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Built 2026-10-19 (19 October 2026)

Norwich 1 E Threshold Days by Year

6 fixed thresholds counted per year at Norwich 1 E (USC00336136): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Norwich 1 E Thresholds

  • Norwich 1 E: days with 10 mm (0.39 in) or more of precipitation in 30 years, most in 1958 with 48.
  • Norwich 1 E: days with 25 mm (0.98 in) or more of precipitation in 30 years, most in 1985 with 13.
  • Norwich 1 E: days with 50 mm (1.97 in) or more of precipitation in 16 years, most in 1963 with 3.
  • Norwich 1 E: days with 10 cm (3.9 in) or more of snowfall in 12 years, most in 1964 with 4.
  • 6 fixed thresholds have at least one qualifying day at Norwich 1 E.
30 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Norwich 1 E Days per year at Norwich 1 E with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 48 in 1958. 02040601949: 261951: 361952: 311953: 281954: 391955: 321956: 471957: 361958: 481959: 481961: 361962: 311963: 241964: 311965: 271966: 281967: 311968: 421969: 251970: 331971: 221972: 311973: 311974: 421975: 371976: 361977: 331978: 371982: 331985: 321949195319561959196319661969197219751978
Days per year at Norwich 1 E with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 48 in 1958.
Days with 10 mm (0.39 in) or more of precipitation per year at Norwich 1 E
YearDaysDecade average
19492626
19513638.3
19523138.3
19532838.3
19543938.3
19553238.3
19564738.3
19573638.3
19584838.3
19594838.3
19613630.6
19623130.6
19632430.6
19643130.6
19652730.6
19662830.6
19673130.6
19684230.6
19692530.6
19703333.6
19712233.6
19723133.6
19733133.6
19744233.6
19753733.6
19763633.6
19773333.6
19783733.6
19823332.5
19853232.5
First to last qualifying date each year at Norwich 1 E For each year, a bar from the first to the last day at Norwich 1 E meeting 10 mm (0.39 in). 1949: 5 January 1949 to 27 December 19491951: 3 January 1951 to 26 December 19511952: 18 January 1952 to 10 December 19521953: 1 January 1953 to 14 December 19531954: 6 January 1954 to 30 December 19541955: 6 February 1955 to 20 November 19551956: 29 January 1956 to 21 December 19561957: 7 January 1957 to 20 December 19571958: 21 January 1958 to 29 November 19581959: 1 January 1959 to 28 December 19591961: 1 January 1961 to 24 December 19611962: 7 January 1962 to 6 December 19621963: 11 January 1963 to 9 December 19631964: 13 January 1964 to 26 December 19641965: 2 January 1965 to 27 November 19651966: 1 January 1966 to 11 December 19661967: 27 January 1967 to 12 December 19671968: 14 January 1968 to 28 December 19681969: 18 January 1969 to 11 December 19691970: 29 January 1970 to 22 December 19701971: 4 January 1971 to 15 December 19711972: 5 January 1972 to 20 December 19721973: 4 January 1973 to 21 December 19731974: 9 January 1974 to 16 December 19741975: 1 January 1975 to 26 December 19751976: 1 January 1976 to 7 December 19761977: 13 March 1977 to 9 December 19771978: 8 January 1978 to 21 December 19781982: 8 February 1982 to 27 December 19821985: 19 January 1985 to 12 December 198519491954195819631967197119751982JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Norwich 1 E meeting 10 mm (0.39 in).
First to last qualifying date each year at Norwich 1 E
YearFirst dateLast date
19491949-01-051949-12-27
19511951-01-031951-12-26
19521952-01-181952-12-10
19531953-01-011953-12-14
19541954-01-061954-12-30
19551955-02-061955-11-20
19561956-01-291956-12-21
19571957-01-071957-12-20
19581958-01-211958-11-29
19591959-01-011959-12-28
19611961-01-011961-12-24
19621962-01-071962-12-06
19631963-01-111963-12-09
19641964-01-131964-12-26
19651965-01-021965-11-27
19661966-01-011966-12-11
19671967-01-271967-12-12
19681968-01-141968-12-28
19691969-01-181969-12-11
19701970-01-291970-12-22
19711971-01-041971-12-15
19721972-01-051972-12-20
19731973-01-041973-12-21
19741974-01-091974-12-16
19751975-01-011975-12-26
19761976-01-011976-12-07
19771977-03-131977-12-09
19781978-01-081978-12-21
19821982-02-081982-12-27
19851985-01-191985-12-12

Every Fixed Threshold

Fixed thresholds at Norwich 1 E
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain3048195832
25 mm (0.98 in): Days with 25 mm or more rain3013198513
50 mm (1.97 in): Days with 50 mm or more rain16319632
100 mm (3.94 in): Days with 100 mm or more rain2119631
10 cm (3.9 in): Days with 10 cm or more snowfall12419641
25 cm (9.8 in): Days with 25 cm or more snowfall1119661

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1949.

Download the Data

  • Data for Norwich 1 E 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).