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Built 2026-10-19 (19 October 2026)

Ukiah 4 WSW Threshold Days by Year (USC00049124)

6 fixed thresholds counted per year at Ukiah 4 WSW (USC00049124): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Ukiah 4 WSW Thresholds

  • Ukiah 4 WSW: days with 10 mm (0.39 in) or more of precipitation in 47 years, most in 1983 with 77.
  • Ukiah 4 WSW: days with 25 mm (0.98 in) or more of precipitation in 47 years, most in 1983 with 37.
  • Ukiah 4 WSW: days with 50 mm (1.97 in) or more of precipitation in 45 years, most in 1983 with 13.
  • Ukiah 4 WSW: days with 10 cm (3.9 in) or more of snowfall in 20 years, most in 1964 with 5.
  • 6 fixed thresholds have at least one qualifying day at Ukiah 4 WSW.
47 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Ukiah 4 WSW Days per year at Ukiah 4 WSW with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 77 in 1983. 0204060801952: 481953: 361954: 481963: 461964: 411965: 351966: 331967: 371968: 411969: 411970: 441971: 351972: 431973: 531974: 331975: 381976: 201977: 261978: 341979: 421980: 281981: 441982: 471983: 771984: 351985: 241986: 411987: 371988: 281989: 261990: 291991: 301992: 441993: 401994: 311995: 551996: 581997: 391998: 601999: 382000: 372001: 472002: 312003: 402004: 302005: 502006: 511952196519701975198019851990199520002005
Days per year at Ukiah 4 WSW with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 77 in 1983.
Days with 10 mm (0.39 in) or more of precipitation per year at Ukiah 4 WSW
YearDaysDecade average
19524844
19533644
19544844
19634639.1
19644139.1
19653539.1
19663339.1
19673739.1
19684139.1
19694139.1
19704436.8
19713536.8
19724336.8
19735336.8
19743336.8
19753836.8
19762036.8
19772636.8
19783436.8
19794236.8
19802838.7
19814438.7
19824738.7
19837738.7
19843538.7
19852438.7
19864138.7
19873738.7
19882838.7
19892638.7
19902942.4
19913042.4
19924442.4
19934042.4
19943142.4
19955542.4
19965842.4
19973942.4
19986042.4
19993842.4
20003740.9
20014740.9
20023140.9
20034040.9
20043040.9
20055040.9
20065140.9
First to last qualifying date each year at Ukiah 4 WSW For each year, a bar from the first to the last day at Ukiah 4 WSW meeting 10 mm (0.39 in). 1952: 6 January 1952 to 30 December 19521953: 1 January 1953 to 20 December 19531954: 3 January 1954 to 31 December 19541963: 30 January 1963 to 20 December 19631964: 14 January 1964 to 31 December 19641965: 3 January 1965 to 31 December 19651966: 3 January 1966 to 14 December 19661967: 20 January 1967 to 18 December 19671968: 10 January 1968 to 26 December 19681969: 11 January 1969 to 24 December 19691970: 9 January 1970 to 29 December 19701971: 2 January 1971 to 27 December 19711972: 21 January 1972 to 28 December 19721973: 8 January 1973 to 29 December 19731974: 3 January 1974 to 28 December 19741975: 4 January 1975 to 22 December 19751976: 9 January 1976 to 30 December 19761977: 2 January 1977 to 27 December 19771978: 2 January 1978 to 1 December 19781979: 4 January 1979 to 31 December 19791980: 10 January 1980 to 22 December 19801981: 16 January 1981 to 30 December 19811982: 1 January 1982 to 23 December 19821983: 18 January 1983 to 30 December 19831984: 16 January 1984 to 26 December 19841985: 7 February 1985 to 7 December 19851986: 4 January 1986 to 31 December 19861987: 1 January 1987 to 29 December 19871988: 3 January 1988 to 31 December 19881989: 5 January 1989 to 26 November 19891990: 2 January 1990 to 19 December 19901991: 7 January 1991 to 29 December 19911992: 5 January 1992 to 31 December 19921993: 1 January 1993 to 14 December 19931994: 5 January 1994 to 28 December 19941995: 3 January 1995 to 30 December 19951996: 15 January 1996 to 31 December 19961997: 1 January 1997 to 15 December 19971998: 2 January 1998 to 14 December 19981999: 16 January 1999 to 9 December 19992000: 11 January 2000 to 15 December 20002001: 8 January 2001 to 31 December 20012002: 1 January 2002 to 31 December 20022003: 13 January 2003 to 30 December 20032004: 1 January 2004 to 31 December 20042005: 1 January 2005 to 31 December 20052006: 1 January 2006 to 27 December 200619521966197219781984199019962002JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Ukiah 4 WSW meeting 10 mm (0.39 in).
First to last qualifying date each year at Ukiah 4 WSW
YearFirst dateLast date
19521952-01-061952-12-30
19531953-01-011953-12-20
19541954-01-031954-12-31
19631963-01-301963-12-20
19641964-01-141964-12-31
19651965-01-031965-12-31
19661966-01-031966-12-14
19671967-01-201967-12-18
19681968-01-101968-12-26
19691969-01-111969-12-24
19701970-01-091970-12-29
19711971-01-021971-12-27
19721972-01-211972-12-28
19731973-01-081973-12-29
19741974-01-031974-12-28
19751975-01-041975-12-22
19761976-01-091976-12-30
19771977-01-021977-12-27
19781978-01-021978-12-01
19791979-01-041979-12-31
19801980-01-101980-12-22
19811981-01-161981-12-30
19821982-01-011982-12-23
19831983-01-181983-12-30
19841984-01-161984-12-26
19851985-02-071985-12-07
19861986-01-041986-12-31
19871987-01-011987-12-29
19881988-01-031988-12-31
19891989-01-051989-11-26
19901990-01-021990-12-19
19911991-01-071991-12-29
19921992-01-051992-12-31
19931993-01-011993-12-14
19941994-01-051994-12-28
19951995-01-031995-12-30
19961996-01-151996-12-31
19971997-01-011997-12-15
19981998-01-021998-12-14
19991999-01-161999-12-09
20002000-01-112000-12-15
20012001-01-082001-12-31
20022002-01-012002-12-31
20032003-01-132003-12-30
20042004-01-012004-12-31
20052005-01-012005-12-31
20062006-01-012006-12-27

Every Fixed Threshold

Fixed thresholds at Ukiah 4 WSW
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain4777198351
25 mm (0.98 in): Days with 25 mm or more rain4737198319
50 mm (1.97 in): Days with 50 mm or more rain451319833
100 mm (3.94 in): Days with 100 mm or more rain16219641
10 cm (3.9 in): Days with 10 cm or more snowfall20519641
25 cm (9.8 in): Days with 25 cm or more snowfall6119521

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1952.

Download the Data

  • Data for Ukiah 4 WSW 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).