Stockton AP Weather Records (USW00023237)
Record envelope, standing records and threshold days for Stockton AP (USW00023237), California, United States, with 79 years of record.
Key Facts for Stockton AP
- Stockton AP (USW00023237) is a weather station in California, United States at 37.89 latitude and -121.23 longitude, 8 m (27 ft) above sea level.
- The station reports from 1948 to 2026, 79 years of record.
- 1,464 records set at Stockton AP still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Stockton AP tied a daily record high maximum temperature of 38.3 C (100.9 F) on 7 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, 37.89 latitude, -121.23 longitude.
- Elevation: 8 m (27 ft).
- Period of record: 1948 to 2026, 79 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
14 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 25.6 C (78.1 F) | -8.9 C (16.0 F) | 18.3 C (64.9 F) | -0.6 C (30.9 F) |
| Feb | 26.1 C (79.0 F) | -5.6 C (21.9 F) | 26.1 C (79.0 F) | -0.6 C (30.9 F) |
| Mar | 32.2 C (90.0 F) | -2.8 C (27.0 F) | 32.2 C (90.0 F) | 2.8 C (37.0 F) |
| Apr | 37.8 C (100.0 F) | 0.0 C (32.0 F) | 30.0 C (86.0 F) | 3.9 C (39.0 F) |
| May | 41.7 C (107.1 F) | 2.2 C (36.0 F) | 35.6 C (96.1 F) | 7.2 C (45.0 F) |
| Jun | 43.9 C (111.0 F) | 7.2 C (45.0 F) | 38.9 C (102.0 F) | 11.7 C (53.1 F) |
| Jul | 46.1 C (115.0 F) | 9.4 C (48.9 F) | 40.6 C (105.1 F) | 11.7 C (53.1 F) |
| Aug | 45.0 C (113.0 F) | 8.3 C (46.9 F) | 40.6 C (105.1 F) | 13.9 C (57.0 F) |
| Sep | 46.1 C (115.0 F) | 5.6 C (42.1 F) | 41.1 C (106.0 F) | 10.0 C (50.0 F) |
| Oct | 40.6 C (105.1 F) | 0.6 C (33.1 F) | 38.9 C (102.0 F) | 7.8 C (46.0 F) |
| Nov | 29.4 C (84.9 F) | -3.9 C (25.0 F) | n/a | n/a |
| Dec | 24.4 C (75.9 F) | -8.3 C (17.1 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1948 | 1 |
| 1949 | 33 |
| 1950 | 33 |
| 1951 | 23 |
| 1952 | 21 |
| 1953 | 14 |
| 1954 | 21 |
| 1955 | 51 |
| 1956 | 19 |
| 1957 | 17 |
| 1958 | 15 |
| 1959 | 21 |
| 1960 | 23 |
| 1961 | 36 |
| 1962 | 16 |
| 1963 | 41 |
| 1964 | 28 |
| 1965 | 21 |
| 1966 | 16 |
| 1967 | 24 |
| 1968 | 22 |
| 1969 | 14 |
| 1970 | 12 |
| 1971 | 20 |
| 1972 | 29 |
| 1973 | 22 |
| 1974 | 13 |
| 1975 | 18 |
| 1976 | 24 |
| 1977 | 15 |
| 1978 | 16 |
| 1979 | 10 |
| 1980 | 22 |
| 1981 | 15 |
| 1982 | 19 |
| 1983 | 16 |
| 1984 | 13 |
| 1985 | 30 |
| 1986 | 16 |
| 1987 | 22 |
| 1988 | 17 |
| 1989 | 16 |
| 1990 | 21 |
| 1991 | 22 |
| 1992 | 12 |
| 1993 | 9 |
| 1994 | 6 |
| 1995 | 30 |
| 1996 | 24 |
| 1997 | 12 |
| 1998 | 20 |
| 1999 | 20 |
| 2000 | 24 |
| 2001 | 10 |
| 2002 | 11 |
| 2003 | 6 |
| 2004 | 11 |
| 2005 | 8 |
| 2006 | 17 |
| 2007 | 20 |
| 2008 | 13 |
| 2009 | 14 |
| 2010 | 16 |
| 2011 | 18 |
| 2012 | 15 |
| 2013 | 10 |
| 2014 | 12 |
| 2015 | 20 |
| 2016 | 10 |
| 2017 | 35 |
| 2018 | 17 |
| 2019 | 13 |
| 2020 | 28 |
| 2021 | 8 |
| 2022 | 21 |
| 2023 | 12 |
| 2024 | 21 |
| 2025 | 9 |
| 2026 | 14 |
All-Time Record Progression
2 new records| Date | Kind | Detail |
|---|---|---|
| 2006-07-23 | Record high maximum temperature | Record high maximum temperature 46.1 C (115.0 F) |
