Modesto AP Weather Records (USW00023258)
Record envelope, standing records and threshold days for Modesto AP (USW00023258), California, United States, with 121 years of record.
Key Facts for Modesto AP
- Modesto AP (USW00023258) is a weather station in California, United States at 37.63 latitude and -120.95 longitude, 27 m (87 ft) above sea level.
- The station reports from 1906 to 2026, 121 years of record.
- 1,464 records set at Modesto AP still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Modesto AP tied a daily record high maximum temperature of 36.7 C (98.1 F) on 8 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, 37.63 latitude, -120.95 longitude.
- Elevation: 27 m (87 ft).
- Period of record: 1906 to 2026, 121 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 | 23.9 C (75.0 F) | -7.8 C (18.0 F) | 17.8 C (64.0 F) | 0.0 C (32.0 F) |
| Feb | 26.7 C (80.1 F) | -4.4 C (24.1 F) | 26.7 C (80.1 F) | 0.6 C (33.1 F) |
| Mar | 32.8 C (91.0 F) | -2.8 C (27.0 F) | 32.8 C (91.0 F) | 3.3 C (37.9 F) |
| Apr | 37.8 C (100.0 F) | -1.1 C (30.0 F) | 30.0 C (86.0 F) | 6.1 C (43.0 F) |
| May | 41.7 C (107.1 F) | 0.0 C (32.0 F) | 35.0 C (95.0 F) | 10.6 C (51.1 F) |
| Jun | 44.4 C (111.9 F) | 3.9 C (39.0 F) | 38.9 C (102.0 F) | 11.1 C (52.0 F) |
| Jul | 45.0 C (113.0 F) | 7.8 C (46.0 F) | 40.0 C (104.0 F) | 13.9 C (57.0 F) |
| Aug | 43.9 C (111.0 F) | 7.8 C (46.0 F) | 40.0 C (104.0 F) | 15.0 C (59.0 F) |
| Sep | 44.4 C (111.9 F) | 4.4 C (39.9 F) | 40.6 C (105.1 F) | 11.1 C (52.0 F) |
| Oct | 40.0 C (104.0 F) | -1.7 C (28.9 F) | 38.3 C (100.9 F) | 10.6 C (51.1 F) |
| Nov | 31.1 C (88.0 F) | -3.9 C (25.0 F) | n/a | n/a |
| Dec | 23.9 C (75.0 F) | -7.8 C (18.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1927 | 17 |
| 1928 | 27 |
| 1929 | 45 |
| 1930 | 34 |
| 1931 | 11 |
| 1932 | 23 |
| 1933 | 16 |
| 1934 | 11 |
| 1935 | 26 |
| 1936 | 13 |
| 1937 | 23 |
| 1938 | 14 |
| 1939 | 25 |
| 1940 | 10 |
| 1941 | 8 |
| 1942 | 8 |
| 1943 | 13 |
| 1944 | 16 |
| 1945 | 11 |
| 1946 | 10 |
| 1947 | 12 |
| 1948 | 20 |
| 1949 | 51 |
| 1950 | 27 |
| 1951 | 7 |
| 1952 | 9 |
| 1953 | 11 |
| 1954 | 21 |
| 1955 | 14 |
| 1956 | 8 |
| 1957 | 8 |
| 1958 | 14 |
| 1959 | 18 |
| 1960 | 17 |
| 1961 | 20 |
| 1962 | 10 |
| 1963 | 23 |
| 1964 | 23 |
| 1965 | 17 |
| 1966 | 13 |
| 1967 | 12 |
| 1968 | 7 |
| 1969 | 7 |
| 1970 | 10 |
| 1971 | 9 |
| 1972 | 19 |
| 1973 | 12 |
| 1974 | 10 |
| 1975 | 5 |
| 1976 | 14 |
| 1977 | 11 |
| 1978 | 14 |
| 1979 | 9 |
| 1980 | 10 |
| 1981 | 11 |
| 1982 | 18 |
| 1983 | 9 |
| 1984 | 9 |
| 1985 | 15 |
| 1986 | 9 |
| 1987 | 11 |
| 1988 | 15 |
| 1989 | 20 |
| 1990 | 15 |
