Clearlake 4 SE Weather Records (USC00041806)
Record envelope, standing records and threshold days for Clearlake 4 SE (USC00041806), California, United States, with 73 years of record.
Key Facts for Clearlake 4 SE
- Clearlake 4 SE (USC00041806) is a weather station in California, United States at 38.92 latitude and -122.57 longitude, 411 m (1,349 ft) above sea level.
- The station reports from 1954 to 2026, 73 years of record.
- 1,464 records set at Clearlake 4 SE still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Clearlake 4 SE tied a daily record high maximum temperature of 36.7 C (98.1 F) on 6 October 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: California, United States, 38.92 latitude, -122.57 longitude.
- Elevation: 411 m (1,349 ft).
- Period of record: 1954 to 2026, 73 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
17 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 26.7 C (80.1 F) | -13.3 C (8.1 F) | 24.4 C (75.9 F) | -3.9 C (25.0 F) |
| Feb | 27.2 C (81.0 F) | -10.6 C (12.9 F) | 26.7 C (80.1 F) | -6.1 C (21.0 F) |
| Mar | 33.9 C (93.0 F) | -8.3 C (17.1 F) | 33.9 C (93.0 F) | 1.1 C (34.0 F) |
| Apr | 34.4 C (93.9 F) | -5.0 C (23.0 F) | 26.1 C (79.0 F) | 1.7 C (35.1 F) |
| May | 38.3 C (100.9 F) | -2.2 C (28.0 F) | 32.2 C (90.0 F) | 5.0 C (41.0 F) |
| Jun | 45.6 C (114.1 F) | 1.1 C (34.0 F) | 37.8 C (100.0 F) | 7.8 C (46.0 F) |
| Jul | 45.0 C (113.0 F) | 3.9 C (39.0 F) | 37.8 C (100.0 F) | 10.0 C (50.0 F) |
| Aug | 44.4 C (111.9 F) | 4.4 C (39.9 F) | 41.1 C (106.0 F) | 7.2 C (45.0 F) |
| Sep | 45.0 C (113.0 F) | -1.1 C (30.0 F) | 35.0 C (95.0 F) | 6.7 C (44.1 F) |
| Oct | 38.9 C (102.0 F) | -4.4 C (24.1 F) | 36.7 C (98.1 F) | 9.4 C (48.9 F) |
| Nov | 33.3 C (91.9 F) | -7.2 C (19.0 F) | n/a | n/a |
| Dec | 26.1 C (79.0 F) | -14.4 C (6.1 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1954 | 8 |
| 1955 | 59 |
| 1956 | 36 |
| 1957 | 35 |
| 1958 | 25 |
| 1959 | 29 |
| 1960 | 20 |
| 1961 | 31 |
| 1962 | 23 |
| 1963 | 19 |
| 1964 | 66 |
| 1965 | 38 |
| 1966 | 59 |
| 1967 | 44 |
| 1968 | 41 |
| 1969 | 19 |
| 1970 | 26 |
| 1971 | 38 |
| 1972 | 44 |
| 1973 | 20 |
| 1974 | 18 |
| 1975 | 17 |
| 1976 | 23 |
| 1977 | 31 |
| 1978 | 26 |
| 1979 | 17 |
| 1980 | 14 |
| 1981 | 20 |
| 1982 | 16 |
| 1983 | 19 |
| 1984 | 20 |
| 1985 | 15 |
| 1986 | 13 |
| 1987 | 25 |
| 1988 | 21 |
| 1989 | 33 |
| 1990 | 19 |
| 1991 | 15 |
| 1992 | 13 |
| 1993 | 13 |
| 1994 | 7 |
| 1995 | 23 |
| 1996 | 14 |
| 1997 | 18 |
| 1998 | 23 |
| 1999 | 9 |
| 2000 | 22 |
| 2001 | 11 |
| 2002 | 12 |
| 2003 | 23 |
| 2004 | 6 |
| 2005 | 12 |
| 2006 | 18 |
| 2007 | 10 |
| 2009 | 4 |
| 2010 | 5 |
| 2011 | 9 |
