Chester Weather Records (USC00041700)
Record envelope, standing records and threshold days for Chester (USC00041700), California, United States, with 118 years of record.
Key Facts for Chester
- Chester (USC00041700) is a weather station in California, United States at 40.30 latitude and -121.24 longitude, 1,387 m (4,551 ft) above sea level.
- The station reports from 1909 to 2026, 118 years of record.
- 1,464 records set at Chester still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Chester tied a daily record high minimum temperature of 5.6 C (42.1 F) on 6 November 2025.
About the Station
- Location: California, United States, 40.30 latitude, -121.24 longitude.
- Elevation: 1,387 m (4,551 ft).
- Period of record: 1909 to 2026, 118 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 18.3 C (64.9 F) | -23.9 C (-11.0 F) | 10.6 C (51.1 F) | -7.8 C (18.0 F) |
| Feb | 21.1 C (70.0 F) | -23.3 C (-9.9 F) | n/a | n/a |
| Mar | 25.0 C (77.0 F) | -19.4 C (-2.9 F) | n/a | n/a |
| Apr | 28.9 C (84.0 F) | -15.0 C (5.0 F) | 22.2 C (72.0 F) | -5.6 C (21.9 F) |
| May | 33.9 C (93.0 F) | -10.0 C (14.0 F) | n/a | n/a |
| Jun | 37.2 C (99.0 F) | -4.4 C (24.1 F) | 32.8 C (91.0 F) | 3.9 C (39.0 F) |
| Jul | 40.0 C (104.0 F) | -2.8 C (27.0 F) | 35.6 C (96.1 F) | 7.8 C (46.0 F) |
| Aug | 39.4 C (102.9 F) | -2.8 C (27.0 F) | 35.0 C (95.0 F) | 7.8 C (46.0 F) |
| Sep | 41.1 C (106.0 F) | -9.4 C (15.1 F) | n/a | n/a |
| Oct | 32.2 C (90.0 F) | -11.1 C (12.0 F) | n/a | n/a |
| Nov | 24.4 C (75.9 F) | -16.1 C (3.0 F) | 20.6 C (69.1 F) | -1.1 C (30.0 F) |
| Dec | 16.7 C (62.1 F) | -26.7 C (-16.1 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1957 | 7 |
| 1958 | 15 |
| 1959 | 37 |
| 1960 | 45 |
| 1961 | 46 |
| 1962 | 32 |
| 1963 | 28 |
| 1964 | 27 |
| 1965 | 19 |
| 1966 | 36 |
| 1967 | 25 |
| 1968 | 20 |
| 1969 | 22 |
| 1970 | 17 |
| 1971 | 34 |
| 1972 | 35 |
| 1973 | 11 |
| 1974 | 13 |
| 1975 | 16 |
| 1976 | 32 |
| 1977 | 15 |
| 1978 | 22 |
| 1979 | 20 |
| 1980 | 14 |
| 1981 | 21 |
| 1982 | 13 |
| 1983 | 19 |
| 1984 | 13 |
| 1985 | 24 |
| 1986 | 29 |
| 1987 | 26 |
| 1988 | 30 |
| 1989 | 25 |
| 1990 | 28 |
| 1991 | 13 |
| 1992 | 10 |
| 1993 | 15 |
| 1994 | 9 |
| 1995 | 16 |
| 1996 | 19 |
| 1997 | 13 |
| 1998 | 31 |
| 1999 | 29 |
| 2000 | 11 |
| 2001 | 11 |
| 2002 | 12 |
| 2003 | 18 |
| 2004 | 11 |
| 2005 | 13 |
| 2006 | 16 |
| 2007 | 15 |
| 2008 | 13 |
| 2009 | 11 |
| 2010 | 18 |
| 2011 | 19 |
| 2012 | 16 |
| 2013 | 13 |
| 2014 | 14 |
| 2015 | 28 |
| 2016 | 14 |
| 2017 | 13 |
| 2018 | 7 |
| 2019 | 13 |
| 2020 | 14 |
| 2021 | 16 |
| 2022 | 25 |
| 2023 | 4 |
| 2024 | 134 |
| 2025 | 14 |
All-Time Record Progression
13 new records| Date | Kind | Detail |
|---|---|---|
| 1950-02-04 | Record daily precipitation | Record daily precipitation 103.1 mm (4.1 in) |
| 1962-10-12 | Record daily precipitation | Record daily precipitation 114.3 mm (4.5 in) |
| 1962-10-13 | Record daily precipitation | Record daily precipitation 149.9 mm (5.9 in) |
| 1968-01-29 | Record daily snowfall | Record daily snowfall 121.9 cm (48.0 in) |
| 1990-12-21 | Record low maximum temperature | Record low maximum temperature -11.1 C (12.0 F) |
| 2002-07-12 | Record high maximum temperature | Record high maximum temperature 40.0 C (104.0 F) |
| 2005-07-15 | Record high minimum temperature | Record high minimum temperature 18.3 C (64.9 F) |
| 2015-07-03 | Record high minimum temperature | Record high minimum temperature 19.4 C (66.9 F) |
| 2022-07-30 | Record high minimum temperature | Record high minimum temperature 20.0 C (68.0 F) |