| 1991 | 21 |
| 1992 | 15 |
| 1993 | 11 |
| 1994 | 6 |
| 1995 | 20 |
| 1996 | 35 |
| 1997 | 26 |
| 1998 | 16 |
| 1999 | 2 |
| 2000 | 9 |
| 2001 | 11 |
| 2002 | 4 |
| 2003 | 10 |
| 2004 | 7 |
| 2005 | 3 |
| 2006 | 14 |
| 2007 | 14 |
| 2008 | 17 |
| 2009 | 14 |
| 2010 | 4 |
| 2011 | 6 |
| 2012 | 9 |
| 2013 | 7 |
| 2014 | 13 |
| 2015 | 26 |
| 2016 | 14 |
| 2017 | 36 |
| 2018 | 8 |
| 2019 | 9 |
| 2020 | 24 |
| 2021 | 6 |
| 2022 | 13 |
| 2023 | 9 |
| 2024 | 19 |
| 2025 | 9 |
| 2026 | 12 |
All-Time Record Progression
9 new records| Date | Kind | Detail |
|---|---|---|
| 1958-04-02 | Record daily precipitation | Record daily precipitation 51.1 mm (2.0 in) |
| 1961-06-15 | Record high maximum temperature | Record high maximum temperature 44.4 C (111.9 F) |
| 1970-11-28 | Record daily precipitation | Record daily precipitation 57.2 mm (2.3 in) |
| 1974-07-25 | Record high minimum temperature | Record high minimum temperature 25.6 C (78.1 F) |
| 1978-03-04 | Record daily precipitation | Record daily precipitation 69.1 mm (2.7 in) |
| 1990-07-12 | Record high minimum temperature | Record high minimum temperature 26.1 C (79.0 F) |
| 1990-07-13 | Record high minimum temperature | Record high minimum temperature 26.7 C (80.1 F) |
| 2006-07-22 | Record high minimum temperature | Record high minimum temperature 28.9 C (84.0 F) |
| 2006-07-23 | Record high maximum temperature | Record high maximum temperature 45.0 C (113.0 F) |
Wettest Day of Each Month
Mar: 69.1 mm (2.7 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 63.2 mm (2.5 in) | 27 January 2021 |
| Feb | 48.5 mm (1.9 in) | 3 February 1998 |
| Mar | 69.1 mm (2.7 in) | 4 March 1978 |
| Apr | 51.1 mm (2.0 in) | 2 April 1958 |
| May | 42.4 mm (1.7 in) | 12 May 1998 |
| Jun | 29.0 mm (1.1 in) | 8 June 2000 |
| Jul | 16.5 mm (0.6 in) | 9 July 1974 |
| Aug | 15.0 mm (0.6 in) | 18 August 1975 |
| Sep | 47.2 mm (1.9 in) | 18 September 1959 |
| Oct | 44.5 mm (1.8 in) | 7 October 1973 |
| Nov | 57.2 mm (2.3 in) | 28 November 1970 |
| Dec | 55.4 mm (2.2 in) | 11 December 2014 |
Period of Record Coverage
1927 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1927 | 238 | 65% | No |
| 1928 | 350 | 96% | Yes |
| 1929 | 364 | 100% | Yes |
| 1930 | 365 | 100% | Yes |
| 1931 | 365 | 100% | Yes |
| 1932 | 366 | 100% | Yes |
| 1933 | 365 | 100% | Yes |
| 1934 | 365 | 100% | Yes |
| 1935 | 365 | 100% | Yes |
| 1936 | 366 | 100% | Yes |
| 1937 | 365 | 100% | Yes |
| 1938 | 365 | 100% | Yes |
| 1939 | 364 | 100% | Yes |
| 1940 | 366 | 100% | Yes |
| 1941 | 365 | 100% | Yes |
| 1942 | 365 | 100% | Yes |
| 1943 | 365 | 100% | Yes |
| 1944 | 366 | 100% | Yes |
