 days
197220 days
197315 days
197417 days
197517 days
197617 days
197715 days
197824 days
197914 days
198024 days
198123 days
198220 days
198320 days
198425 days
198517 days
198626 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

24 years with a frost

Across 24 years with a frost, the median last spring frost at Okolona falls on 29 March and the median first autumn frost on 5 November, which leaves a median of 223 days between them.

Frost dates and growing season at Okolona
MeasureMedian, all yearsEarliest periodRecent period (1900 to 1926)Recent against earliestFitted trend
Last spring frost29 Marchn/a29 Marchn/an/a
First autumn frost5 Novembern/a5 Novembern/an/a
Growing days223 daysn/a223 daysn/an/a

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

64 years, 1898 to 1985

A day with at least 77.9 mm (3.1 in) of rain is expected about once in 2 years. A day with at least 213.5 mm (8.4 in) of rain is expected about once in 100 years.

Rainfall return levels at Okolona: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years77.9 mm (3.1 in)
5 years104.5 mm (4.1 in)
10 years125.5 mm (4.9 in)
25 years156.5 mm (6.2 in)
50 years183.3 mm (7.2 in)
100 years213.5 mm (8.4 in)Longer than the 64 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, 64 years of values from 1898 to 1985.

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: 254.0 mm (10.0 in) in 1951; 152.9 mm (6.0 in) in 1973; 142.2 mm (5.6 in) in 1983.

Download the Data

  • Data for Okolona standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Okolona 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).