| 2024-02-20 | Record daily precipitation | Record daily precipitation 152.4 mm (6.0 in) |
| 2024-07-05 | Record high minimum temperature | Record high minimum temperature 20.6 C (69.1 F) |
| 2024-07-06 | Record high minimum temperature | Record high minimum temperature 21.7 C (71.1 F) |
| 2024-09-04 | Record high maximum temperature | Record high maximum temperature 41.1 C (106.0 F) |
Wettest Day of Each Month
Feb: 152.4 mm (6.0 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 117.1 mm (4.6 in) | 10 January 1995 |
| Feb | 152.4 mm (6.0 in) | 20 February 2024 |
| Mar | 127.5 mm (5.0 in) | 9 March 1995 |
| Apr | 58.9 mm (2.3 in) | 7 April 2017 |
| May | 43.2 mm (1.7 in) | 9 May 2005 |
| Jun | 55.1 mm (2.2 in) | 12 June 1958 |
| Jul | 31.5 mm (1.2 in) | 28 July 2020 |
| Aug | 38.6 mm (1.5 in) | 26 August 2025 |
| Sep | 47.0 mm (1.9 in) | 6 September 1912 |
| Oct | 149.9 mm (5.9 in) | 13 October 1962 |
| Nov | 152.4 mm (6.0 in) | 21 November 2024 |
| Dec | 98.8 mm (3.9 in) | 19 December 1955 |
Period of Record Coverage
1957 to 2025| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1957 | 131 | 36% | No |
| 1958 | 365 | 100% | Yes |
| 1959 | 357 | 98% | Yes |
| 1960 | 331 | 90% | Yes |
| 1961 | 349 | 96% | Yes |
| 1962 | 352 | 96% | Yes |
| 1963 | 331 | 91% | Yes |
| 1964 | 326 | 89% | No |
| 1965 | 349 | 96% | Yes |
| 1966 | 350 | 96% | Yes |
| 1967 | 361 | 99% | Yes |
| 1968 | 364 | 99% | Yes |
| 1969 | 361 | 99% | Yes |
| 1970 | 364 | 100% | Yes |
| 1971 | 364 | 100% | Yes |
| 1972 | 362 | 99% | Yes |
| 1973 | 341 | 93% | Yes |
| 1974 | 362 | 99% | Yes |
| 1975 | 359 | 98% | Yes |
| 1976 | 364 | 99% | Yes |
| 1977 | 362 | 99% | Yes |
| 1978 | 357 | 98% | Yes |
| 1979 | 363 | 99% | Yes |
| 1980 | 365 | 100% | Yes |
| 1981 | 363 | 99% | Yes |
| 1982 | 352 | 96% | Yes |
| 1983 | 356 | 98% | Yes |
| 1984 | 358 | 98% | Yes |
| 1985 | 355 | 97% | Yes |
| 1986 | 352 | 96% | Yes |
| 1987 | 360 | 99% | Yes |
| 1988 | 350 | 96% | Yes |
| 1989 | 347 | 95% | Yes |
| 1990 | 363 | 99% | Yes |
| 1991 | 354 | 97% | Yes |
| 1992 | 361 | 99% | Yes |
| 1993 | 349 | 96% | Yes |
| 1994 | 356 | 98% | Yes |
| 1995 | 352 | 96% | Yes |
| 1996 | 356 | 97% | Yes |
| 1997 | 354 | 97% | Yes |
| 1998 | 353 | 97% | Yes |
| 1999 | 359 | 98% | Yes |
| 2000 | 360 | 98% | Yes |
| 2001 | 337 | 92% | Yes |
| 2002 | 316 | 87% | No |
| 2003 | 307 | 84% | No |
| 2004 | 365 | 100% | Yes |
| 2005 | 323 | 88% | No |
| 2006 | 352 | 96% | Yes |
| 2007 | 326 | 89% | No |
| 2008 | 303 | 83% | No |
| 2009 | 361 | 99% | Yes |
| 2010 | 354 | 97% | Yes |
| 2011 | 360 | 99% | Yes |
| 2012 | 364 | 99% | Yes |
| 2013 | 363 | 99% | Yes |
| 2014 | 365 | 100% | Yes |
| 2015 | 364 | 100% | Yes |
| 2016 | 364 | 99% | Yes |
| 2017 | 362 | 99% | Yes |
| 2018 | 364 | 100% | Yes |
| 2019 | 363 | 99% | Yes |
| 2020 | 364 | 99% | Yes |
| 2021 | 323 | 88% | No |
| 2022 | 352 | 96% | Yes |
| 2023 | 123 | 34% | No |
| 2024 | 358 | 98% | Yes |
| 2025 | 183 | 50% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 6 November 2025 | Chester, US | daily high min (Tie) | 5.6 C (42.1 F) | tie | 0 years | 1 of 100 (Routine) |
| 4 November 2025 | Chester, US | daily high min | 7.2 C (45.0 F) | 1.1 C (2.0 F) | 0 years | 8 of 100 (Routine) |
| 26 August 2025 | Chester, US | monthly rain | 38.6 mm (1.5 in) | 0.8 mm (0.03 in) | 50 years | 36 of 100 (Notable) |
| 13 August 2025 | Chester, US | daily high min (Tie) | 14.4 C (57.9 F) | tie | 64 years | 6 of 100 (Routine) |
