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Built 2026-10-19 (19 October 2026)

West Hartford Nepp Threshold Days by Year (USC00069162)

6 fixed thresholds counted per year at West Hartford Nepp (USC00069162): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for West Hartford Nepp Thresholds

  • West Hartford Nepp: days with 10 mm (0.39 in) or more of precipitation in 43 years, most in 1983 with 53.
  • West Hartford Nepp: days with 25 mm (0.98 in) or more of precipitation in 43 years, most in 1983 with 32.
  • West Hartford Nepp: days with 50 mm (1.97 in) or more of precipitation in 38 years, most in 1990 with 10.
  • West Hartford Nepp: days with 100 mm (3.94 in) or more of precipitation in 9 years, most in 1979 with 2.
  • 6 fixed thresholds have at least one qualifying day at West Hartford Nepp.
43 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at West Hartford Nepp Days per year at West Hartford Nepp with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 53 in 1983. 02040601949: 301950: 381952: 441953: 441954: 351956: 391957: 341958: 441959: 391960: 461961: 441962: 371963: 351964: 351965: 261966: 311967: 431968: 331969: 391970: 301971: 371974: 421975: 481976: 391977: 511978: 411979: 461980: 301981: 411982: 381983: 531984: 481985: 411986: 401987: 411988: 371989: 511990: 441991: 351993: 401996: 451997: 451999: 36194919561961196619711978198319881996
Days per year at West Hartford Nepp with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 53 in 1983.
Days with 10 mm (0.39 in) or more of precipitation per year at West Hartford Nepp
YearDaysDecade average
19493030
19503839.6
19524439.6
19534439.6
19543539.6
19563939.6
19573439.6
19584439.6
19593939.6
19604636.9
19614436.9
19623736.9
19633536.9
19643536.9
19652636.9
19663136.9
19674336.9
19683336.9
19693936.9
19703041.8
19713741.8
19744241.8
19754841.8
19763941.8
19775141.8
19784141.8
19794641.8
19803042
19814142
19823842
19835342
19844842
19854142
19864042
19874142
19883742
19895142
19904440.8
19913540.8
19934040.8
19964540.8
19974540.8
19993640.8
First to last qualifying date each year at West Hartford Nepp For each year, a bar from the first to the last day at West Hartford Nepp meeting 10 mm (0.39 in). 1949: 1 January 1949 to 27 December 19491950: 6 January 1950 to 30 December 19501952: 3 January 1952 to 12 December 19521953: 3 January 1953 to 15 December 19531954: 22 February 1954 to 19 December 19541956: 10 January 1956 to 23 December 19561957: 23 January 1957 to 27 December 19571958: 1 January 1958 to 29 November 19581959: 2 January 1959 to 29 December 19591960: 3 January 1960 to 30 December 19601961: 1 January 1961 to 29 December 19611962: 7 January 1962 to 30 December 19621963: 13 January 1963 to 24 December 19631964: 2 January 1964 to 28 December 19641965: 24 January 1965 to 26 December 19651966: 3 January 1966 to 30 December 19661967: 8 January 1967 to 29 December 19671968: 15 January 1968 to 23 December 19681969: 31 January 1969 to 27 December 19691970: 3 February 1970 to 24 December 19701971: 5 January 1971 to 30 November 19711974: 10 January 1974 to 17 December 19741975: 7 January 1975 to 31 December 19751976: 8 January 1976 to 21 December 19761977: 8 January 1977 to 22 December 19771978: 9 January 1978 to 25 December 19781979: 3 January 1979 to 26 December 19791980: 12 January 1980 to 29 November 19801981: 3 February 1981 to 23 December 19811982: 2 January 1982 to 17 December 19821983: 6 January 1983 to 28 December 19831984: 11 January 1984 to 28 December 19841985: 13 February 1985 to 12 December 19851986: 5 January 1986 to 25 December 19861987: 2 January 1987 to 16 December 19871988: 4 January 1988 to 29 December 19881989: 22 February 1989 to 31 December 19891990: 1 January 1990 to 29 December 19901991: 14 January 1991 to 30 December 19911993: 5 January 1993 to 22 December 19931996: 10 January 1996 to 19 December 19961997: 16 January 1997 to 30 December 19971999: 4 January 1999 to 21 December 199919491957196319691977198319891999JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at West Hartford Nepp meeting 10 mm (0.39 in).
First to last qualifying date each year at West Hartford Nepp
YearFirst dateLast date
19491949-01-011949-12-27
19501950-01-061950-12-30
19521952-01-031952-12-12
19531953-01-031953-12-15
19541954-02-221954-12-19
19561956-01-101956-12-23
19571957-01-231957-12-27
19581958-01-011958-11-29
19591959-01-021959-12-29
19601960-01-031960-12-30
19611961-01-011961-12-29
19621962-01-071962-12-30
19631963-01-131963-12-24
19641964-01-021964-12-28
19651965-01-241965-12-26
19661966-01-031966-12-30
19671967-01-081967-12-29
19681968-01-151968-12-23
19691969-01-311969-12-27
19701970-02-031970-12-24
19711971-01-051971-11-30
19741974-01-101974-12-17
19751975-01-071975-12-31
19761976-01-081976-12-21
19771977-01-081977-12-22
19781978-01-091978-12-25
19791979-01-031979-12-26
19801980-01-121980-11-29
19811981-02-031981-12-23
19821982-01-021982-12-17
19831983-01-061983-12-28
19841984-01-111984-12-28
19851985-02-131985-12-12
19861986-01-051986-12-25
19871987-01-021987-12-16
19881988-01-041988-12-29
19891989-02-221989-12-31
19901990-01-011990-12-29
19911991-01-141991-12-30
19931993-01-051993-12-22
19961996-01-101996-12-19
19971997-01-161997-12-30
19991999-01-041999-12-21

Every Fixed Threshold

Fixed thresholds at West Hartford Nepp
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain4353198336
25 mm (0.98 in): Days with 25 mm or more rain4332198314
50 mm (1.97 in): Days with 50 mm or more rain381019905
100 mm (3.94 in): Days with 100 mm or more rain9219791
200 mm (7.87 in): Days with 200 mm or more rain1119991
10 cm (3.9 in): Days with 10 cm or more snowfall1319943

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 West Hartford Nepp 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).