| 2006-07-23 | Record high minimum temperature | Record high minimum temperature 27.8 C (82.0 F) |
Wettest Day of Each Month
Jan: 76.5 mm (3.0 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 76.5 mm (3.0 in) | 21 January 1967 |
| Feb | 46.0 mm (1.8 in) | 16 February 2026 |
| Mar | 39.1 mm (1.5 in) | 21 March 1978 |
| Apr | 38.1 mm (1.5 in) | 27 April 1954 |
| May | 42.2 mm (1.7 in) | 27 May 1990 |
| Jun | 10.9 mm (0.4 in) | 5 June 2011 |
| Jul | 12.7 mm (0.5 in) | 2 July 1980 |
| Aug | 20.6 mm (0.8 in) | 18 August 1975 |
| Sep | 67.1 mm (2.6 in) | 18 September 1959 |
| Oct | 65.8 mm (2.6 in) | 24 October 2021 |
| Nov | 55.4 mm (2.2 in) | 18 November 1950 |
| Dec | 72.4 mm (2.9 in) | 31 December 2022 |
Period of Record Coverage
1948 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1948 | 92 | 25% | No |
| 1949 | 365 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 353 | 97% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 365 | 100% | Yes |
| 1983 | 365 | 100% | Yes |
| 1984 | 366 | 100% | Yes |
| 1985 | 365 | 100% | Yes |
| 1986 | 365 | 100% | Yes |
| 1987 | 365 | 100% | Yes |
| 1988 | 366 | 100% | Yes |
| 1989 | 365 | 100% | Yes |
| 1990 | 364 | 100% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 366 | 100% | Yes |
| 1993 | 365 | 100% | Yes |
| 1994 | 365 | 100% | Yes |
| 1995 | 365 | 100% | Yes |
| 1996 | 366 | 100% | Yes |
| 1997 | 365 | 100% | Yes |
| 1998 | 365 | 100% | Yes |
| 1999 | 365 | 100% | Yes |
| 2000 | 366 | 100% | Yes |
| 2001 | 365 | 100% | Yes |
| 2002 | 365 | 100% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 366 | 100% | Yes |
| 2005 | 365 | 100% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 365 | 100% | Yes |
| 2008 | 366 | 100% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 365 | 100% | Yes |
| 2011 | 365 | 100% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 365 | 100% | Yes |
| 2015 | 365 | 100% | Yes |
| 2016 | 364 | 99% | Yes |
| 2017 | 364 | 100% | Yes |
| 2018 | 365 | 100% | Yes |
| 2019 | 365 | 100% | Yes |
| 2020 | 366 | 100% | Yes |
| 2021 | 365 | 100% | Yes |
| 2022 | 365 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 365 | 100% | Yes |
| 2026 | 284 | 78% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 7 October 2026 | Stockton AP, US | daily high max (Tie, Provisional) | 38.3 C (100.9 F) | tie | 1 year | 1 of 100 (Routine) |
| 7 October 2026 | Stockton AP, US | daily high min (Tie, Provisional) | 16.7 C (62.1 F) | tie | 1 year | 1 of 100 (Routine) |
| 6 October 2026 | Stockton AP, US | daily high max (Tie, Provisional) | 37.8 C (100.0 F) | tie | 1 year | 1 of 100 (Routine) |
| 5 October 2026 | Stockton AP, US | daily high min (Provisional) | 17.2 C (63.0 F) | 1.1 C (2.0 F) | 61 years | 28 of 100 (Routine) |
| 5 October 2026 | Stockton AP, US | daily high max (Tie, Provisional) | 37.8 C (100.0 F) | tie | 1 year | 1 of 100 (Routine) |
| 28 August 2026 | Stockton AP, US | daily rain (Provisional) | 0.3 mm (0.01 in) | 0.3 mm (0.01 in) | 76 years | 20 of 100 (Routine) |
