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Data as of 2025-12-31
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Built 2026-10-19 (19 October 2026)

Norwich Exp Farm Threshold Days by Year (USC00136119)

18 fixed thresholds counted per year at Norwich Exp Farm (USC00136119): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Norwich Exp Farm Thresholds

  • Norwich Exp Farm: days with a maximum temperature at or above 30 C (86 F) in 32 years, most in 1956 with 90.
  • Norwich Exp Farm: days with a maximum temperature at or above 90 F (32.2 C) in 32 years, most in 1955 with 55.
  • Norwich Exp Farm: days with a maximum temperature at or below 0 C (32 F) in 32 years, most in 1940 with 65.
  • Norwich Exp Farm: days with 10 mm (0.39 in) or more of precipitation in 32 years, most in 1944 with 40.
  • 18 fixed thresholds have at least one qualifying day at Norwich Exp Farm.
32 years with a qualifying day
Days at or above 30 C (86 F) per year at Norwich Exp Farm Days per year at Norwich Exp Farm with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 90 in 1956. 02550751001938: 711939: 701940: 531941: 631942: 511943: 541944: 591945: 341946: 491947: 671948: 471949: 491950: 271951: 281952: 561953: 791954: 801955: 831956: 901957: 471958: 371959: 501960: 491961: 411962: 571963: 661964: 561965: 321966: 471967: 381968: 621969: 5719381942194619501954195819621966
Days per year at Norwich Exp Farm with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 90 in 1956.
Days at or above 30 C (86 F) per year at Norwich Exp Farm
YearDaysDecade average
19387170.5
19397070.5
19405352.6
19416352.6
19425152.6
19435452.6
19445952.6
19453452.6
19464952.6
19476752.6
19484752.6
19494952.6
19502757.7
19512857.7
19525657.7
19537957.7
19548057.7
19558357.7
19569057.7
19574757.7
19583757.7
19595057.7
19604950.5
19614150.5
19625750.5
19636650.5
19645650.5
19653250.5
19664750.5
19673850.5
19686250.5
19695750.5
First to last qualifying date each year at Norwich Exp Farm For each year, a bar from the first to the last day at Norwich Exp Farm meeting 30 C (86 F). 1938: 2 May 1938 to 16 October 19381939: 23 April 1939 to 24 October 19391940: 12 May 1940 to 25 October 19401941: 14 May 1941 to 20 September 19411942: 28 May 1942 to 30 September 19421943: 29 May 1943 to 5 September 19431944: 14 May 1944 to 3 September 19441945: 20 May 1945 to 23 September 19451946: 31 March 1946 to 26 September 19461947: 14 May 1947 to 21 October 19471948: 18 April 1948 to 31 August 19481949: 25 April 1949 to 8 October 19491950: 22 April 1950 to 17 October 19501951: 31 May 1951 to 3 October 19511952: 2 May 1952 to 30 September 19521953: 24 May 1953 to 18 October 19531954: 24 April 1954 to 3 October 19541955: 18 April 1955 to 11 October 19551956: 1 April 1956 to 12 October 19561957: 4 June 1957 to 1 September 19571958: 11 May 1958 to 24 September 19581959: 1 May 1959 to 8 September 19591960: 22 April 1960 to 11 October 19601961: 20 April 1961 to 10 September 19611962: 5 May 1962 to 15 September 19621963: 8 May 1963 to 14 October 19631964: 16 April 1964 to 16 October 19641965: 22 April 1965 to 9 September 19651966: 5 May 1966 to 14 October 19661967: 16 April 1967 to 25 September 19671968: 1 May 1968 to 3 September 19681969: 28 May 1969 to 4 October 196919381942194619501954195819621966JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Norwich Exp Farm meeting 30 C (86 F).
First to last qualifying date each year at Norwich Exp Farm
YearFirst dateLast date
19381938-05-021938-10-16
19391939-04-231939-10-24
19401940-05-121940-10-25
19411941-05-141941-09-20
19421942-05-281942-09-30
19431943-05-291943-09-05
19441944-05-141944-09-03
19451945-05-201945-09-23
19461946-03-311946-09-26
19471947-05-141947-10-21
19481948-04-181948-08-31
19491949-04-251949-10-08
19501950-04-221950-10-17
19511951-05-311951-10-03
19521952-05-021952-09-30
19531953-05-241953-10-18
19541954-04-241954-10-03
19551955-04-181955-10-11
19561956-04-011956-10-12
19571957-06-041957-09-01
19581958-05-111958-09-24
19591959-05-011959-09-08
19601960-04-221960-10-11
19611961-04-201961-09-10
19621962-05-051962-09-15
19631963-05-081963-10-14
19641964-04-161964-10-16
19651965-04-221965-09-09
19661966-05-051966-10-14
19671967-04-161967-09-25
19681968-05-011968-09-03
19691969-05-281969-10-04

Every Fixed Threshold

Fixed thresholds at Norwich Exp Farm
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3290195657
35 C (95 F): Days283019551
40 C (104 F): Days2319541
90 F (32.2 C): Days3255195523
100 F (37.8 C): Days14819541
0 C (32 F): Ice days (max3265194050
0 C (32 F): Frost days (min301511950139
-10 C (14 F): Days with min3056196043
-20 C (-4 F): Days with min292719634
-30 C (-22 F): Days with min2119401
20 C (68 F): Tropical nights (min3043195425
25 C (77 F): Days with min4719687
10 mm (0.39 in): Days with 10 mm or more rain3240194429
25 mm (0.98 in): Days with 25 mm or more rain3213195113
50 mm (1.97 in): Days with 50 mm or more rain25519582
100 mm (3.94 in): Days with 100 mm or more rain2219582
10 cm (3.9 in): Days with 10 cm or more snowfall18519571
25 cm (9.8 in): Days with 25 cm or more snowfall1119451

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1938.

Download the Data

  • Data for Norwich Exp Farm 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).