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Data as of 2025-12-31
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Built 2026-10-18 (18 October 2026)

Wilton Threshold Days by Year

17 fixed thresholds counted per year at Wilton (USC00329455): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Wilton Thresholds

  • Wilton: days with 10 mm (0.39 in) or more of precipitation in 59 years, most in 1993 with 29.
  • Wilton: days with 25 mm (0.98 in) or more of precipitation in 56 years, most in 1993 with 8.
  • Wilton: days with a maximum temperature at or above 30 C (86 F) in 48 years, most in 1961 with 58.
  • Wilton: days with a maximum temperature at or below 0 C (32 F) in 48 years, most in 1950 with 120.
  • 17 fixed thresholds have at least one qualifying day at Wilton.
48 years with a qualifying day
Days at or above 30 C (86 F) per year at Wilton Days per year at Wilton with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 58 in 1961. 02040601927: 211928: 231929: 431930: 411940: 391941: 331942: 101943: 81944: 71945: 151946: 181947: 261948: 331949: 311950: 151951: 141952: 311954: 181955: 371958: 391959: 531960: 431961: 581962: 151963: 281966: 281967: 301968: 101969: 291970: 371971: 191972: 251975: 161978: 291981: 171983: 361984: 301985: 121986: 141987: 281990: 291991: 281993: 62006: 292007: 182008: 112009: 12010: 121927194119461951195919661971198319902008
Days per year at Wilton with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 58 in 1961.
Days at or above 30 C (86 F) per year at Wilton
YearDaysDecade average
19272129
19282329
19294329
19304141
19403922
19413322
19421022
1943822
1944722
19451522
19461822
19472622
19483322
19493122
19501529.6
19511429.6
19523129.6
19541829.6
19553729.6
19583929.6
19595329.6
19604330.1
19615830.1
19621530.1
19632830.1
19662830.1
19673030.1
19681030.1
19692930.1
19703725.2
19711925.2
19722525.2
19751625.2
19782925.2
19811722.8
19833622.8
19843022.8
19851222.8
19861422.8
19872822.8
19902921
19912821
1993621
20062914.8
20071814.8
20081114.8
2009114.8
20101212
First to last qualifying date each year at Wilton For each year, a bar from the first to the last day at Wilton meeting 30 C (86 F). 1927: 27 June 1927 to 13 September 19271928: 7 May 1928 to 21 September 19281929: 9 June 1929 to 1 September 19291930: 20 May 1930 to 18 September 19301940: 11 May 1940 to 21 September 19401941: 18 May 1941 to 20 September 19411942: 9 July 1942 to 11 September 19421943: 29 May 1943 to 7 August 19431944: 13 May 1944 to 12 August 19441945: 21 June 1945 to 5 September 19451946: 15 June 1946 to 15 September 19461947: 3 July 1947 to 7 September 19471948: 19 May 1948 to 16 September 19481949: 4 May 1949 to 6 October 19491950: 6 June 1950 to 7 September 19501951: 16 June 1951 to 24 August 19511952: 27 April 1952 to 28 September 19521954: 13 June 1954 to 1 September 19541955: 2 May 1955 to 17 September 19551958: 11 May 1958 to 13 October 19581959: 3 June 1959 to 13 September 19591960: 13 May 1960 to 4 October 19601961: 30 May 1961 to 31 August 19611962: 24 April 1962 to 7 September 19621963: 29 June 1963 to 4 October 19631966: 22 May 1966 to 13 September 19661967: 23 May 1967 to 6 September 19671968: 3 June 1968 to 15 September 19681969: 15 May 1969 to 14 September 19691970: 18 May 1970 to 20 September 19701971: 17 July 1971 to 3 September 19711972: 17 May 1972 to 20 September 19721975: 26 June 1975 to 29 August 19751978: 29 June 1978 to 11 September 19781981: 28 June 1981 to 13 September 19811983: 11 June 1983 to 8 September 19831984: 17 May 1984 to 19 September 19841985: 4 May 1985 to 9 August 19851986: 5 May 1986 to 20 August 19861987: 19 April 1987 to 15 September 19871990: 22 April 1990 to 13 September 19901991: 5 July 1991 to 8 September 19911993: 13 May 1993 to 24 August 19932006: 28 May 2006 to 24 August 20062007: 8 July 2007 to 2 October 20072008: 2 July 2008 to 19 September 20082009: 24 July 2009 to 24 July 20092010: 29 May 2010 to 28 August 201019271942194819551963197119841993JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Wilton meeting 30 C (86 F).
First to last qualifying date each year at Wilton
YearFirst dateLast date
19271927-06-271927-09-13
19281928-05-071928-09-21
19291929-06-091929-09-01
19301930-05-201930-09-18
19401940-05-111940-09-21
19411941-05-181941-09-20
19421942-07-091942-09-11
19431943-05-291943-08-07
19441944-05-131944-08-12
19451945-06-211945-09-05
19461946-06-151946-09-15
19471947-07-031947-09-07
19481948-05-191948-09-16
19491949-05-041949-10-06
19501950-06-061950-09-07
19511951-06-161951-08-24
19521952-04-271952-09-28
19541954-06-131954-09-01
19551955-05-021955-09-17
19581958-05-111958-10-13
19591959-06-031959-09-13
19601960-05-131960-10-04
19611961-05-301961-08-31
19621962-04-241962-09-07
19631963-06-291963-10-04
19661966-05-221966-09-13
19671967-05-231967-09-06
19681968-06-031968-09-15
19691969-05-151969-09-14
19701970-05-181970-09-20
19711971-07-171971-09-03
19721972-05-171972-09-20
19751975-06-261975-08-29
19781978-06-291978-09-11
19811981-06-281981-09-13
19831983-06-111983-09-08
19841984-05-171984-09-19
19851985-05-041985-08-09
19861986-05-051986-08-20
19871987-04-191987-09-15
19901990-04-221990-09-13
19911991-07-051991-09-08
19931993-05-131993-08-24
20062006-05-282006-08-24
20072007-07-082007-10-02
20082008-07-022008-09-19
20092009-07-242009-07-24
20102010-05-292010-08-28

Every Fixed Threshold

Fixed thresholds at Wilton
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days4858196112
35 C (95 F): Days391719301
40 C (104 F): Days5219612
90 F (32.2 C): Days453819616
100 F (37.8 C): Days16719291
0 C (32 F): Ice days (max481201950108
0 C (32 F): Frost days (min452091945172
-10 C (14 F): Days with min45127195185
-20 C (-4 F): Days with min4570195131
-30 C (-22 F): Days with min412019513
20 C (68 F): Tropical nights (min18419411
10 mm (0.39 in): Days with 10 mm or more rain5929199324
25 mm (0.98 in): Days with 25 mm or more rain56819935
50 mm (1.97 in): Days with 50 mm or more rain17219511
100 mm (3.94 in): Days with 100 mm or more rain2119511
10 cm (3.9 in): Days with 10 cm or more snowfall44820108
25 cm (9.8 in): Days with 25 cm or more snowfall7219501

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1927.

Download the Data

  • Data for Wilton 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).