| 11 June 2026 | Stockton AP, US | daily high min | 20.0 C (68.0 F) | 0.6 C (1.1 F) | 32 years | 18 of 100 (Routine) |
| 29 May 2026 | Stockton AP, US | daily rain | 1.3 mm (0.05 in) | 0.8 mm (0.03 in) | 28 years | 16 of 100 (Routine) |
| 21 April 2026 | Stockton AP, US | daily rain | 30.2 mm (1.2 in) | 11.1 mm (0.4 in) | 71 years | 44 of 100 (Notable) |
| 1 April 2026 | Stockton AP, US | daily high min | 12.2 C (54.0 F) | 0.5 C (0.9 F) | 40 years | 20 of 100 (Routine) |
| 31 March 2026 | Stockton AP, US | daily high min | 13.3 C (55.9 F) | 1.1 C (2.0 F) | 11 years | 13 of 100 (Routine) |
| 29 March 2026 | Stockton AP, US | daily high max | 31.7 C (89.1 F) | 1.7 C (3.1 F) | 11 years | 14 of 100 (Routine) |
| 28 March 2026 | Stockton AP, US | daily high max | 29.4 C (84.9 F) | 0.5 C (0.9 F) | 73 years | 30 of 100 (Routine) |
| 24 March 2026 | Stockton AP, US | daily high max | 30.0 C (86.0 F) | 1.1 C (2.0 F) | 4 years | 10 of 100 (Routine) |
| 23 March 2026 | Stockton AP, US | daily high max | 30.6 C (87.1 F) | 0.6 C (1.1 F) | 4 years | 9 of 100 (Routine) |
| 21 March 2026 | Stockton AP, US | daily high max | 28.9 C (84.0 F) | 2.2 C (4.0 F) | 65 years | 31 of 100 (Routine) |
| 20 March 2026 | Stockton AP, US | daily high max | 31.1 C (88.0 F) | 2.2 C (4.0 F) | 65 years | 31 of 100 (Routine) |
| 20 March 2026 | Stockton AP, US | daily high min | 12.2 C (54.0 F) | 0.5 C (0.9 F) | 24 years | 15 of 100 (Routine) |
| 19 March 2026 | Stockton AP, US | monthly high max | 32.2 C (90.0 F) | 0.5 C (0.9 F) | 0 years | 18 of 100 (Routine) |
| 19 March 2026 | Stockton AP, US | daily high min (Tie) | 12.2 C (54.0 F) | tie | 36 years | 4 of 100 (Routine) |
Climate Trend
77 complete years, 1949 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1949 | 15.3 C | -1.32 C |
| 1950 | 16.3 C | -0.28 C |
| 1951 | 15.7 C | -0.91 C |
| 1952 | 16.5 C | -0.05 C |
| 1953 | 16.2 C | -0.36 C |
| 1954 | 15.3 C | -1.33 C |
| 1955 | 15.0 C | -1.64 C |
| 1956 | 15.4 C | -1.24 C |
| 1957 | 15.9 C | -0.70 C |
| 1958 | 16.8 C | +0.23 C |
| 1959 | 16.9 C | +0.33 C |
| 1960 | 16.9 C | +0.29 C |
| 1961 | 16.5 C | -0.08 C |
| 1962 | 16.1 C | -0.52 C |
| 1963 | 15.4 C | -1.24 C |
| 1964 | 15.9 C | -0.71 C |
| 1965 | 16.0 C | -0.64 C |
| 1966 | 16.6 C | +0.03 C |
| 1967 | 16.2 C | -0.36 C |
| 1968 | 15.9 C | -0.73 C |
| 1969 | 16.1 C | -0.45 C |
| 1970 | 16.8 C | +0.21 C |
| 1971 | 15.9 C | -0.66 C |
| 1972 | 16.2 C | -0.35 C |
| 1973 | 16.7 C | +0.09 C |
| 1974 | 16.6 C | +0.00 C |
| 1975 | 15.5 C | -1.12 C |
| 1976 | 16.2 C | -0.36 C |
| 1977 | 17.3 C | +0.73 C |
| 1978 | 17.0 C | +0.39 C |
| 1979 | 17.4 C | +0.78 C |
| 1980 | 16.8 C | +0.23 C |
| 1981 | 17.5 C | +0.88 C |
| 1982 | 15.5 C | -1.05 C |
| 1983 | 16.9 C | +0.33 C |
| 1984 | 16.9 C | +0.30 C |
| 1985 | 15.4 C | -1.16 C |
| 1986 | 16.8 C | +0.18 C |
| 1987 | 16.8 C | +0.16 C |
| 1988 | 16.9 C | +0.29 C |
| 1989 | 16.1 C | -0.54 C |
| 1990 | 16.7 C | +0.14 C |
| 1991 | 16.7 C | +0.10 C |
| 1992 | 17.4 C | +0.81 C |
| 1993 | 16.9 C | +0.29 C |