| 2012 | 10 |
| 2013 | 14 |
| 2014 | 15 |
| 2015 | 17 |
| 2016 | 7 |
| 2017 | 7 |
| 2018 | 7 |
| 2019 | 4 |
| 2020 | 11 |
| 2021 | 10 |
| 2022 | 14 |
| 2023 | 4 |
| 2024 | 7 |
| 2025 | 21 |
| 2026 | 22 |
All-Time Record Progression
2 new records| Date | Kind | Detail |
|---|---|---|
| 1990-12-22 | Record low minimum temperature | Record low minimum temperature -14.4 C (6.1 F) |
| 1995-01-09 | Record daily precipitation | Record daily precipitation 164.3 mm (6.5 in) |
Wettest Day of Each Month
Jan: 164.3 mm (6.5 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 164.3 mm (6.5 in) | 9 January 1995 |
| Feb | 119.4 mm (4.7 in) | 3 February 1998 |
| Mar | 133.6 mm (5.3 in) | 9 March 1995 |
| Apr | 68.8 mm (2.7 in) | 12 April 2006 |
| May | 51.6 mm (2.0 in) | 28 May 1990 |
| Jun | 29.2 mm (1.1 in) | 2 June 1967 |
| Jul | 17.8 mm (0.7 in) | 8 July 1974 |
| Aug | 30.5 mm (1.2 in) | 18 August 1965 |
| Sep | 71.4 mm (2.8 in) | 17 September 1989 |
| Oct | 78.2 mm (3.1 in) | 23 October 1989 |
| Nov | 78.0 mm (3.1 in) | 14 November 1965 |
| Dec | 159.5 mm (6.3 in) | 12 December 1995 |
Period of Record Coverage
1954 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1954 | 67 | 18% | No |
| 1955 | 365 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 304 | 83% | No |
| 1958 | 288 | 79% | No |
| 1959 | 320 | 88% | No |
| 1960 | 242 | 66% | No |
| 1961 | 360 | 99% | Yes |
| 1962 | 329 | 90% | Yes |
| 1963 | 284 | 78% | No |
| 1964 | 365 | 100% | Yes |
| 1965 | 358 | 98% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 362 | 99% | Yes |
| 1968 | 298 | 81% | No |
| 1969 | 362 | 99% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 364 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 359 | 98% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 365 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 365 | 100% | Yes |
| 1983 | 363 | 99% | Yes |
| 1984 | 364 | 99% | Yes |
| 1985 | 273 | 75% | No |
| 1986 | 287 | 79% | No |
| 1987 | 365 | 100% | Yes |
| 1988 | 361 | 99% | Yes |
| 1989 | 364 | 100% | Yes |
| 1990 | 363 | 99% | Yes |
| 1991 | 362 | 99% | Yes |
| 1992 | 334 | 91% | Yes |
| 1993 | 361 | 99% | Yes |
| 1994 | 358 | 98% | Yes |
| 1995 | 361 | 99% | Yes |
| 1996 | 351 | 96% | Yes |
| 1997 | 363 | 99% | Yes |
| 1998 | 362 | 99% | Yes |
| 1999 | 363 | 99% | Yes |
| 2000 | 358 | 98% | Yes |
| 2001 | 324 | 89% | No |
| 2002 | 363 | 99% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 365 | 100% | Yes |
| 2005 | 361 | 99% | Yes |
| 2006 | 364 | 100% | Yes |
| 2007 | 302 | 83% | No |
| 2009 | 150 | 41% | No |
| 2010 | 221 | 61% | No |
| 2011 | 179 | 49% | No |
| 2012 | 190 | 52% | No |