| 12 August 2025 | Chester, US | daily high min | 14.4 C (57.9 F) | 1.6 C (2.9 F) | 0 years | 10 of 100 (Routine) |
| 26 July 2025 | Chester, US | daily low max (Tie) | 24.4 C (75.9 F) | tie | 42 years | 4 of 100 (Routine) |
| 25 July 2025 | Chester, US | daily rain | 14.0 mm (0.6 in) | 10.2 mm (0.4 in) | 79 years | 20 of 100 (Routine) |
| 14 July 2025 | Chester, US | daily high min | 14.4 C (57.9 F) | 1.1 C (2.0 F) | 35 years | 19 of 100 (Routine) |
| 12 July 2025 | Chester, US | daily high min | 15.0 C (59.0 F) | 1.7 C (3.1 F) | 40 years | 22 of 100 (Routine) |
| 1 July 2025 | Chester, US | daily high min (Tie) | 13.3 C (55.9 F) | tie | 10 years | 2 of 100 (Routine) |
| 30 June 2025 | Chester, US | daily high min | 13.3 C (55.9 F) | 0.5 C (0.9 F) | 10 years | 10 of 100 (Routine) |
| 22 June 2025 | Chester, US | daily low max (Tie) | 19.4 C (66.9 F) | tie | 16 years | 2 of 100 (Routine) |
| 21 June 2025 | Chester, US | daily low max | 16.7 C (62.1 F) | 3.9 C (7.0 F) | 12 years | 16 of 100 (Routine) |
| 11 June 2025 | Chester, US | daily high min | 11.1 C (52.0 F) | 1.1 C (2.0 F) | 0 years | 9 of 100 (Routine) |
| 10 June 2025 | Chester, US | daily high min | 13.9 C (57.0 F) | 0.6 C (1.1 F) | 10 years | 10 of 100 (Routine) |
| 9 June 2025 | Chester, US | daily rain | 34.5 mm (1.4 in) | 11.1 mm (0.4 in) | 71 years | 48 of 100 (Notable) |
| 9 June 2025 | Chester, US | daily high min | 13.9 C (57.0 F) | 2.2 C (4.0 F) | 10 years | 15 of 100 (Routine) |
| 8 June 2025 | Chester, US | daily high min | 12.8 C (55.0 F) | 0.6 C (1.1 F) | 44 years | 20 of 100 (Routine) |
| 1 June 2025 | Chester, US | daily high min | 12.2 C (54.0 F) | 2.2 C (4.0 F) | 39 years | 23 of 100 (Routine) |
| 15 April 2025 | Chester, US | daily high min | 4.4 C (39.9 F) | 2.2 C (4.0 F) | 36 years | 24 of 100 (Routine) |
Climate Trend
57 complete years, 1958 to 2024| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1958 | 8.6 C | +0.18 C |
| 1959 | 8.5 C | +0.12 C |
| 1961 | 8.1 C | -0.33 C |
| 1962 | 7.8 C | -0.59 C |
| 1963 | 8.0 C | -0.40 C |
| 1965 | 7.5 C | -0.92 C |
| 1966 | 7.8 C | -0.59 C |
| 1967 | 7.8 C | -0.59 C |
| 1968 | 7.8 C | -0.61 C |
| 1969 | 7.7 C | -0.74 C |
| 1970 | 8.3 C | -0.10 C |
| 1971 | 7.3 C | -1.08 C |
| 1972 | 8.0 C | -0.45 C |
| 1974 | 8.6 C | +0.19 C |
| 1975 | 7.5 C | -0.95 C |
| 1976 | 8.2 C | -0.25 C |
| 1977 | 8.2 C | -0.21 C |
| 1978 | 7.8 C | -0.63 C |
| 1979 | 8.0 C | -0.39 C |
| 1980 | 8.2 C | -0.21 C |
| 1981 | 8.9 C | +0.50 C |
| 1982 | 7.2 C | -1.26 C |
| 1983 | 7.9 C | -0.54 C |
| 1984 | 8.5 C | +0.04 C |
| 1985 | 8.4 C | -0.05 C |
| 1986 | 9.2 C | +0.79 C |
| 1987 | 9.2 C | +0.79 C |
| 1988 | 9.4 C | +0.94 C |
| 1989 | 8.1 C | -0.29 C |
| 1990 | 7.8 C | -0.59 C |
| 1991 | 8.6 C | +0.13 C |
| 1992 | 9.1 C | +0.71 C |
| 1993 | 7.5 C | -0.97 C |
| 1994 | 8.2 C | -0.26 C |
| 1995 | 8.4 C | -0.02 C |
| 1996 | 9.1 C | +0.63 C |
| 1997 | 8.1 C | -0.28 C |
| 1998 | 5.7 C | -2.68 C |
| 1999 | 7.3 C | -1.16 C |
| 2000 | 8.6 C | +0.13 C |
| 2001 | 8.7 C | +0.29 C |
| 2004 | 9.0 C | +0.53 C |
| 2006 | 8.5 C | +0.10 C |
| 2009 | 8.7 C | +0.27 C |
| 2010 | 8.2 C | -0.19 C |
| 2011 | 7.9 C | -0.54 C |
| 2012 | 8.8 C | +0.35 C |
| 2013 | 8.8 C | +0.37 C |
| 2014 | 10.2 C | +1.77 C |
| 2015 | 10.2 C | +1.76 C |
| 2016 | 9.2 C | +0.76 C |
| 2017 | 9.2 C | +0.81 C |
| 2018 | 9.2 C | +0.76 C |
| 2019 | 8.3 C | -0.14 C |
| 2020 | 9.5 C | +1.09 C |
| 2022 | 9.3 C | +0.92 C |
| 2024 | 11.4 C | +2.98 C |
The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1958 to 2024. In Fahrenheit: 0.4 F (0.2 to 0.6) per decade. The slope is a straight line fitted to 57 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 | 1958 to 2024 | 57 | Rise |