| 1994 | 16.5 C | -0.10 C |
| 1995 | 17.7 C | +1.12 C |
| 1996 | 17.7 C | +1.15 C |
| 1997 | 17.0 C | +0.37 C |
| 1998 | 15.5 C | -1.08 C |
| 1999 | 15.6 C | -0.97 C |
| 2000 | 16.3 C | -0.34 C |
| 2001 | 16.8 C | +0.20 C |
| 2002 | 16.2 C | -0.44 C |
| 2003 | 16.6 C | +0.00 C |
| 2004 | 16.5 C | -0.09 C |
| 2005 | 17.2 C | +0.61 C |
| 2006 | 16.8 C | +0.21 C |
| 2007 | 17.2 C | +0.63 C |
| 2008 | 16.6 C | +0.03 C |
| 2009 | 16.5 C | -0.14 C |
| 2010 | 15.9 C | -0.66 C |
| 2011 | 15.5 C | -1.05 C |
| 2012 | 16.5 C | -0.07 C |
| 2013 | 16.5 C | -0.06 C |
| 2014 | 18.0 C | +1.39 C |
| 2015 | 17.7 C | +1.07 C |
| 2016 | 17.4 C | +0.80 C |
| 2017 | 17.7 C | +1.15 C |
| 2018 | 17.5 C | +0.92 C |
| 2019 | 17.6 C | +1.05 C |
| 2020 | 18.2 C | +1.64 C |
| 2021 | 16.7 C | +0.12 C |
| 2022 | 17.6 C | +1.00 C |
| 2023 | 16.9 C | +0.31 C |
| 2024 | 18.2 C | +1.56 C |
| 2025 | 17.2 C | +0.58 C |
The annual mean temperature here has risen by 0.2 C (0.1 to 0.2) per decade over 1949 to 2025. In Fahrenheit: 0.3 F (0.2 to 0.4) per decade. The slope is a straight line fitted to 77 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 0.2) per decade | 0.3 F (0.2 to 0.4) per decade | 1949 to 2025 | 77 | Rise |
| Mean daily maximum | 0.2 C (0.2 to 0.3) per decade | 0.4 F (0.3 to 0.6) per decade | 1949 to 2025 | 77 | Rise |
| Mean daily minimum | 0.1 C (0.1 to 0.2) per decade | 0.2 F (0.1 to 0.3) per decade | 1949 to 2025 | 77 | 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
1948 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 46.1 C (115.0 F) | 2006 | 42.2 C (108.0 F) | 79 |
| Coldest night (TNn) | -8.9 C (16.0 F) | 1949 | -3.3 C (26.1 F) | 79 |
| Wettest day (Rx1day) | 76.5 mm (3.0 in) | 1967 | 32.3 mm (1.3 in) | 79 |
| Wettest five days (Rx5day) | 128.8 mm (5.1 in) | 2022 | 62.0 mm (2.4 in) | 79 |
| Longest dry spell (CDD) | 222 days | 2008 | 127 days | 79 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1948 | 32.2 C (90.0 F) |
| 1949 | 39.4 C (102.9 F) |
| 1950 | 43.3 C (109.9 F) |
| 1951 | 40.6 C (105.1 F) |
| 1952 | 42.2 C (108.0 F) |
| 1953 | 41.1 C (106.0 F) |
| 1954 | 42.2 C (108.0 F) |
| 1955 | 41.7 C (107.1 F) |
| 1956 | 42.2 C (108.0 F) |
| 1957 | 41.1 C (106.0 F) |
| 1958 | 39.4 C (102.9 F) |
| 1959 | 41.7 C (107.1 F) |
| 1960 | 43.9 C (111.0 F) |
| 1961 | 45.0 C (113.0 F) |
| 1962 | 41.1 C (106.0 F) |
| 1963 | 39.4 C (102.9 F) |
| 1964 | 42.2 C (108.0 F) |
| 1965 | 40.0 C (104.0 F) |
| 1966 | 42.2 C (108.0 F) |
| 1967 | 41.7 C (107.1 F) |
| 1968 | 41.1 C (106.0 F) |
| 1969 | 40.0 C (104.0 F) |
| 1970 | 41.7 C (107.1 F) |
| 1971 | 42.8 C (109.0 F) |
| 1972 | 45.6 C (114.1 F) |
| 1973 | 43.3 C (109.9 F) |
| 1974 | 41.7 C (107.1 F) |
| 1975 | 42.8 C (109.0 F) |
| 1976 | 41.1 C (106.0 F) |
| 1977 | 42.8 C (109.0 F) |
| 1978 | 42.8 C (109.0 F) |
| 1979 | 42.2 C (108.0 F) |
| 1980 | 43.9 C (111.0 F) |
| 1981 | 42.2 C (108.0 F) |
| 1982 | 40.0 C (104.0 F) |
| 1983 | 42.8 C (109.0 F) |
| 1984 | 42.8 C (109.0 F) |
| 1985 | 40.0 C (104.0 F) |
| 1986 | 38.9 C (102.0 F) |