| 2013 | 176 | 48% | No |
| 2014 | 131 | 36% | No |
| 2015 | 105 | 29% | No |
| 2016 | 100 | 27% | No |
| 2017 | 66 | 18% | No |
| 2018 | 99 | 27% | No |
| 2019 | 86 | 24% | No |
| 2020 | 48 | 13% | No |
| 2021 | 54 | 15% | No |
| 2022 | 152 | 42% | No |
| 2023 | 26 | 7% | No |
| 2024 | 150 | 41% | No |
| 2025 | 355 | 97% | Yes |
| 2026 | 262 | 72% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 6 October 2026 | Clearlake 4 SE, US | daily high max (Tie, Provisional) | 36.7 C (98.1 F) | tie | 45 years | 5 of 100 (Routine) |
| 4 October 2026 | Clearlake 4 SE, US | daily high min (Tie, Provisional) | 11.7 C (53.1 F) | tie | 69 years | 6 of 100 (Routine) |
| 10 September 2026 | Clearlake 4 SE, US | daily high min (Provisional) | 16.7 C (62.1 F) | 2.8 C (5.0 F) | 68 years | 36 of 100 (Notable) |
| 4 September 2026 | Clearlake 4 SE, US | daily low max (Provisional) | 20.6 C (69.1 F) | 0.5 C (0.9 F) | 25 years | 14 of 100 (Routine) |
| 20 July 2026 | Clearlake 4 SE, US | daily high min (Tie) | 19.4 C (66.9 F) | tie | 64 years | 6 of 100 (Routine) |
| 16 June 2026 | Clearlake 4 SE, US | daily high min (Tie) | 15.6 C (60.1 F) | tie | 55 years | 5 of 100 (Routine) |
| 11 June 2026 | Clearlake 4 SE, US | daily high min | 17.2 C (63.0 F) | 0.5 C (0.9 F) | 64 years | 27 of 100 (Routine) |
| 2 May 2026 | Clearlake 4 SE, US | daily high max | 32.2 C (90.0 F) | 1.1 C (2.0 F) | 33 years | 18 of 100 (Routine) |
| 31 March 2026 | Clearlake 4 SE, US | monthly high min (Tie) | 11.1 C (52.0 F) | tie | 37 years | 7 of 100 (Routine) |
| 23 March 2026 | Clearlake 4 SE, US | daily high max | 27.8 C (82.0 F) | 0.6 C (1.1 F) | 65 years | 27 of 100 (Routine) |
| 22 March 2026 | Clearlake 4 SE, US | daily high max | 28.9 C (84.0 F) | 1.1 C (2.0 F) | 65 years | 28 of 100 (Routine) |
| 21 March 2026 | Clearlake 4 SE, US | daily high min | 9.4 C (48.9 F) | 0.5 C (0.9 F) | 59 years | 25 of 100 (Routine) |
| 21 March 2026 | Clearlake 4 SE, US | monthly high max | 33.9 C (93.0 F) | 1.7 C (3.1 F) | 0 years | 20 of 100 (Routine) |
| 20 March 2026 | Clearlake 4 SE, US | daily high max | 30.6 C (87.1 F) | 3.4 C (6.1 F) | 65 years | 32 of 100 (Routine) |
| 19 March 2026 | Clearlake 4 SE, US | daily high max | 31.1 C (88.0 F) | 3.3 C (5.9 F) | 65 years | 32 of 100 (Routine) |
| 18 March 2026 | Clearlake 4 SE, US | monthly high max | 32.2 C (90.0 F) | 1.1 C (2.0 F) | 0 years | 19 of 100 (Routine) |
| 17 March 2026 | Clearlake 4 SE, US | monthly high max | 31.1 C (88.0 F) | 2.2 C (4.0 F) | 59 years | 38 of 100 (Notable) |
| 16 March 2026 | Clearlake 4 SE, US | daily high max | 28.3 C (82.9 F) | 0.5 C (0.9 F) | 19 years | 13 of 100 (Routine) |
