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Data as of 2025-12-31
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Built 2026-10-14 (14 October 2026)

Ukiah 4 WSW Weather Records (USC00049124)

Record envelope, standing records and threshold days for Ukiah 4 WSW (USC00049124), California, United States, with 72 years of record.

Key Facts for Ukiah 4 WSW

  • Ukiah 4 WSW (USC00049124) is a weather station in California, United States at 39.13 latitude and -123.27 longitude, 405 m (1,328 ft) above sea level.
  • The station reports from 1951 to 2022, 72 years of record.
  • 0 records set at Ukiah 4 WSW still stand.
  • Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Ukiah 4 WSW set a daily record precipitation of 1.0 mm (0.04 in) on 6 July 2022.

About the Station

  • Location: California, United States, 39.13 latitude, -123.27 longitude.
  • Elevation: 405 m (1,328 ft).
  • Period of record: 1951 to 2022, 72 years.
  • Eligible elements: prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Ukiah 4 WSW, with 2026 drawn through them The band shows the record high and record low for each calendar day at Ukiah 4 WSW. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 000111 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Ukiah 4 WSW. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Ukiah 4 WSW, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
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Which Years Hold Standing Records

0 standing records
Standing records at Ukiah 4 WSW by the year they were set 0 records at Ukiah 4 WSW still stand. 00000000000
0 records at Ukiah 4 WSW still stand.
Standing records at Ukiah 4 WSW by the year they were set
Year setStanding records

Wettest Day of Each Month

Apr: 183.1 mm (7.2 in)
Record daily precipitation for each month at Ukiah 4 WSW The wettest day on record for each calendar month at Ukiah 4 WSW. The most was 183.1 mm (7.2 in) on 1 April 1982. 050100150200 Jan: 119.4 mm (4.7 in), 17 January 1954 Jan Feb: 120.1 mm (4.7 in), 17 February 1986 Feb Mar: 111.8 mm (4.4 in), 31 March 1982 Mar Apr: 183.1 mm (7.2 in), 1 April 1982 Apr May: 59.4 mm (2.3 in), 17 May 2019 May Jun: 32.5 mm (1.3 in), 9 June 2005 Jun Jul: 27.4 mm (1.1 in), 8 July 1974 Jul Aug: 37.8 mm (1.5 in), 28 August 1954 Aug Sep: 52.6 mm (2.1 in), 19 September 1977 Sep Oct: 118.1 mm (4.6 in), 28 October 1981 Oct Nov: 82.8 mm (3.3 in), 30 November 2012 Nov Dec: 175.3 mm (6.9 in), 23 December 1964 Dec
The wettest day on record for each calendar month at Ukiah 4 WSW. The most was 183.1 mm (7.2 in) on 1 April 1982.
Record daily precipitation for each month at Ukiah 4 WSW
MonthRecord daily precipitation (mm)Date
Jan119.4 mm (4.7 in)17 January 1954
Feb120.1 mm (4.7 in)17 February 1986
Mar111.8 mm (4.4 in)31 March 1982
Apr183.1 mm (7.2 in)1 April 1982
May59.4 mm (2.3 in)17 May 2019
Jun32.5 mm (1.3 in)9 June 2005
Jul27.4 mm (1.1 in)8 July 1974
Aug37.8 mm (1.5 in)28 August 1954
Sep52.6 mm (2.1 in)19 September 1977
Oct118.1 mm (4.6 in)28 October 1981
Nov82.8 mm (3.3 in)30 November 2012
Dec175.3 mm (6.9 in)23 December 1964