| 1987 | 39.4 C (102.9 F) |
| 1988 | 42.8 C (109.0 F) |
| 1989 | 41.7 C (107.1 F) |
| 1990 | 41.7 C (107.1 F) |
| 1991 | 42.8 C (109.0 F) |
| 1992 | 40.6 C (105.1 F) |
| 1993 | 41.7 C (107.1 F) |
| 1994 | 40.6 C (105.1 F) |
| 1995 | 42.2 C (108.0 F) |
| 1996 | 42.2 C (108.0 F) |
| 1997 | 41.1 C (106.0 F) |
| 1998 | 42.8 C (109.0 F) |
| 1999 | 42.8 C (109.0 F) |
| 2000 | 41.7 C (107.1 F) |
| 2001 | 42.2 C (108.0 F) |
| 2002 | 43.3 C (109.9 F) |
| 2003 | 41.1 C (106.0 F) |
| 2004 | 39.4 C (102.9 F) |
| 2005 | 42.2 C (108.0 F) |
| 2006 | 46.1 C (115.0 F) |
| 2007 | 43.3 C (109.9 F) |
| 2008 | 41.7 C (107.1 F) |
| 2009 | 43.3 C (109.9 F) |
| 2010 | 42.2 C (108.0 F) |
| 2011 | 39.4 C (102.9 F) |
| 2012 | 40.6 C (105.1 F) |
| 2013 | 42.2 C (108.0 F) |
| 2014 | 41.1 C (106.0 F) |
| 2015 | 42.2 C (108.0 F) |
| 2016 | 40.6 C (105.1 F) |
| 2017 | 44.4 C (111.9 F) |
| 2018 | 40.6 C (105.1 F) |
| 2019 | 42.2 C (108.0 F) |
| 2020 | 45.0 C (113.0 F) |
| 2021 | 42.2 C (108.0 F) |
| 2022 | 46.1 C (115.0 F) |
| 2023 | 42.8 C (109.0 F) |
| 2024 | 43.9 C (111.0 F) |
| 2025 | 41.1 C (106.0 F) |
| 2026 | 41.1 C (106.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1948 | -4.4 C (24.1 F) |
| 1949 | -8.9 C (16.0 F) |
| 1950 | -6.1 C (21.0 F) |
| 1951 | -2.8 C (27.0 F) |
| 1952 | -3.3 C (26.1 F) |
| 1953 | -4.4 C (24.1 F) |
| 1954 | -2.8 C (27.0 F) |
| 1955 | -4.4 C (24.1 F) |
| 1956 | -5.6 C (21.9 F) |
| 1957 | -3.9 C (25.0 F) |
| 1958 | -3.3 C (26.1 F) |
| 1959 | -1.7 C (28.9 F) |
| 1960 | -5.6 C (21.9 F) |
| 1961 | -3.3 C (26.1 F) |
| 1962 | -5.0 C (23.0 F) |
| 1963 | -7.2 C (19.0 F) |
| 1964 | -4.4 C (24.1 F) |
| 1965 | -6.1 C (21.0 F) |
| 1966 | -3.3 C (26.1 F) |
| 1967 | -2.8 C (27.0 F) |
| 1968 | -5.6 C (21.9 F) |
| 1969 | -2.8 C (27.0 F) |
| 1970 | -3.9 C (25.0 F) |
| 1971 | -3.3 C (26.1 F) |
| 1972 | -5.0 C (23.0 F) |
| 1973 | -3.9 C (25.0 F) |
| 1974 | -5.0 C (23.0 F) |
| 1975 | -6.1 C (21.0 F) |
| 1976 | -6.1 C (21.0 F) |
| 1977 | -1.1 C (30.0 F) |
| 1978 | -5.6 C (21.9 F) |
| 1979 | -4.4 C (24.1 F) |
| 1980 | -3.9 C (25.0 F) |
| 1981 | 0.0 C (32.0 F) |
| 1982 | -3.9 C (25.0 F) |
| 1983 | -1.1 C (30.0 F) |
| 1984 | -2.2 C (28.0 F) |
| 1985 | -3.9 C (25.0 F) |
| 1986 | -1.7 C (28.9 F) |
| 1987 | -4.4 C (24.1 F) |
| 1988 | -2.8 C (27.0 F) |
| 1989 | -5.6 C (21.9 F) |
| 1990 | -8.3 C (17.1 F) |
| 1991 | -4.4 C (24.1 F) |
| 1992 | -2.2 C (28.0 F) |
| 1993 | -3.9 C (25.0 F) |
| 1994 | -2.2 C (28.0 F) |
| 1995 | 0.6 C (33.1 F) |
| 1996 | 0.0 C (32.0 F) |
| 1997 | -4.4 C (24.1 F) |
| 1998 | -6.7 C (19.9 F) |
| 1999 | -3.3 C (26.1 F) |
| 2000 | -2.8 C (27.0 F) |
| 2001 | -3.9 C (25.0 F) |
| 2002 | -3.9 C (25.0 F) |
| 2003 | -3.3 C (26.1 F) |
| 2004 | -3.3 C (26.1 F) |
| 2005 | -3.3 C (26.1 F) |
| 2006 | -2.2 C (28.0 F) |
| 2007 | -6.7 C (19.9 F) |
| 2008 | -2.2 C (28.0 F) |
| 2009 | -5.0 C (23.0 F) |
| 2010 | -2.8 C (27.0 F) |
| 2011 | -5.6 C (21.9 F) |
| 2012 | -5.6 C (21.9 F) |
| 2013 | -5.5 C (22.1 F) |
| 2014 | -2.7 C (27.1 F) |
| 2015 | -3.8 C (25.2 F) |
| 2016 | -2.7 C (27.1 F) |