| 9 March 2026 | Clearlake 4 SE, US | daily high max | 26.1 C (79.0 F) | 0.5 C (0.9 F) | 47 years | 22 of 100 (Routine) |
| 28 February 2026 | Clearlake 4 SE, US | daily high min | 10.0 C (50.0 F) | 1.1 C (2.0 F) | 68 years | 29 of 100 (Routine) |
Climate Trend
30 complete years, 1955 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1955 | 13.3 C | -0.45 C |
| 1956 | 13.5 C | -0.25 C |
| 1961 | 13.8 C | +0.10 C |
| 1964 | 13.2 C | -0.55 C |
| 1965 | 12.9 C | -0.81 C |
| 1966 | 13.4 C | -0.31 C |
| 1967 | 13.7 C | -0.05 C |
| 1969 | 13.8 C | +0.03 C |
| 1970 | 13.9 C | +0.16 C |
| 1971 | 13.0 C | -0.71 C |
| 1972 | 13.6 C | -0.15 C |
| 1973 | 14.2 C | +0.46 C |
| 1974 | 13.6 C | -0.14 C |
| 1975 | 13.0 C | -0.72 C |
| 1976 | 13.7 C | -0.04 C |
| 1977 | 14.2 C | +0.48 C |
| 1978 | 13.8 C | +0.06 C |
| 1979 | 13.9 C | +0.12 C |
| 1980 | 13.9 C | +0.12 C |
| 1981 | 14.8 C | +1.03 C |
| 1982 | 12.9 C | -0.80 C |
| 1983 | 13.0 C | -0.73 C |
| 1989 | 13.5 C | -0.25 C |
| 1990 | 13.6 C | -0.09 C |
| 1991 | 13.9 C | +0.20 C |
| 1994 | 13.3 C | -0.45 C |
| 1995 | 14.7 C | +0.98 C |
| 1996 | 14.3 C | +0.52 C |
| 2004 | 14.3 C | +0.55 C |
| 2025 | 15.4 C | +1.62 C |
The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1955 to 2025. In Fahrenheit: 0.4 F (0.2 to 0.6) per decade. The slope is a straight line fitted to 30 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.2 C (0.1 to 0.3) per decade | 0.4 F (0.2 to 0.6) per decade | 1955 to 2025 | 30 | Rise |
| Mean daily maximum | -0.01 C (-0.17 to 0.15) per decade | -0.02 F (-0.31 to 0.27) per decade | 1955 to 2025 | 30 | Not clearly different from zero |
| Mean daily minimum | 0.5 C (0.3 to 0.6) per decade | 0.8 F (0.5 to 1.2) per decade | 1955 to 2025 | 30 | Rise |
A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.
Extremes by Year
1954 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 45.6 C (114.1 F) | 1977 | 40.6 C (105.1 F) | 72 |
| Coldest night (TNn) | -14.4 C (6.1 F) | 1990 | -7.5 C (18.5 F) | 72 |
| Wettest day (Rx1day) | 164.3 mm (6.5 in) | 1995 | 56.3 mm (2.2 in) | 72 |
| Wettest five days (Rx5day) | 353.7 mm (13.9 in) | 1995 | 109.1 mm (4.3 in) | 64 |
| Longest dry spell (CDD) | 169 days | 2002 | 95 days | 72 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1954 | 26.1 C (79.0 F) |
| 1955 | 43.9 C (111.0 F) |
| 1956 | 41.1 C (106.0 F) |
| 1957 | 41.1 C (106.0 F) |
| 1958 | 40.0 C (104.0 F) |
| 1959 | 40.6 C (105.1 F) |
| 1960 | 40.6 C (105.1 F) |
| 1961 | 41.7 C (107.1 F) |
| 1962 | 37.2 C (99.0 F) |
| 1963 | 38.9 C (102.0 F) |
| 1964 | 42.2 C (108.0 F) |
| 1965 | 39.4 C (102.9 F) |
| 1966 | 41.1 C (106.0 F) |
| 1967 | 42.2 C (108.0 F) |