| 1945 | 365 | 100% | Yes |
| 1946 | 364 | 100% | Yes |
| 1947 | 365 | 100% | Yes |
| 1948 | 365 | 100% | Yes |
| 1949 | 356 | 98% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 348 | 95% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 364 | 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 | 365 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 363 | 99% | 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 | 365 | 100% | Yes |
| 1981 | 364 | 100% | Yes |
| 1982 | 364 | 100% | Yes |
| 1983 | 365 | 100% | Yes |
| 1984 | 365 | 100% | Yes |
| 1985 | 365 | 100% | Yes |
| 1986 | 333 | 91% | Yes |
| 1987 | 365 | 100% | Yes |
| 1988 | 336 | 92% | Yes |
| 1989 | 364 | 100% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 362 | 99% | Yes |
| 1992 | 360 | 98% | Yes |
| 1993 | 360 | 99% | Yes |
| 1994 | 364 | 100% | Yes |
| 1995 | 333 | 91% | Yes |
| 1996 | 364 | 99% | Yes |
| 1997 | 362 | 99% | Yes |
| 1998 | 365 | 100% | Yes |
| 1999 | 364 | 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 | 365 | 100% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 364 | 100% | Yes |
| 2015 | 365 | 100% | Yes |
| 2016 | 366 | 100% | Yes |
| 2017 | 365 | 100% | Yes |
| 2018 | 365 | 100% | Yes |
| 2019 | 365 | 100% | Yes |
| 2020 | 363 | 99% | Yes |
| 2021 | 365 | 100% | Yes |
| 2022 | 364 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 365 | 100% | Yes |
| 2025 | 361 | 99% | Yes |
| 2026 | 284 | 78% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 8 October 2026 | Modesto AP, US | daily high max (Tie, Provisional) | 36.7 C (98.1 F) | tie | 1 year | 2 of 100 (Routine) |
| 7 October 2026 | Modesto AP, US | daily high min (Provisional) | 17.8 C (64.0 F) | 0.6 C (1.1 F) | 29 years | 19 of 100 (Routine) |
| 7 October 2026 | Modesto AP, US | daily high max (Provisional) | 38.3 C (100.9 F) | 1.1 C (2.0 F) | 1 year | 12 of 100 (Routine) |
| 6 October 2026 | Modesto AP, US | daily high max (Tie, Provisional) | 37.2 C (99.0 F) | tie | 1 year | 2 of 100 (Routine) |
| 5 October 2026 | Modesto AP, US | daily high max (Provisional) | 37.2 C (99.0 F) | 0.5 C (0.9 F) | 79 years | 34 of 100 (Routine) |
| 5 October 2026 | Modesto AP, US | daily high min (Tie, Provisional) | 20.0 C (68.0 F) | tie | 1 year | 2 of 100 (Routine) |
| 10 September 2026 | Modesto AP, US | daily high min (Tie, Provisional) | 22.2 C (72.0 F) | tie | 4 years | 2 of 100 (Routine) |
| 28 August 2026 | Modesto AP, US | daily rain (Provisional) | 0.3 mm (0.01 in) | 0.3 mm (0.01 in) | 120 years | 20 of 100 (Routine) |
| 29 March 2026 | Modesto AP, US | daily high max | 31.1 C (88.0 F) | 1.7 C (3.1 F) | 57 years | 31 of 100 (Routine) |