| 2017 | -2.1 C (28.2 F) |
| 2018 | -2.1 C (28.2 F) |
| 2019 | -1.6 C (29.1 F) |
| 2020 | -1.6 C (29.1 F) |
| 2021 | -1.0 C (30.2 F) |
| 2022 | -2.7 C (27.1 F) |
| 2023 | -1.6 C (29.1 F) |
| 2024 | -0.5 C (31.1 F) |
| 2025 | -2.1 C (28.2 F) |
| 2026 | -0.6 C (30.9 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1948 | 19.8 mm (0.8 in) |
| 1949 | 23.4 mm (0.9 in) |
| 1950 | 55.4 mm (2.2 in) |
| 1951 | 39.1 mm (1.5 in) |
| 1952 | 25.4 mm (1.0 in) |
| 1953 | 28.4 mm (1.1 in) |
| 1954 | 47.0 mm (1.9 in) |
| 1955 | 60.5 mm (2.4 in) |
| 1956 | 18.0 mm (0.7 in) |
| 1957 | 27.4 mm (1.1 in) |
| 1958 | 31.0 mm (1.2 in) |
| 1959 | 67.1 mm (2.6 in) |
| 1960 | 32.3 mm (1.3 in) |
| 1961 | 25.4 mm (1.0 in) |
| 1962 | 35.8 mm (1.4 in) |
| 1963 | 71.6 mm (2.8 in) |
| 1964 | 29.7 mm (1.2 in) |
| 1965 | 36.1 mm (1.4 in) |
| 1966 | 33.0 mm (1.3 in) |
| 1967 | 76.5 mm (3.0 in) |
| 1968 | 68.6 mm (2.7 in) |
| 1969 | 37.6 mm (1.5 in) |
| 1970 | 50.0 mm (2.0 in) |
| 1971 | 20.8 mm (0.8 in) |
| 1972 | 30.2 mm (1.2 in) |
| 1973 | 32.0 mm (1.3 in) |
| 1974 | 34.5 mm (1.4 in) |
| 1975 | 20.8 mm (0.8 in) |
| 1976 | 11.4 mm (0.4 in) |
| 1977 | 13.2 mm (0.5 in) |
| 1978 | 39.1 mm (1.5 in) |
| 1979 | 35.8 mm (1.4 in) |
| 1980 | 17.3 mm (0.7 in) |
| 1981 | 33.3 mm (1.3 in) |
| 1982 | 51.1 mm (2.0 in) |
| 1983 | 43.2 mm (1.7 in) |
| 1984 | 20.8 mm (0.8 in) |
| 1985 | 31.8 mm (1.3 in) |
| 1986 | 41.1 mm (1.6 in) |
| 1987 | 35.3 mm (1.4 in) |
| 1988 | 17.5 mm (0.7 in) |
| 1989 | 33.3 mm (1.3 in) |
| 1990 | 42.2 mm (1.7 in) |
| 1991 | 36.6 mm (1.4 in) |
| 1992 | 30.2 mm (1.2 in) |
| 1993 | 28.7 mm (1.1 in) |
| 1994 | 25.4 mm (1.0 in) |
| 1995 | 38.9 mm (1.5 in) |
| 1996 | 48.8 mm (1.9 in) |
| 1997 | 26.4 mm (1.0 in) |
| 1998 | 37.1 mm (1.5 in) |
| 1999 | 18.3 mm (0.7 in) |
| 2000 | 28.7 mm (1.1 in) |
| 2001 | 32.3 mm (1.3 in) |
| 2002 | 38.1 mm (1.5 in) |
| 2003 | 17.5 mm (0.7 in) |
| 2004 | 32.8 mm (1.3 in) |
| 2005 | 27.7 mm (1.1 in) |
| 2006 | 37.1 mm (1.5 in) |
| 2007 | 21.8 mm (0.9 in) |
| 2008 | 30.5 mm (1.2 in) |
| 2009 | 37.1 mm (1.5 in) |
| 2010 | 26.2 mm (1.0 in) |
| 2011 | 18.8 mm (0.7 in) |
| 2012 | 35.3 mm (1.4 in) |
| 2013 | 21.8 mm (0.9 in) |
| 2014 | 48.8 mm (1.9 in) |
| 2015 | 26.4 mm (1.0 in) |
| 2016 | 29.5 mm (1.2 in) |
| 2017 | 33.8 mm (1.3 in) |
| 2018 | 35.3 mm (1.4 in) |
| 2019 | 29.5 mm (1.2 in) |
| 2020 | 21.1 mm (0.8 in) |
| 2021 | 65.8 mm (2.6 in) |
| 2022 | 72.4 mm (2.9 in) |
| 2023 | 31.2 mm (1.2 in) |
| 2024 | 27.2 mm (1.1 in) |
| 2025 | 42.2 mm (1.7 in) |
| 2026 | 46.0 mm (1.8 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1948 | 25.5 mm (1.0 in) |
| 1949 | 53.7 mm (2.1 in) |
| 1950 | 93.5 mm (3.7 in) |
| 1951 | 77.5 mm (3.1 in) |
| 1952 | 55.4 mm (2.2 in) |
| 1953 | 37.9 mm (1.5 in) |
| 1954 | 53.3 mm (2.1 in) |
| 1955 | 125.0 mm (4.9 in) |
| 1956 | 37.5 mm (1.5 in) |
| 1957 | 43.4 mm (1.7 in) |
| 1958 | 83.9 mm (3.3 in) |
| 1959 | 76.3 mm (3.0 in) |
| 1960 | 52.1 mm (2.1 in) |
| 1961 | 67.1 mm (2.6 in) |
| 1962 | 92.1 mm (3.6 in) |
| 1963 | 116.3 mm (4.6 in) |
| 1964 | 66.3 mm (2.6 in) |