| 1968 | 40.6 C (105.1 F) |
| 1969 | 41.7 C (107.1 F) |
| 1970 | 40.6 C (105.1 F) |
| 1971 | 43.3 C (109.9 F) |
| 1972 | 45.0 C (113.0 F) |
| 1973 | 42.8 C (109.0 F) |
| 1974 | 40.6 C (105.1 F) |
| 1975 | 42.2 C (108.0 F) |
| 1976 | 40.6 C (105.1 F) |
| 1977 | 45.6 C (114.1 F) |
| 1978 | 44.4 C (111.9 F) |
| 1979 | 41.7 C (107.1 F) |
| 1980 | 41.7 C (107.1 F) |
| 1981 | 44.4 C (111.9 F) |
| 1982 | 40.6 C (105.1 F) |
| 1983 | 38.3 C (100.9 F) |
| 1984 | 41.1 C (106.0 F) |
| 1985 | 40.6 C (105.1 F) |
| 1986 | 38.3 C (100.9 F) |
| 1987 | 40.0 C (104.0 F) |
| 1988 | 43.3 C (109.9 F) |
| 1989 | 37.8 C (100.0 F) |
| 1990 | 41.7 C (107.1 F) |
| 1991 | 41.1 C (106.0 F) |
| 1992 | 38.9 C (102.0 F) |
| 1993 | 38.9 C (102.0 F) |
| 1994 | 37.2 C (99.0 F) |
| 1995 | 38.9 C (102.0 F) |
| 1996 | 39.4 C (102.9 F) |
| 1997 | 38.9 C (102.0 F) |
| 1998 | 41.7 C (107.1 F) |
| 1999 | 39.4 C (102.9 F) |
| 2000 | 40.6 C (105.1 F) |
| 2001 | 40.0 C (104.0 F) |
| 2002 | 42.8 C (109.0 F) |
| 2003 | 38.9 C (102.0 F) |
| 2004 | 37.2 C (99.0 F) |
| 2005 | 38.9 C (102.0 F) |
| 2006 | 43.9 C (111.0 F) |
| 2007 | 40.0 C (104.0 F) |
| 2009 | 40.6 C (105.1 F) |
| 2010 | 37.8 C (100.0 F) |
| 2011 | 38.3 C (100.9 F) |
| 2012 | 40.6 C (105.1 F) |
| 2013 | 42.2 C (108.0 F) |
| 2014 | 41.1 C (106.0 F) |
| 2015 | 39.4 C (102.9 F) |
| 2016 | 41.7 C (107.1 F) |
| 2017 | 41.7 C (107.1 F) |
| 2018 | 40.6 C (105.1 F) |
| 2019 | 39.4 C (102.9 F) |
| 2020 | 42.8 C (109.0 F) |
| 2021 | 43.3 C (109.9 F) |
| 2022 | 45.0 C (113.0 F) |
| 2023 | 41.1 C (106.0 F) |
| 2024 | 39.4 C (102.9 F) |
| 2025 | 38.9 C (102.0 F) |
| 2026 | 41.1 C (106.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1954 | -8.3 C (17.1 F) |
| 1955 | -7.8 C (18.0 F) |
| 1956 | -10.6 C (12.9 F) |
| 1957 | -9.4 C (15.1 F) |
| 1958 | -6.1 C (21.0 F) |
| 1959 | -6.7 C (19.9 F) |
| 1960 | -9.4 C (15.1 F) |
| 1961 | -8.3 C (17.1 F) |
| 1962 | -8.3 C (17.1 F) |
| 1963 | -9.4 C (15.1 F) |
| 1964 | -7.8 C (18.0 F) |
| 1965 | -10.0 C (14.0 F) |
| 1966 | -8.9 C (16.0 F) |
| 1967 | -7.8 C (18.0 F) |
| 1968 | -9.4 C (15.1 F) |
| 1969 | -7.2 C (19.0 F) |
| 1970 | -8.9 C (16.0 F) |
| 1971 | -8.3 C (17.1 F) |
| 1972 | -12.8 C (9.0 F) |
| 1973 | -10.0 C (14.0 F) |
| 1974 | -13.3 C (8.1 F) |
| 1975 | -10.6 C (12.9 F) |
| 1976 | -8.9 C (16.0 F) |
| 1977 | -7.2 C (19.0 F) |
| 1978 | -9.4 C (15.1 F) |
| 1979 | -9.4 C (15.1 F) |
| 1980 | -9.4 C (15.1 F) |
| 1981 | -5.0 C (23.0 F) |
| 1982 | -7.2 C (19.0 F) |
| 1983 | -6.7 C (19.9 F) |
| 1984 | -10.6 C (12.9 F) |
| 1985 | -5.6 C (21.9 F) |
| 1986 | -5.0 C (23.0 F) |
| 1987 | -5.6 C (21.9 F) |
| 1988 | -6.7 C (19.9 F) |
| 1989 | -8.9 C (16.0 F) |