| Mean daily maximum | -0.02 C (-0.18 to 0.14) per decade | -0.03 F (-0.32 to 0.25) per decade | 1958 to 2024 | 57 | Not clearly different from zero |
| Mean daily minimum | 0.5 C (0.4 to 0.6) per decade | 0.9 F (0.7 to 1.0) per decade | 1958 to 2024 | 57 | 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
1909 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 41.1 C (106.0 F) | 2024 | 35.6 C (96.1 F) | 69 |
| Coldest night (TNn) | -26.7 C (-16.1 F) | 1972 | -16.7 C (1.9 F) | 69 |
| Wettest day (Rx1day) | 152.4 mm (6.0 in) | 2024 | 61.5 mm (2.4 in) | 116 |
| Wettest five days (Rx5day) | 363.5 mm (14.3 in) | 1995 | 126.1 mm (5.0 in) | 116 |
| Longest dry spell (CDD) | 164 days | 2002 | 59 days | 116 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1909 | n/a |
| 1910 | n/a |
| 1911 | n/a |
| 1912 | n/a |
| 1913 | n/a |
| 1914 | n/a |
| 1915 | n/a |
| 1916 | n/a |
| 1917 | n/a |
| 1918 | n/a |
| 1919 | n/a |
| 1920 | n/a |
| 1921 | n/a |
| 1922 | n/a |
| 1923 | n/a |
| 1924 | n/a |
| 1925 | n/a |
| 1926 | n/a |
| 1927 | n/a |
| 1928 | n/a |
| 1929 | n/a |
| 1930 | n/a |
| 1931 | n/a |
| 1932 | n/a |
| 1933 | n/a |
| 1934 | n/a |
| 1935 | n/a |
| 1936 | n/a |
| 1937 | n/a |
| 1938 | n/a |
| 1939 | n/a |
| 1940 | n/a |
| 1941 | n/a |
| 1942 | n/a |
| 1943 | n/a |
| 1944 | n/a |
| 1945 | n/a |
| 1946 | n/a |
| 1947 | n/a |
| 1948 | n/a |
| 1949 | n/a |
| 1950 | n/a |
| 1951 | n/a |
| 1952 | n/a |
| 1953 | n/a |
| 1954 | n/a |
| 1955 | n/a |
| 1956 | n/a |
| 1957 | 35.6 C (96.1 F) |
| 1958 | 33.9 C (93.0 F) |
| 1959 | 36.1 C (97.0 F) |
| 1960 | 38.3 C (100.9 F) |
| 1961 | 37.8 C (100.0 F) |
| 1962 | 34.4 C (93.9 F) |
| 1963 | 33.9 C (93.0 F) |
| 1964 | 35.0 C (95.0 F) |
| 1965 | 32.8 C (91.0 F) |
| 1966 | 35.0 C (95.0 F) |
| 1967 | 35.6 C (96.1 F) |
| 1968 | 35.0 C (95.0 F) |
| 1969 | 33.9 C (93.0 F) |
| 1970 | 35.0 C (95.0 F) |
| 1971 | 37.8 C (100.0 F) |
| 1972 | 39.4 C (102.9 F) |
| 1973 | 36.1 C (97.0 F) |
| 1974 | 34.4 C (93.9 F) |
| 1975 | 35.0 C (95.0 F) |
| 1976 | 33.9 C (93.0 F) |
| 1977 | 36.1 C (97.0 F) |
| 1978 | 35.6 C (96.1 F) |
| 1979 | 35.0 C (95.0 F) |
| 1980 | 36.7 C (98.1 F) |
| 1981 | 37.8 C (100.0 F) |
| 1982 | 34.4 C (93.9 F) |
| 1983 | 34.4 C (93.9 F) |
| 1984 | 35.6 C (96.1 F) |
| 1985 | 35.6 C (96.1 F) |
| 1986 | 33.9 C (93.0 F) |
| 1987 | 36.7 C (98.1 F) |
| 1988 | 37.2 C (99.0 F) |
| 1989 | 33.3 C (91.9 F) |
| 1990 | 36.1 C (97.0 F) |
| 1991 | 35.6 C (96.1 F) |
| 1992 | 36.7 C (98.1 F) |
| 1993 | 35.0 C (95.0 F) |
| 1994 | 35.6 C (96.1 F) |
| 1995 | 33.3 C (91.9 F) |
| 1996 | 34.4 C (93.9 F) |
| 1997 | 35.6 C (96.1 F) |
| 1998 | 32.8 C (91.0 F) |
| 1999 | 33.3 C (91.9 F) |
| 2000 | 34.4 C (93.9 F) |
| 2001 | 35.0 C (95.0 F) |
| 2002 | 40.0 C (104.0 F) |
| 2003 | 37.8 C (100.0 F) |
| 2004 | 34.4 C (93.9 F) |
| 2005 | 36.1 C (97.0 F) |
| 2006 | 36.1 C (97.0 F) |
| 2007 | 37.8 C (100.0 F) |
| 2008 | 37.2 C (99.0 F) |
| 2009 | 35.6 C (96.1 F) |
| 2010 | 34.4 C (93.9 F) |
| 2011 | 33.9 C (93.0 F) |
| 2012 | 35.6 C (96.1 F) |
| 2013 | 37.2 C (99.0 F) |
| 2014 | 37.2 C (99.0 F) |
| 2015 | 36.1 C (97.0 F) |
| 2016 | 36.1 C (97.0 F) |
| 2017 | 37.2 C (99.0 F) |
| 2018 | 35.0 C (95.0 F) |
| 2019 | 35.6 C (96.1 F) |
| 2020 | 36.7 C (98.1 F) |
| 2021 | 37.8 C (100.0 F) |
| 2022 | 37.8 C (100.0 F) |
| 2023 | 25.0 C (77.0 F) |
| 2024 | 41.1 C (106.0 F) |
| 2025 | 35.6 C (96.1 F) |
| 2026 | n/a |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1909 | n/a |