| 1965 | 65.3 mm (2.6 in) |
| 1966 | 84.5 mm (3.3 in) |
| 1967 | 120.0 mm (4.7 in) |
| 1968 | 71.9 mm (2.8 in) |
| 1969 | 63.0 mm (2.5 in) |
| 1970 | 102.6 mm (4.0 in) |
| 1971 | 53.8 mm (2.1 in) |
| 1972 | 100.9 mm (4.0 in) |
| 1973 | 70.4 mm (2.8 in) |
| 1974 | 51.5 mm (2.0 in) |
| 1975 | 27.1 mm (1.1 in) |
| 1976 | 27.7 mm (1.1 in) |
| 1977 | 29.0 mm (1.1 in) |
| 1978 | 60.2 mm (2.4 in) |
| 1979 | 76.0 mm (3.0 in) |
| 1980 | 60.1 mm (2.4 in) |
| 1981 | 74.4 mm (2.9 in) |
| 1982 | 74.4 mm (2.9 in) |
| 1983 | 95.5 mm (3.8 in) |
| 1984 | 28.6 mm (1.1 in) |
| 1985 | 37.1 mm (1.5 in) |
| 1986 | 104.8 mm (4.1 in) |
| 1987 | 68.0 mm (2.7 in) |
| 1988 | 42.7 mm (1.7 in) |
| 1989 | 35.3 mm (1.4 in) |
| 1990 | 52.9 mm (2.1 in) |
| 1991 | 63.7 mm (2.5 in) |
| 1992 | 83.0 mm (3.3 in) |
| 1993 | 62.0 mm (2.4 in) |
| 1994 | 35.6 mm (1.4 in) |
| 1995 | 75.5 mm (3.0 in) |
| 1996 | 60.0 mm (2.4 in) |
| 1997 | 52.6 mm (2.1 in) |
| 1998 | 83.8 mm (3.3 in) |
| 1999 | 50.1 mm (2.0 in) |
| 2000 | 56.7 mm (2.2 in) |
| 2001 | 66.6 mm (2.6 in) |
| 2002 | 74.5 mm (2.9 in) |
| 2003 | 30.5 mm (1.2 in) |
| 2004 | 55.6 mm (2.2 in) |
| 2005 | 52.0 mm (2.0 in) |
| 2006 | 61.7 mm (2.4 in) |
| 2007 | 35.3 mm (1.4 in) |
| 2008 | 61.8 mm (2.4 in) |
| 2009 | 44.4 mm (1.7 in) |
| 2010 | 55.8 mm (2.2 in) |
| 2011 | 41.3 mm (1.6 in) |
| 2012 | 75.9 mm (3.0 in) |
| 2013 | 29.9 mm (1.2 in) |
| 2014 | 84.6 mm (3.3 in) |
| 2015 | 36.0 mm (1.4 in) |
| 2016 | 63.0 mm (2.5 in) |
| 2017 | 71.4 mm (2.8 in) |
| 2018 | 59.9 mm (2.4 in) |
| 2019 | 63.4 mm (2.5 in) |
| 2020 | 41.2 mm (1.6 in) |
| 2021 | 97.5 mm (3.8 in) |
| 2022 | 128.8 mm (5.1 in) |
| 2023 | 114.6 mm (4.5 in) |
| 2024 | 52.3 mm (2.1 in) |
| 2025 | 86.2 mm (3.4 in) |
| 2026 | 83.7 mm (3.3 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1948 | 35 days |
| 1949 | 173 days |
| 1950 | 137 days |
| 1951 | 88 days |
| 1952 | 188 days |
| 1953 | 133 days |
| 1954 | 152 days |
| 1955 | 189 days |
| 1956 | 133 days |
| 1957 | 111 days |
| 1958 | 111 days |
| 1959 | 142 days |
| 1960 | 109 days |
| 1961 | 71 days |
| 1962 | 136 days |
| 1963 | 93 days |
| 1964 | 82 days |
| 1965 | 112 days |
| 1966 | 98 days |
| 1967 | 123 days |
| 1968 | 151 days |
| 1969 | 136 days |
| 1970 | 132 days |
| 1971 | 123 days |
| 1972 | 86 days |
| 1973 | 140 days |
| 1974 | 109 days |
| 1975 | 124 days |
| 1976 | 96 days |
| 1977 | 123 days |
| 1978 | 127 days |
| 1979 | 83 days |
| 1980 | 114 days |
| 1981 | 136 days |
| 1982 | 77 days |
| 1983 | 139 days |
| 1984 | 117 days |
| 1985 | 50 days |
| 1986 | 135 days |
| 1987 | 174 days |
| 1988 | 155 days |
| 1989 | 100 days |
| 1990 | 155 days |
| 1991 | 71 days |
| 1992 | 112 days |
| 1993 | 120 days |
| 1994 | 132 days |
| 1995 | 171 days |
| 1996 | 124 days |
| 1997 | 127 days |
| 1998 | 138 days |
| 1999 | 141 days |
| 2000 | 108 days |
| 2001 | 90 days |
| 2002 | 169 days |
| 2003 | 110 days |
| 2004 | 141 days |
| 2005 | 95 days |
| 2006 | 131 days |
| 2007 | 141 days |
| 2008 | 222 days |
| 2009 | 99 days |