| 1990 | -14.4 C (6.1 F) |
| 1991 | -9.4 C (15.1 F) |
| 1992 | -7.8 C (18.0 F) |
| 1993 | -6.7 C (19.9 F) |
| 1994 | -6.7 C (19.9 F) |
| 1995 | -3.9 C (25.0 F) |
| 1996 | -6.7 C (19.9 F) |
| 1997 | -6.1 C (21.0 F) |
| 1998 | -10.6 C (12.9 F) |
| 1999 | -11.1 C (12.0 F) |
| 2000 | -5.0 C (23.0 F) |
| 2001 | -5.0 C (23.0 F) |
| 2002 | -7.2 C (19.0 F) |
| 2003 | -6.7 C (19.9 F) |
| 2004 | -5.0 C (23.0 F) |
| 2005 | -5.6 C (21.9 F) |
| 2006 | -7.2 C (19.0 F) |
| 2007 | -8.9 C (16.0 F) |
| 2009 | -10.6 C (12.9 F) |
| 2010 | -5.6 C (21.9 F) |
| 2011 | -5.6 C (21.9 F) |
| 2012 | -9.4 C (15.1 F) |
| 2013 | -10.6 C (12.9 F) |
| 2014 | -6.1 C (21.0 F) |
| 2015 | -8.3 C (17.1 F) |
| 2016 | -5.0 C (23.0 F) |
| 2017 | -5.6 C (21.9 F) |
| 2018 | -6.7 C (19.9 F) |
| 2019 | -4.4 C (24.1 F) |
| 2020 | -5.0 C (23.0 F) |
| 2021 | -3.3 C (26.1 F) |
| 2022 | -7.8 C (18.0 F) |
| 2023 | 8.3 C (46.9 F) |
| 2024 | -3.3 C (26.1 F) |
| 2025 | -5.0 C (23.0 F) |
| 2026 | -6.1 C (21.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1954 | 58.4 mm (2.3 in) |
| 1955 | 84.3 mm (3.3 in) |
| 1956 | 43.4 mm (1.7 in) |
| 1957 | 50.5 mm (2.0 in) |
| 1958 | 67.1 mm (2.6 in) |
| 1959 | 98.8 mm (3.9 in) |
| 1960 | 76.2 mm (3.0 in) |
| 1961 | 50.8 mm (2.0 in) |
| 1962 | 76.2 mm (3.0 in) |
| 1963 | 56.1 mm (2.2 in) |
| 1964 | 47.0 mm (1.9 in) |
| 1965 | 78.0 mm (3.1 in) |
| 1966 | 58.9 mm (2.3 in) |
| 1967 | 43.2 mm (1.7 in) |
| 1968 | 66.0 mm (2.6 in) |
| 1969 | 53.3 mm (2.1 in) |
| 1970 | 73.7 mm (2.9 in) |
| 1971 | 44.7 mm (1.8 in) |
| 1972 | 53.3 mm (2.1 in) |
| 1973 | 55.1 mm (2.2 in) |
| 1974 | 41.4 mm (1.6 in) |
| 1975 | 55.9 mm (2.2 in) |
| 1976 | 37.1 mm (1.5 in) |
| 1977 | 42.9 mm (1.7 in) |
| 1978 | 56.4 mm (2.2 in) |
| 1979 | 60.5 mm (2.4 in) |
| 1980 | 59.9 mm (2.4 in) |
| 1981 | 53.3 mm (2.1 in) |
| 1982 | 63.5 mm (2.5 in) |
| 1983 | 105.7 mm (4.2 in) |
| 1984 | 45.0 mm (1.8 in) |
| 1985 | 39.1 mm (1.5 in) |
| 1986 | 10.7 mm (0.4 in) |
| 1987 | 44.5 mm (1.8 in) |
| 1988 | 56.1 mm (2.2 in) |
| 1989 | 78.2 mm (3.1 in) |
| 1990 | 61.2 mm (2.4 in) |
| 1991 | 73.9 mm (2.9 in) |
| 1992 | 50.3 mm (2.0 in) |
| 1993 | 65.5 mm (2.6 in) |
| 1994 | 43.4 mm (1.7 in) |
| 1995 | 164.3 mm (6.5 in) |
| 1996 | 58.9 mm (2.3 in) |
| 1997 | 112.5 mm (4.4 in) |
| 1998 | 119.4 mm (4.7 in) |
| 1999 | 61.5 mm (2.4 in) |
| 2000 | 46.2 mm (1.8 in) |
| 2001 | 64.5 mm (2.5 in) |
| 2002 | 109.0 mm (4.3 in) |
| 2003 | 59.9 mm (2.4 in) |
| 2004 | 81.5 mm (3.2 in) |
| 2005 | 81.3 mm (3.2 in) |
| 2006 | 68.8 mm (2.7 in) |
| 2007 | 34.3 mm (1.4 in) |
| 2009 | 22.1 mm (0.9 in) |
| 2010 | 47.5 mm (1.9 in) |
| 2011 | 58.9 mm (2.3 in) |
| 2012 | 57.7 mm (2.3 in) |