Latest Records

20
Latest records at Ukiah 4 WSW
DateStationRecordValueBeat old record byOld record stoodSignificance
6 July 2022Ukiah 4 WSW, USdaily rain1.0 mm (0.04 in)1.0 mm (0.04 in)69 years20 of 100 (Routine)
12 June 2022Ukiah 4 WSW, USdaily rain (Tie)1.0 mm (0.04 in)tie24 years3 of 100 (Routine)
5 June 2022Ukiah 4 WSW, USdaily rain22.6 mm (0.9 in)1.5 mm (0.06 in)28 years17 of 100 (Routine)
9 May 2022Ukiah 4 WSW, USdaily rain20.6 mm (0.8 in)14.5 mm (0.6 in)41 years20 of 100 (Routine)
15 April 2022Ukiah 4 WSW, USdaily rain24.6 mm (1.0 in)7.3 mm (0.29 in)59 years20 of 100 (Routine)
14 April 2022Ukiah 4 WSW, USdaily rain27.9 mm (1.1 in)6.3 mm (0.25 in)40 years23 of 100 (Routine)
25 October 2021Ukiah 4 WSW, USdaily rain78.0 mm (3.1 in)28.5 mm (1.1 in)11 years27 of 100 (Routine)
24 October 2021Ukiah 4 WSW, USdaily rain103.6 mm (4.1 in)9.6 mm (0.38 in)11 years15 of 100 (Routine)
22 October 2021Ukiah 4 WSW, USdaily rain52.3 mm (2.1 in)17.8 mm (0.7 in)48 years32 of 100 (Routine)
10 August 2019Ukiah 4 WSW, USdaily rain6.4 mm (0.25 in)6.4 mm (0.25 in)68 years20 of 100 (Routine)
19 May 2019Ukiah 4 WSW, USdaily rain34.0 mm (1.3 in)10.4 mm (0.4 in)13 years22 of 100 (Routine)
17 May 2019Ukiah 4 WSW, USmonthly rain59.4 mm (2.3 in)5.8 mm (0.23 in)20 years28 of 100 (Routine)
16 May 2019Ukiah 4 WSW, USdaily rain44.7 mm (1.8 in)25.9 mm (1.0 in)22 years42 of 100 (Notable)
27 February 2019Ukiah 4 WSW, USdaily rain86.6 mm (3.4 in)39.1 mm (1.5 in)4 years29 of 100 (Routine)
26 February 2019Ukiah 4 WSW, USdaily rain97.8 mm (3.9 in)45.2 mm (1.8 in)15 years36 of 100 (Notable)
2 October 2018Ukiah 4 WSW, USdaily rain23.6 mm (0.9 in)1.5 mm (0.06 in)67 years20 of 100 (Routine)
7 April 2018Ukiah 4 WSW, USdaily rain62.5 mm (2.5 in)24.9 mm (1.0 in)0 years25 of 100 (Routine)
3 March 2018Ukiah 4 WSW, USdaily snowfall0.5 cm (0.2 in)0.5 cm (0.2 in)65 years20 of 100 (Routine)
21 February 2018Ukiah 4 WSW, USdaily snowfall0.5 cm (0.2 in)0.5 cm (0.2 in)66 years20 of 100 (Routine)
20 October 2017Ukiah 4 WSW, USdaily rain21.6 mm (0.9 in)2.5 mm (0.10 in)12 years10 of 100 (Routine)

Extremes by Year

1951 to 2022
Yearly extremes at Ukiah 4 WSW: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)183.1 mm (7.2 in)198276.4 mm (3.0 in)66
Wettest five days (Rx5day)459.0 mm (18.1 in)1964190.3 mm (7.5 in)66
Longest dry spell (CDD)169 days200277 days66

Wettest day (Rx1day)