| 1910 | n/a |
| 1911 | n/a |
| 1912 | n/a |
| 1913 | n/a |
| 1914 | n/a |
| 1915 | n/a |
| 1916 | n/a |
| 1917 | n/a |
| 1918 | n/a |
| 1919 | n/a |
| 1920 | n/a |
| 1921 | n/a |
| 1922 | n/a |
| 1923 | n/a |
| 1924 | n/a |
| 1925 | n/a |
| 1926 | n/a |
| 1927 | n/a |
| 1928 | n/a |
| 1929 | n/a |
| 1930 | n/a |
| 1931 | n/a |
| 1932 | n/a |
| 1933 | n/a |
| 1934 | n/a |
| 1935 | n/a |
| 1936 | n/a |
| 1937 | n/a |
| 1938 | n/a |
| 1939 | n/a |
| 1940 | n/a |
| 1941 | n/a |
| 1942 | n/a |
| 1943 | n/a |
| 1944 | n/a |
| 1945 | n/a |
| 1946 | n/a |
| 1947 | n/a |
| 1948 | n/a |
| 1949 | n/a |
| 1950 | n/a |
| 1951 | n/a |
| 1952 | n/a |
| 1953 | n/a |
| 1954 | n/a |
| 1955 | n/a |
| 1956 | n/a |
| 1957 | -15.0 C (5.0 F) |
| 1958 | -13.9 C (7.0 F) |
| 1959 | -17.8 C (0.0 F) |
| 1960 | -22.2 C (-8.0 F) |
| 1961 | -20.0 C (-4.0 F) |
| 1962 | -23.9 C (-11.0 F) |
| 1963 | -15.6 C (3.9 F) |
| 1964 | -16.1 C (3.0 F) |
| 1965 | -18.3 C (-0.9 F) |
| 1966 | -19.4 C (-2.9 F) |
| 1967 | -17.2 C (1.0 F) |
| 1968 | -21.7 C (-7.1 F) |
| 1969 | -21.7 C (-7.1 F) |
| 1970 | -19.4 C (-2.9 F) |
| 1971 | -21.1 C (-6.0 F) |
| 1972 | -26.7 C (-16.1 F) |
| 1973 | -20.0 C (-4.0 F) |
| 1974 | -17.8 C (0.0 F) |
| 1975 | -16.7 C (1.9 F) |
| 1976 | -15.0 C (5.0 F) |
| 1977 | -18.9 C (-2.0 F) |
| 1978 | -20.0 C (-4.0 F) |
| 1979 | -22.2 C (-8.0 F) |
| 1980 | -15.0 C (5.0 F) |
| 1981 | -14.4 C (6.1 F) |
| 1982 | -18.9 C (-2.0 F) |
| 1983 | -16.1 C (3.0 F) |
| 1984 | -17.2 C (1.0 F) |
| 1985 | -17.8 C (0.0 F) |
| 1986 | -11.1 C (12.0 F) |
| 1987 | -17.8 C (0.0 F) |
| 1988 | -21.1 C (-6.0 F) |
| 1989 | -23.3 C (-9.9 F) |
| 1990 | -26.7 C (-16.1 F) |
| 1991 | -17.8 C (0.0 F) |
| 1992 | -17.8 C (0.0 F) |
| 1993 | -23.3 C (-9.9 F) |
| 1994 | -15.6 C (3.9 F) |
| 1995 | -13.3 C (8.1 F) |
| 1996 | -15.6 C (3.9 F) |
| 1997 | -14.4 C (6.1 F) |
| 1998 | -21.1 C (-6.0 F) |
| 1999 | -15.6 C (3.9 F) |
| 2000 | -12.2 C (10.0 F) |
| 2001 | -16.1 C (3.0 F) |
| 2002 | -18.9 C (-2.0 F) |
| 2003 | -12.2 C (10.0 F) |
| 2004 | -17.2 C (1.0 F) |
| 2005 | -13.9 C (7.0 F) |
| 2006 | -15.6 C (3.9 F) |
| 2007 | -14.4 C (6.1 F) |
| 2008 | -17.2 C (1.0 F) |
| 2009 | -17.2 C (1.0 F) |
| 2010 | -15.6 C (3.9 F) |
| 2011 | -15.0 C (5.0 F) |
| 2012 | -16.7 C (1.9 F) |
| 2013 | -21.7 C (-7.1 F) |
| 2014 | -8.9 C (16.0 F) |
| 2015 | -14.4 C (6.1 F) |
| 2016 | -15.6 C (3.9 F) |
| 2017 | -16.7 C (1.9 F) |
| 2018 | -14.4 C (6.1 F) |
| 2019 | -15.6 C (3.9 F) |
| 2020 | -12.2 C (10.0 F) |
| 2021 | -15.6 C (3.9 F) |
| 2022 | -16.7 C (1.9 F) |
| 2023 | -16.7 C (1.9 F) |
| 2024 | -15.6 C (3.9 F) |
| 2025 | -7.8 C (18.0 F) |
| 2026 | n/a |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1909 | n/a |
| 1910 | 36.3 mm (1.4 in) |
| 1911 | 68.6 mm (2.7 in) |
| 1912 | 47.0 mm (1.9 in) |
| 1913 | 71.1 mm (2.8 in) |
| 1914 | 45.7 mm (1.8 in) |
| 1915 | 50.8 mm (2.0 in) |
| 1916 | 88.9 mm (3.5 in) |
| 1917 | 32.5 mm (1.3 in) |
| 1918 | 42.4 mm (1.7 in) |
| 1919 | 33.0 mm (1.3 in) |
| 1920 | 61.5 mm (2.4 in) |
| 1921 | 85.9 mm (3.4 in) |
| 1922 | 79.0 mm (3.1 in) |
| 1923 | 27.9 mm (1.1 in) |
| 1924 | 34.5 mm (1.4 in) |
| 1925 | 39.4 mm (1.6 in) |
| 1926 | 67.1 mm (2.6 in) |
| 1927 | 57.7 mm (2.3 in) |
| 1928 | 61.0 mm (2.4 in) |
| 1929 | 72.4 mm (2.9 in) |
| 1930 | 39.4 mm (1.6 in) |
| 1931 | 44.2 mm (1.7 in) |
| 1932 | 41.7 mm (1.6 in) |
| 1933 | 48.3 mm (1.9 in) |
| 1934 | 55.9 mm (2.2 in) |
| 1935 | 46.5 mm (1.8 in) |
| 1936 | 46.0 mm (1.8 in) |
| 1937 | 90.4 mm (3.6 in) |
| 1938 | 39.4 mm (1.6 in) |