| 2013 | 15.7 mm (0.6 in) |
| 2014 | 49.8 mm (2.0 in) |
| 2015 | 63.5 mm (2.5 in) |
| 2016 | 50.0 mm (2.0 in) |
| 2017 | 74.7 mm (2.9 in) |
| 2018 | 5.8 mm (0.23 in) |
| 2019 | 112.5 mm (4.4 in) |
| 2020 | 15.0 mm (0.6 in) |
| 2021 | 62.7 mm (2.5 in) |
| 2022 | 2.8 mm (0.11 in) |
| 2023 | 0.5 mm (0.02 in) |
| 2024 | 33.5 mm (1.3 in) |
| 2025 | 47.5 mm (1.9 in) |
| 2026 | 31.0 mm (1.2 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1954 | 110.4 mm (4.3 in) |
| 1955 | 199.6 mm (7.9 in) |
| 1956 | 126.6 mm (5.0 in) |
| 1957 | 138.0 mm (5.4 in) |
| 1958 | 117.2 mm (4.6 in) |
| 1959 | 159.0 mm (6.3 in) |
| 1960 | 110.5 mm (4.4 in) |
| 1961 | 80.8 mm (3.2 in) |
| 1962 | 188.0 mm (7.4 in) |
| 1963 | 111.2 mm (4.4 in) |
| 1964 | 105.4 mm (4.1 in) |
| 1965 | 131.8 mm (5.2 in) |
| 1966 | 98.7 mm (3.9 in) |
| 1967 | 84.9 mm (3.3 in) |
| 1968 | 149.8 mm (5.9 in) |
| 1969 | 105.6 mm (4.2 in) |
| 1970 | 143.7 mm (5.7 in) |
| 1971 | 90.2 mm (3.6 in) |
| 1972 | 95.0 mm (3.7 in) |
| 1973 | 116.2 mm (4.6 in) |
| 1974 | 79.8 mm (3.1 in) |
| 1975 | 107.8 mm (4.2 in) |
| 1976 | 53.8 mm (2.1 in) |
| 1977 | 62.7 mm (2.5 in) |
| 1978 | 183.2 mm (7.2 in) |
| 1979 | 128.2 mm (5.0 in) |
| 1980 | 168.9 mm (6.6 in) |
| 1981 | 117.9 mm (4.6 in) |
| 1982 | 101.4 mm (4.0 in) |
| 1983 | 209.7 mm (8.3 in) |
| 1984 | 98.3 mm (3.9 in) |
| 1985 | 54.2 mm (2.1 in) |
| 1986 | 25.3 mm (1.0 in) |
| 1987 | 98.6 mm (3.9 in) |
| 1988 | 81.0 mm (3.2 in) |
| 1989 | 122.4 mm (4.8 in) |
| 1990 | 97.5 mm (3.8 in) |
| 1991 | 187.2 mm (7.4 in) |
| 1992 | 139.4 mm (5.5 in) |
| 1993 | 125.7 mm (4.9 in) |
| 1994 | 74.0 mm (2.9 in) |
| 1995 | 353.7 mm (13.9 in) |
| 1996 | 114.3 mm (4.5 in) |
| 1997 | 177.1 mm (7.0 in) |
| 1998 | 264.5 mm (10.4 in) |
| 1999 | 116.9 mm (4.6 in) |
| 2000 | 93.7 mm (3.7 in) |
| 2001 | 101.1 mm (4.0 in) |
| 2002 | 267.3 mm (10.5 in) |
| 2003 | 99.1 mm (3.9 in) |
| 2004 | 175.6 mm (6.9 in) |
| 2005 | 131.3 mm (5.2 in) |
| 2006 | 135.8 mm (5.3 in) |
| 2007 | 96.8 mm (3.8 in) |
| 2009 | 1.6 mm (0.06 in) |
| 2010 | 111.5 mm (4.4 in) |
| 2011 | 2.2 mm (0.09 in) |
| 2012 | 0.0 mm (0.00 in) |
| 2013 | 0.0 mm (0.00 in) |
| 2014 | n/a |
| 2015 | n/a |
| 2016 | n/a |
| 2017 | n/a |
| 2018 | n/a |
| 2019 | n/a |
| 2020 | n/a |
| 2021 | n/a |
| 2022 | 3.3 mm (0.13 in) |
| 2023 | 0.5 mm (0.02 in) |
| 2024 | 47.7 mm (1.9 in) |
| 2025 | 33.3 mm (1.3 in) |
| 2026 | 60.7 mm (2.4 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1954 | 16 days |
| 1955 | 140 days |
| 1956 | 60 days |
| 1957 | 128 days |
| 1958 | 149 days |
| 1959 | 144 days |
| 1960 | 66 days |
| 1961 | 89 days |
| 1962 | 55 days |
| 1963 | 132 days |
| 1964 | 83 days |