Wettest day (Rx1day) at Ukiah 4 WSW by year The wettest day of the year at Ukiah 4 WSW, 1951 to 2022. The record is 183.1 mm (7.2 in) in 1982, marked on the chart; the median year is 76.4 mm (3.0 in). 0501001502001960198020002020Record: 183.1 mm (7.2 in) in 1982
The wettest day of the year at Ukiah 4 WSW, 1951 to 2022. The record is 183.1 mm (7.2 in) in 1982, marked on the chart; the median year is 76.4 mm (3.0 in).
Wettest day (Rx1day) at Ukiah 4 WSW by year
YearWettest day (Rx1day)
195181.3 mm (3.2 in)
1952107.4 mm (4.2 in)
195383.6 mm (3.3 in)
1954119.4 mm (4.7 in)
195547.0 mm (1.9 in)
1962103.6 mm (4.1 in)
196389.4 mm (3.5 in)
1964175.3 mm (6.9 in)
196565.5 mm (2.6 in)
1966111.3 mm (4.4 in)
1967114.6 mm (4.5 in)
196879.5 mm (3.1 in)
196988.1 mm (3.5 in)
1970111.8 mm (4.4 in)
197178.7 mm (3.1 in)
197271.1 mm (2.8 in)
197367.6 mm (2.7 in)
1974101.6 mm (4.0 in)
197565.0 mm (2.6 in)
197635.6 mm (1.4 in)
197766.5 mm (2.6 in)
197874.9 mm (2.9 in)
197994.0 mm (3.7 in)
1980110.5 mm (4.4 in)
1981118.1 mm (4.6 in)
1982183.1 mm (7.2 in)
198366.8 mm (2.6 in)
198450.8 mm (2.0 in)
1985102.6 mm (4.0 in)
1986120.1 mm (4.7 in)
198762.7 mm (2.5 in)
198869.1 mm (2.7 in)
198959.7 mm (2.4 in)
199072.9 mm (2.9 in)
199173.7 mm (2.9 in)
1992104.4 mm (4.1 in)
1993101.1 mm (4.0 in)
199448.8 mm (1.9 in)
199597.0 mm (3.8 in)
199675.7 mm (3.0 in)
199763.0 mm (2.5 in)
199876.5 mm (3.0 in)
199974.2 mm (2.9 in)
200055.9 mm (2.2 in)
200157.2 mm (2.3 in)
2002115.6 mm (4.6 in)
200360.7 mm (2.4 in)
200492.2 mm (3.6 in)
2005152.4 mm (6.0 in)
200668.6 mm (2.7 in)
200747.0 mm (1.9 in)
200861.0 mm (2.4 in)
200944.5 mm (1.8 in)
201094.0 mm (3.7 in)
201176.2 mm (3.0 in)
201282.8 mm (3.3 in)
201338.6 mm (1.5 in)
2014108.0 mm (4.3 in)
2015120.4 mm (4.7 in)
201666.0 mm (2.6 in)
201768.8 mm (2.7 in)
201862.5 mm (2.5 in)
201997.8 mm (3.9 in)
202036.8 mm (1.4 in)
2021103.6 mm (4.1 in)
202227.9 mm (1.1 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Ukiah 4 WSW by year The wettest five days of the year at Ukiah 4 WSW, 1951 to 2022. The record is 459.0 mm (18.1 in) in 1964, marked on the chart; the median year is 190.3 mm (7.5 in). 02004006001960198020002020Record: 459.0 mm (18.1 in) in 1964
The wettest five days of the year at Ukiah 4 WSW, 1951 to 2022. The record is 459.0 mm (18.1 in) in 1964, marked on the chart; the median year is 190.3 mm (7.5 in).
Wettest five days (Rx5day) at Ukiah 4 WSW by year
YearWettest five days (Rx5day)
1951209.3 mm (8.2 in)
1952217.2 mm (8.6 in)
1953179.7 mm (7.1 in)
1954210.6 mm (8.3 in)
195596.8 mm (3.8 in)
1962217.6 mm (8.6 in)
1963210.9 mm (8.3 in)
1964459.0 mm (18.1 in)
1965202.5 mm (8.0 in)
1966217.0 mm (8.5 in)
1967205.8 mm (8.1 in)
1968187.7 mm (7.4 in)
1969183.5 mm (7.2 in)
1970281.4 mm (11.1 in)
1971163.1 mm (6.4 in)
1972114.1 mm (4.5 in)
1973201.5 mm (7.9 in)
1974157.6 mm (6.2 in)
1975149.7 mm (5.9 in)
197693.7 mm (3.7 in)
1977112.8 mm (4.4 in)
1978224.0 mm (8.8 in)
1979160.3 mm (6.3 in)
1980251.6 mm (9.9 in)
1981176.0 mm (6.9 in)
1982381.5 mm (15.0 in)
1983195.5 mm (7.7 in)
1984156.6 mm (6.2 in)