| 1939 | 43.2 mm (1.7 in) |
| 1940 | 81.0 mm (3.2 in) |
| 1941 | 53.8 mm (2.1 in) |
| 1942 | 66.8 mm (2.6 in) |
| 1943 | 72.4 mm (2.9 in) |
| 1944 | 49.8 mm (2.0 in) |
| 1945 | 57.2 mm (2.3 in) |
| 1946 | 47.0 mm (1.9 in) |
| 1947 | 63.8 mm (2.5 in) |
| 1948 | 71.1 mm (2.8 in) |
| 1949 | 52.6 mm (2.1 in) |
| 1950 | 103.1 mm (4.1 in) |
| 1951 | 65.8 mm (2.6 in) |
| 1952 | 71.1 mm (2.8 in) |
| 1953 | 42.4 mm (1.7 in) |
| 1954 | 67.1 mm (2.6 in) |
| 1955 | 98.8 mm (3.9 in) |
| 1956 | 80.8 mm (3.2 in) |
| 1957 | 63.0 mm (2.5 in) |
| 1958 | 66.3 mm (2.6 in) |
| 1959 | 63.2 mm (2.5 in) |
| 1960 | 61.5 mm (2.4 in) |
| 1961 | 63.5 mm (2.5 in) |
| 1962 | 149.9 mm (5.9 in) |
| 1963 | 48.8 mm (1.9 in) |
| 1964 | 82.0 mm (3.2 in) |
| 1965 | 72.4 mm (2.9 in) |
| 1966 | 47.5 mm (1.9 in) |
| 1967 | 78.5 mm (3.1 in) |
| 1968 | 72.6 mm (2.9 in) |
| 1969 | 96.3 mm (3.8 in) |
| 1970 | 72.9 mm (2.9 in) |
| 1971 | 65.5 mm (2.6 in) |
| 1972 | 27.2 mm (1.1 in) |
| 1973 | 75.4 mm (3.0 in) |
| 1974 | 85.9 mm (3.4 in) |
| 1975 | 69.3 mm (2.7 in) |
| 1976 | 45.0 mm (1.8 in) |
| 1977 | 36.8 mm (1.4 in) |
| 1978 | 73.4 mm (2.9 in) |
| 1979 | 77.5 mm (3.1 in) |
| 1980 | 76.2 mm (3.0 in) |
| 1981 | 53.1 mm (2.1 in) |
| 1982 | 79.0 mm (3.1 in) |
| 1983 | 70.9 mm (2.8 in) |
| 1984 | 48.8 mm (1.9 in) |
| 1985 | 40.4 mm (1.6 in) |
| 1986 | 67.8 mm (2.7 in) |
| 1987 | 55.9 mm (2.2 in) |
| 1988 | 42.9 mm (1.7 in) |
| 1989 | 62.0 mm (2.4 in) |
| 1990 | 53.6 mm (2.1 in) |
| 1991 | 43.7 mm (1.7 in) |
| 1992 | 48.5 mm (1.9 in) |
| 1993 | 65.3 mm (2.6 in) |
| 1994 | 51.8 mm (2.0 in) |
| 1995 | 127.5 mm (5.0 in) |
| 1996 | 51.1 mm (2.0 in) |
| 1997 | 88.9 mm (3.5 in) |
| 1998 | 62.2 mm (2.4 in) |
| 1999 | 54.6 mm (2.1 in) |
| 2000 | 43.4 mm (1.7 in) |
| 2001 | 50.8 mm (2.0 in) |
| 2002 | 71.1 mm (2.8 in) |
| 2003 | 63.5 mm (2.5 in) |
| 2004 | 60.2 mm (2.4 in) |
| 2005 | 63.2 mm (2.5 in) |
| 2006 | 62.2 mm (2.4 in) |
| 2007 | 54.1 mm (2.1 in) |
| 2008 | 45.5 mm (1.8 in) |
| 2009 | 50.5 mm (2.0 in) |
| 2010 | 50.0 mm (2.0 in) |
| 2011 | 42.4 mm (1.7 in) |
| 2012 | 96.5 mm (3.8 in) |
| 2013 | 24.1 mm (0.9 in) |
| 2014 | 87.6 mm (3.4 in) |
| 2015 | 57.9 mm (2.3 in) |
| 2016 | 60.5 mm (2.4 in) |
| 2017 | 58.9 mm (2.3 in) |
| 2018 | 44.7 mm (1.8 in) |
| 2019 | 69.1 mm (2.7 in) |
| 2020 | 63.5 mm (2.5 in) |
| 2021 | 105.4 mm (4.1 in) |
| 2022 | 48.3 mm (1.9 in) |
| 2023 | 102.9 mm (4.1 in) |
| 2024 | 152.4 mm (6.0 in) |
| 2025 | 71.1 mm (2.8 in) |
| 2026 | n/a |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1909 | n/a |
| 1910 | 65.6 mm (2.6 in) |
| 1911 | 214.9 mm (8.5 in) |
| 1912 | 81.3 mm (3.2 in) |
| 1913 | 125.8 mm (5.0 in) |
| 1914 | 131.5 mm (5.2 in) |
| 1915 | 96.3 mm (3.8 in) |
| 1916 | 135.9 mm (5.4 in) |
| 1917 | 91.0 mm (3.6 in) |
| 1918 | 80.7 mm (3.2 in) |
| 1919 | 86.6 mm (3.4 in) |
| 1920 | 112.6 mm (4.4 in) |
| 1921 | 142.8 mm (5.6 in) |
| 1922 | 131.3 mm (5.2 in) |
| 1923 | 57.4 mm (2.3 in) |
| 1924 | 58.8 mm (2.3 in) |
| 1925 | 96.9 mm (3.8 in) |
| 1926 | 193.9 mm (7.6 in) |
| 1927 | 115.8 mm (4.6 in) |
| 1928 | 161.3 mm (6.4 in) |
| 1929 | 195.3 mm (7.7 in) |
| 1930 | 74.4 mm (2.9 in) |
| 1931 | 108.7 mm (4.3 in) |
| 1932 | 57.1 mm (2.2 in) |
| 1933 | 91.4 mm (3.6 in) |
| 1934 | 140.4 mm (5.5 in) |
| 1935 | 82.8 mm (3.3 in) |
| 1936 | 140.8 mm (5.5 in) |
| 1937 | 169.2 mm (6.7 in) |
| 1938 | 124.0 mm (4.9 in) |
| 1939 | 102.4 mm (4.0 in) |
| 1940 | 190.6 mm (7.5 in) |
| 1941 | 146.3 mm (5.8 in) |
| 1942 | 158.5 mm (6.2 in) |
| 1943 | 202.4 mm (8.0 in) |
| 1944 | 103.6 mm (4.1 in) |
| 1945 | 139.3 mm (5.5 in) |