| 1965 | 114 days |
| 1966 | 84 days |
| 1967 | 107 days |
| 1968 | 99 days |
| 1969 | 117 days |
| 1970 | 130 days |
| 1971 | 124 days |
| 1972 | 107 days |
| 1973 | 158 days |
| 1974 | 72 days |
| 1975 | 59 days |
| 1976 | 55 days |
| 1977 | 100 days |
| 1978 | 68 days |
| 1979 | 112 days |
| 1980 | 55 days |
| 1981 | 80 days |
| 1982 | 76 days |
| 1983 | 80 days |
| 1984 | 60 days |
| 1985 | 118 days |
| 1986 | 131 days |
| 1987 | 136 days |
| 1988 | 127 days |
| 1989 | 102 days |
| 1990 | 114 days |
| 1991 | 118 days |
| 1992 | 93 days |
| 1993 | 116 days |
| 1994 | 140 days |
| 1995 | 168 days |
| 1996 | 149 days |
| 1997 | 76 days |
| 1998 | 84 days |
| 1999 | 145 days |
| 2000 | 84 days |
| 2001 | 87 days |
| 2002 | 169 days |
| 2003 | 85 days |
| 2004 | 150 days |
| 2005 | 119 days |
| 2006 | 133 days |
| 2007 | 77 days |
| 2009 | 130 days |
| 2010 | 140 days |
| 2011 | 5 days |
| 2012 | 5 days |
| 2013 | 5 days |
| 2014 | 4 days |
| 2015 | 2 days |
| 2016 | 3 days |
| 2017 | 3 days |
| 2018 | 3 days |
| 2019 | 2 days |
| 2020 | 2 days |
| 2021 | 1 day |
| 2022 | 105 days |
| 2023 | 18 days |
| 2024 | 41 days |
| 2025 | 119 days |
| 2026 | 96 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.
Frost Dates and Growing Season
30 years with a frostAcross 30 years with a frost, the median last spring frost at Clearlake 4 SE falls on 20 April and the median first autumn frost on 25 October, which leaves a median of 183 days between them.
Fitted over all years, the growing season changes by +14.2 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1955 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 20 April | n/a | 20 April | n/a | -7.9 days per decade |
| First autumn frost | 25 October | n/a | 25 October | n/a | +6.3 days per decade |
| Growing days | 183 days | n/a | 183 days | n/a | +14.2 days per decade |
A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.
Rainfall Return Levels
45 years, 1955 to 2006A day with at least 59.4 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 170.3 mm (6.7 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 59.4 mm (2.3 in) | |
| 5 years | 79.4 mm (3.1 in) | |
| 10 years | 95.8 mm (3.8 in) | |
| 25 years | 121.1 mm (4.8 in) | |
| 50 years | 143.8 mm (5.7 in) | Longer than the 45 years of record |
| 100 years | 170.3 mm (6.7 in) | Longer than the 45 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, 45 years of values from 1955 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: 164.3 mm (6.5 in) in 1995; 119.4 mm (4.7 in) in 1998; 112.5 mm (4.4 in) in 1997.
Download the Data
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 (2026-10-13).