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Built 2026-10-19 (19 October 2026)

Rison Threshold Days by Year (USC00036174)

18 fixed thresholds counted per year at Rison (USC00036174): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Rison Thresholds

  • Rison: days with 10 mm (0.39 in) or more of precipitation in 39 years, most in 1957 with 50.
  • Rison: days with 25 mm (0.98 in) or more of precipitation in 39 years, most in 1923 with 26.
  • Rison: days with 50 mm (1.97 in) or more of precipitation in 37 years, most in 2015 with 11.
  • Rison: nights with a minimum temperature at or below 0 C (32 F) in 34 years, most in 1895 with 84.
  • 18 fixed thresholds have at least one qualifying day at Rison.
25 years with a qualifying day
Days at or above 30 C (86 F) per year at Rison Days per year at Rison with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 142 in 1925. 0501001501894: 1101895: 1081896: 1091897: 1411898: 1361899: 1141900: 1201920: 1221921: 1361922: 1331923: 951924: 1161925: 1421928: 1161929: 1381930: 1321931: 1301932: 1271933: 1422010: 1342014: 792015: 1012016: 1042017: 822018: 126189418971900192219251930193320152018
Days per year at Rison with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 142 in 1925.
Days at or above 30 C (86 F) per year at Rison
YearDaysDecade average
1894110119.7
1895108119.7
1896109119.7
1897141119.7
1898136119.7
1899114119.7
1900120120
1920122124.8
1921136124.8
1922133124.8
192395124.8
1924116124.8
1925142124.8
1928116124.8
1929138124.8
1930132132.8
1931130132.8
1932127132.8
1933142132.8
2010134104.3
201479104.3
2015101104.3
2016104104.3
201782104.3
2018126104.3
First to last qualifying date each year at Rison For each year, a bar from the first to the last day at Rison meeting 30 C (86 F). 1894: 16 April 1894 to 19 October 18941895: 14 April 1895 to 26 September 18951896: 22 April 1896 to 2 October 18961897: 8 May 1897 to 24 October 18971898: 18 March 1898 to 4 November 18981899: 26 April 1899 to 22 October 18991900: 13 March 1900 to 4 October 19001920: 16 April 1920 to 22 October 19201921: 14 March 1921 to 24 October 19211922: 6 April 1922 to 15 October 19221923: 22 May 1923 to 14 October 19231924: 15 April 1924 to 19 October 19241925: 12 April 1925 to 6 October 19251928: 26 March 1928 to 15 October 19281929: 23 March 1929 to 19 October 19291930: 5 April 1930 to 11 October 19301931: 12 April 1931 to 27 October 19311932: 28 April 1932 to 26 October 19321933: 14 March 1933 to 31 October 19332010: 3 May 2010 to 27 October 20102014: 4 May 2014 to 10 October 20142015: 29 May 2015 to 15 October 20152016: 15 March 2016 to 17 October 20162017: 21 March 2017 to 14 October 20172018: 6 May 2018 to 8 October 20181894189819211925193120142018JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Rison meeting 30 C (86 F).
First to last qualifying date each year at Rison
YearFirst dateLast date
18941894-04-161894-10-19
18951895-04-141895-09-26
18961896-04-221896-10-02
18971897-05-081897-10-24
18981898-03-181898-11-04
18991899-04-261899-10-22
19001900-03-131900-10-04
19201920-04-161920-10-22
19211921-03-141921-10-24
19221922-04-061922-10-15
19231923-05-221923-10-14
19241924-04-151924-10-19
19251925-04-121925-10-06
19281928-03-261928-10-15
19291929-03-231929-10-19
19301930-04-051930-10-11
19311931-04-121931-10-27
19321932-04-281932-10-26
19331933-03-141933-10-31
20102010-05-032010-10-27
20142014-05-042014-10-10
20152015-05-292015-10-15
20162016-03-152016-10-17
20172017-03-212017-10-14
20182018-05-062018-10-08

Every Fixed Threshold

Fixed thresholds at Rison
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days251421925126
35 C (95 F): Days2579192518
40 C (104 F): Days112219303
45 C (113 F): Days1119301
90 F (32.2 C): Days25118192584
100 F (37.8 C): Days195519302
110 F (43.3 C): Days1219302
0 C (32 F): Ice days (max19719323
0 C (32 F): Frost days (min3484189556
-10 C (14 F): Days with min221018995
-20 C (-4 F): Days with min2218991
20 C (68 F): Tropical nights (min341231900118
25 C (77 F): Days with min291820102
10 mm (0.39 in): Days with 10 mm or more rain3950195732
25 mm (0.98 in): Days with 25 mm or more rain3926192325
50 mm (1.97 in): Days with 50 mm or more rain3711201510
100 mm (3.94 in): Days with 100 mm or more rain13320162
10 cm (3.9 in): Days with 10 cm or more snowfall3120151

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1894.

Download the Data

  • Data for Rison 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). Threshold counts are computed by this site.

Data as of . Last revised (2025-12-31).