| 1946 | 92.0 mm (3.6 in) |
| 1947 | 74.2 mm (2.9 in) |
| 1948 | 138.5 mm (5.5 in) |
| 1949 | 79.2 mm (3.1 in) |
| 1950 | 164.2 mm (6.5 in) |
| 1951 | 150.7 mm (5.9 in) |
| 1952 | 151.4 mm (6.0 in) |
| 1953 | 96.0 mm (3.8 in) |
| 1954 | 125.0 mm (4.9 in) |
| 1955 | 230.1 mm (9.1 in) |
| 1956 | 226.3 mm (8.9 in) |
| 1957 | 144.7 mm (5.7 in) |
| 1958 | 118.9 mm (4.7 in) |
| 1959 | 119.6 mm (4.7 in) |
| 1960 | 118.9 mm (4.7 in) |
| 1961 | 130.6 mm (5.1 in) |
| 1962 | 348.0 mm (13.7 in) |
| 1963 | 137.5 mm (5.4 in) |
| 1964 | 241.0 mm (9.5 in) |
| 1965 | 162.6 mm (6.4 in) |
| 1966 | 124.8 mm (4.9 in) |
| 1967 | 173.5 mm (6.8 in) |
| 1968 | 139.9 mm (5.5 in) |
| 1969 | 150.5 mm (5.9 in) |
| 1970 | 173.2 mm (6.8 in) |
| 1971 | 115.4 mm (4.5 in) |
| 1972 | 70.9 mm (2.8 in) |
| 1973 | 120.1 mm (4.7 in) |
| 1974 | 165.4 mm (6.5 in) |
| 1975 | 186.6 mm (7.3 in) |
| 1976 | 53.4 mm (2.1 in) |
| 1977 | 96.1 mm (3.8 in) |
| 1978 | 174.9 mm (6.9 in) |
| 1979 | 151.2 mm (6.0 in) |
| 1980 | 193.2 mm (7.6 in) |
| 1981 | 156.3 mm (6.2 in) |
| 1982 | 113.8 mm (4.5 in) |
| 1983 | 189.4 mm (7.5 in) |
| 1984 | 80.3 mm (3.2 in) |
| 1985 | 87.7 mm (3.5 in) |
| 1986 | 230.4 mm (9.1 in) |
| 1987 | 118.2 mm (4.7 in) |
| 1988 | 92.9 mm (3.7 in) |
| 1989 | 140.4 mm (5.5 in) |
| 1990 | 108.4 mm (4.3 in) |
| 1991 | 132.4 mm (5.2 in) |
| 1992 | 134.3 mm (5.3 in) |
| 1993 | 154.1 mm (6.1 in) |
| 1994 | 105.4 mm (4.1 in) |
| 1995 | 363.5 mm (14.3 in) |
| 1996 | 121.5 mm (4.8 in) |
| 1997 | 174.1 mm (6.9 in) |
| 1998 | 119.6 mm (4.7 in) |
| 1999 | 102.1 mm (4.0 in) |
| 2000 | 95.8 mm (3.8 in) |
| 2001 | 60.9 mm (2.4 in) |
| 2002 | 143.2 mm (5.6 in) |
| 2003 | 94.0 mm (3.7 in) |
| 2004 | 118.4 mm (4.7 in) |
| 2005 | 138.1 mm (5.4 in) |
| 2006 | 133.3 mm (5.2 in) |
| 2007 | 99.5 mm (3.9 in) |
| 2008 | 114.2 mm (4.5 in) |
| 2009 | 108.4 mm (4.3 in) |
| 2010 | 151.0 mm (5.9 in) |
| 2011 | 124.4 mm (4.9 in) |
| 2012 | 168.2 mm (6.6 in) |
| 2013 | 40.6 mm (1.6 in) |
| 2014 | 147.8 mm (5.8 in) |
| 2015 | 83.1 mm (3.3 in) |
| 2016 | 114.3 mm (4.5 in) |
| 2017 | 197.5 mm (7.8 in) |
| 2018 | 90.2 mm (3.6 in) |
| 2019 | 141.2 mm (5.6 in) |
| 2020 | 151.3 mm (6.0 in) |
| 2021 | 176.9 mm (7.0 in) |
| 2022 | 80.5 mm (3.2 in) |
| 2023 | 126.3 mm (5.0 in) |
| 2024 | 315.3 mm (12.4 in) |
| 2025 | 109.2 mm (4.3 in) |
| 2026 | n/a |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1909 | n/a |
| 1910 | 45 days |
| 1911 | 44 days |
| 1912 | 38 days |
| 1913 | 31 days |
| 1914 | 70 days |
| 1915 | 52 days |
| 1916 | 56 days |
| 1917 | 18 days |
| 1918 | 11 days |
| 1919 | 9 days |
| 1920 | 16 days |
| 1921 | 21 days |
| 1922 | 1 day |
| 1923 | 46 days |
| 1924 | 22 days |
| 1925 | 20 days |
| 1926 | 68 days |
| 1927 | 82 days |
| 1928 | 134 days |
| 1929 | 112 days |
| 1930 | 117 days |
| 1931 | 101 days |
| 1932 | 76 days |
| 1933 | 75 days |
| 1934 | 53 days |
| 1935 | 106 days |
| 1936 | 100 days |
| 1937 | 85 days |
| 1938 | 105 days |
| 1939 | 32 days |
| 1940 | 30 days |
| 1941 | 43 days |
| 1942 | 130 days |
| 1943 | 78 days |
| 1944 | 55 days |
| 1945 | 40 days |
| 1946 | 59 days |
| 1947 | 72 days |
| 1948 | 77 days |
| 1949 | 82 days |
| 1950 | 75 days |
| 1951 | 62 days |
| 1952 | 40 days |
| 1953 | 61 days |
| 1954 | 70 days |
| 1955 | 71 days |
| 1956 | 33 days |
| 1957 | 108 days |
| 1958 | 32 days |
| 1959 | 63 days |
| 1960 | 63 days |
| 1961 | 25 days |
| 1962 | 49 days |
| 1963 | 41 days |
| 1964 | 55 days |
| 1965 | 53 days |
| 1966 | 97 days |
| 1967 | 89 days |
| 1968 | 52 days |