1985128.5 mm (5.1 in)
1986349.2 mm (13.7 in)
1987150.6 mm (5.9 in)
1988140.0 mm (5.5 in)
1989139.2 mm (5.5 in)
1990132.1 mm (5.2 in)
1991186.7 mm (7.4 in)
1992220.1 mm (8.7 in)
1993214.2 mm (8.4 in)
1994136.2 mm (5.4 in)
1995291.4 mm (11.5 in)
1996197.4 mm (7.8 in)
1997223.6 mm (8.8 in)
1998199.6 mm (7.9 in)
1999153.0 mm (6.0 in)
2000145.3 mm (5.7 in)
2001137.2 mm (5.4 in)
2002296.5 mm (11.7 in)
2003148.8 mm (5.9 in)
2004213.8 mm (8.4 in)
2005270.8 mm (10.7 in)
2006276.9 mm (10.9 in)
2007144.5 mm (5.7 in)
2008122.3 mm (4.8 in)
2009105.2 mm (4.1 in)
2010234.2 mm (9.2 in)
2011151.0 mm (5.9 in)
2012225.3 mm (8.9 in)
201340.4 mm (1.6 in)
2014195.2 mm (7.7 in)
2015192.8 mm (7.6 in)
2016137.9 mm (5.4 in)
2017227.2 mm (8.9 in)
201876.6 mm (3.0 in)
2019197.7 mm (7.8 in)
202058.3 mm (2.3 in)
2021235.7 mm (9.3 in)
202276.9 mm (3.0 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Ukiah 4 WSW by year The longest dry spell of the year at Ukiah 4 WSW, 1951 to 2022. The record is 169 days in 2002, marked on the chart; the median year is 77 days. 0501001502001960198020002020Record: 169 days in 2002
The longest dry spell of the year at Ukiah 4 WSW, 1951 to 2022. The record is 169 days in 2002, marked on the chart; the median year is 77 days.
Longest dry spell (CDD) at Ukiah 4 WSW by year
YearLongest dry spell (CDD)
195141 days
195239 days
195379 days
195477 days
1955123 days
196249 days
1963129 days
196486 days
196557 days
196683 days
1967106 days
196874 days
1969133 days
1970130 days
197165 days
197267 days
1973117 days
197483 days
197551 days
197645 days
197788 days
197863 days
1979116 days
1980104 days
1981108 days
198277 days
198348 days
198484 days
198549 days
1986130 days
198793 days
1988106 days
198953 days
199086 days
199199 days
199291 days
1993125 days
199474 days
199584 days
1996114 days
199750 days
1998117 days
1999141 days
200053 days
200188 days
2002169 days
2003116 days
2004114 days
2005100 days
2006130 days
200728 days
200862 days
200928 days
201031 days
20112 days
20121 day
201324 days
20146 days
20153 days
201662 days
20173 days
20183 days
20192 days
20202 days
202111 days
20222 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Rainfall Return Levels

47 years, 1952 to 2006

A day with at least 81.9 mm (3.2 in) of rain is expected about once in 2 years. A day with at least 192.4 mm (7.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Ukiah 4 WSW: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years81.9 mm (3.2 in)
5 years108.9 mm (4.3 in)
10 years127.8 mm (5.0 in)
25 years152.8 mm (6.0 in)
50 years172.3 mm (6.8 in)Longer than the 47 years of record
100 years192.4 mm (7.6 in)Longer than the 47 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 47 years of values from 1952 to 2006.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 183.1 mm (7.2 in) in 1982; 175.3 mm (6.9 in) in 1964; 152.4 mm (6.0 in) in 2005.

Download the Data

  • Data for Ukiah 4 WSW standing records by year: CSV or JSON. Field meanings are on the data page.
  • 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2025-12-31).