| 2010 | 142 days |
| 2011 | 97 days |
| 2012 | 139 days |
| 2013 | 88 days |
| 2014 | 152 days |
| 2015 | 112 days |
| 2016 | 148 days |
| 2017 | 141 days |
| 2018 | 130 days |
| 2019 | 112 days |
| 2020 | 182 days |
| 2021 | 179 days |
| 2022 | 105 days |
| 2023 | 168 days |
| 2024 | 111 days |
| 2025 | 151 days |
| 2026 | 107 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
70 years with a frostAcross 70 years with a frost, the median last spring frost at Stockton AP falls on 23 February and the median first autumn frost on 28 November, which leaves a median of 279 days between them.
In 1991 to 2024 the median growing season was 282 days. That is 8 days more than in 1949 to 1980.
Fitted over all years, the growing season changes by +2.7 days per decade at this station.
| Measure | Median, all years | Earliest period (1949 to 1980) | Recent period (1991 to 2024) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 23 February | 4 March | 17 February | 15 days earlier | -2.9 days per decade |
| First autumn frost | 28 November | 26 November | 27 November | 1 day later | -0.2 days per decade |
| Growing days | 279 days | 274 days | 282 days | 8 days more | +2.7 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
77 years, 1949 to 2025A day with at least 32.0 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 83.0 mm (3.3 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 32.0 mm (1.3 in) | |
| 5 years | 44.2 mm (1.7 in) | |
| 10 years | 52.9 mm (2.1 in) | |
| 25 years | 64.4 mm (2.5 in) | |
| 50 years | 73.5 mm (2.9 in) | |
| 100 years | 83.0 mm (3.3 in) | Longer than the 77 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, 77 years of values from 1949 to 2025.
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: 76.5 mm (3.0 in) in 1967; 72.4 mm (2.9 in) in 2022; 71.6 mm (2.8 in) in 1963.
Station Changes
2 suspected2 changes were suspected in the annual mean temperature of Stockton AP, at 1997 and 2017. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1997 ran 0.5 C (0.8 F) lower than in the years before (possible change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 2017 ran 0.6 C (1.0 F) higher than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1997 | -0.5 | -0.8 | possible | 5 |
| 2017 | +0.6 | +1.0 | 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
2011 to 2025 against 1961 to 1990Over 2011 to 2025, Stockton AP had a mean temperature of 17.3 C (63.1 F) and 328.1 mm (12.9 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Lemon Cove (United States, 257 km away), Los Banos Det Resv (United States, 103 km away) and Sasabe (United States, 1,135 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Lemon Cove | United States | 257 km (160 mi) | 17.1 C (62.8 F) | 352.8 mm (13.9 in) | 0.75 |
| Los Banos Det Resv | United States | 103 km (64 mi) | 17.0 C (62.6 F) | 209.7 mm (8.3 in) | 0.82 |
| Sasabe | United States | 1,135 km (705 mi) | 17.8 C (64.0 F) | 453.5 mm (17.9 in) | 0.86 |
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 (2026-10-14).