| 1969 | 94 days |
| 1970 | 110 days |
| 1971 | 91 days |
| 1972 | 41 days |
| 1973 | 45 days |
| 1974 | 64 days |
| 1975 | 59 days |
| 1976 | 47 days |
| 1977 | 53 days |
| 1978 | 57 days |
| 1979 | 40 days |
| 1980 | 42 days |
| 1981 | 113 days |
| 1982 | 29 days |
| 1983 | 68 days |
| 1984 | 37 days |
| 1985 | 49 days |
| 1986 | 54 days |
| 1987 | 55 days |
| 1988 | 76 days |
| 1989 | 52 days |
| 1990 | 45 days |
| 1991 | 41 days |
| 1992 | 50 days |
| 1993 | 69 days |
| 1994 | 97 days |
| 1995 | 114 days |
| 1996 | 46 days |
| 1997 | 26 days |
| 1998 | 60 days |
| 1999 | 66 days |
| 2000 | 66 days |
| 2001 | 64 days |
| 2002 | 164 days |
| 2003 | 54 days |
| 2004 | 80 days |
| 2005 | 71 days |
| 2006 | 84 days |
| 2007 | 62 days |
| 2008 | 64 days |
| 2009 | 66 days |
| 2010 | 51 days |
| 2011 | 97 days |
| 2012 | 137 days |
| 2013 | 60 days |
| 2014 | 49 days |
| 2015 | 26 days |
| 2016 | 95 days |
| 2017 | 48 days |
| 2018 | 107 days |
| 2019 | 63 days |
| 2020 | 47 days |
| 2021 | 44 days |
| 2022 | 85 days |
| 2023 | 20 days |
| 2024 | 108 days |
| 2025 | 26 days |
| 2026 | n/a |
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
57 years with a frostAcross 57 years with a frost, the median last spring frost at Chester falls on 9 June and the median first autumn frost on 16 September, which leaves a median of 106 days between them.
Fitted over all years, the growing season changes by +14.8 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1988 to 2024) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 9 June | n/a | 31 May | n/a | -3.8 days per decade |
| First autumn frost | 16 September | n/a | 23 September | n/a | +11.0 days per decade |
| Growing days | 106 days | n/a | 116 days | n/a | +14.8 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
96 years, 1911 to 2024A day with at least 60.1 mm (2.4 in) of rain is expected about once in 2 years. A day with at least 134.9 mm (5.3 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 60.1 mm (2.4 in) | |
| 5 years | 78.1 mm (3.1 in) | |
| 10 years | 90.9 mm (3.6 in) | |
| 25 years | 107.8 mm (4.2 in) | |
| 50 years | 121.1 mm (4.8 in) | |
| 100 years | 134.9 mm (5.3 in) | Longer than the 96 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, 96 years of values from 1911 to 2024.
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: 152.4 mm (6.0 in) in 2024; 149.9 mm (5.9 in) in 1962; 127.5 mm (5.0 in) in 1995.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Chester, at 1996. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1996 ran 0.3 C (0.6 F) lower than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1996 | -0.3 | -0.6 | likely | 5 |
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Climate Twins
2006 to 2024 against 1961 to 1990Over 2006 to 2024, Chester had a mean temperature of 9.2 C (48.5 F) and 838.1 mm (33.0 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Mt Shasta (United States, 145 km away), McNary 2N (United States, 1,219 km away) and Weed Fire Dept (United States, 158 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Mt Shasta | United States | 145 km (90 mi) | 9.7 C (49.4 F) | 941.1 mm (37.1 in) | 1.06 |
| McNary 2N | United States | 1,219 km (757 mi) | 8.5 C (47.3 F) | 719.6 mm (28.3 in) | 1.21 |
| Weed Fire Dept | United States | 158 km (98 mi) | 9.1 C (48.5 F) | 626.4 mm (24.7 in) | 1.29 |
Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.
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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2025-12-31).