| 24 March 2026 | Modesto AP, US | daily high max | 30.0 C (86.0 F) | 1.1 C (2.0 F) | 4 years | 13 of 100 (Routine) |
| 23 March 2026 | Modesto AP, US | daily high max | 30.6 C (87.1 F) | 1.2 C (2.2 F) | 4 years | 13 of 100 (Routine) |
| 22 March 2026 | Modesto AP, US | daily high max | 28.9 C (84.0 F) | 0.6 C (1.1 F) | 28 years | 19 of 100 (Routine) |
| 21 March 2026 | Modesto AP, US | daily high max | 28.3 C (82.9 F) | 1.1 C (2.0 F) | 65 years | 31 of 100 (Routine) |
| 21 March 2026 | Modesto AP, US | monthly high min (Tie) | 15.0 C (59.0 F) | tie | 37 years | 7 of 100 (Routine) |
| 20 March 2026 | Modesto AP, US | monthly high max (Tie) | 32.8 C (91.0 F) | tie | 0 years | 5 of 100 (Routine) |
| 19 March 2026 | Modesto AP, US | daily high max | 31.1 C (88.0 F) | 0.5 C (0.9 F) | 65 years | 30 of 100 (Routine) |
| 19 March 2026 | Modesto AP, US | monthly high min (Tie) | 15.0 C (59.0 F) | tie | 37 years | 7 of 100 (Routine) |
| 18 March 2026 | Modesto AP, US | monthly high max | 32.8 C (91.0 F) | 1.1 C (2.0 F) | 65 years | 41 of 100 (Notable) |
| 18 March 2026 | Modesto AP, US | daily high min (Tie) | 12.8 C (55.0 F) | tie | 29 years | 4 of 100 (Routine) |
| 17 March 2026 | Modesto AP, US | daily high max | 31.1 C (88.0 F) | 0.5 C (0.9 F) | 53 years | 27 of 100 (Routine) |
Climate Trend
93 complete years, 1929 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1929 | 15.1 C | -1.53 C |
| 1930 | 15.1 C | -1.53 C |
| 1931 | 16.2 C | -0.41 C |
| 1932 | 15.4 C | -1.15 C |
| 1933 | 15.3 C | -1.32 C |
| 1934 | 16.5 C | -0.09 C |
| 1935 | 15.4 C | -1.23 C |
| 1936 | 16.2 C | -0.35 C |
| 1937 | 15.9 C | -0.72 C |
| 1938 | 15.8 C | -0.84 C |
| 1939 | 16.4 C | -0.24 C |
| 1940 | 16.7 C | +0.15 C |
| 1941 | 16.3 C | -0.31 C |
| 1942 | 15.5 C | -1.14 C |
| 1943 | 15.7 C | -0.91 C |
| 1944 | 15.5 C | -1.14 C |
| 1945 | 15.6 C | -0.95 C |
| 1946 | 15.3 C | -1.32 C |
| 1947 | 15.7 C | -0.90 C |
| 1948 | 14.4 C | -2.23 C |
| 1949 | 14.2 C | -2.39 C |
| 1950 | 16.3 C | -0.25 C |
| 1951 | 16.0 C | -0.61 C |
| 1953 | 15.9 C | -0.72 C |
| 1954 | 15.7 C | -0.90 C |
| 1955 | 15.3 C | -1.28 C |
| 1956 | 15.7 C | -0.90 C |
| 1957 | 16.1 C | -0.53 C |
| 1958 | 17.2 C | +0.64 C |
| 1959 | 17.2 C | +0.63 C |
| 1960 | 16.5 C | -0.13 C |
| 1961 | 16.1 C | -0.47 C |
| 1962 | 15.7 C | -0.85 C |
| 1963 | 15.7 C | -0.94 C |
| 1964 | 15.7 C | -0.92 C |
| 1965 | 15.4 C | -1.22 C |
| 1966 | 16.0 C | -0.55 C |
| 1967 | 16.0 C | -0.63 C |
| 1968 | 16.3 C | -0.32 C |
| 1969 | 16.4 C | -0.22 C |
| 1970 | 16.7 C | +0.11 C |
| 1971 | 15.6 C | -0.98 C |
| 1972 | 16.1 C | -0.47 C |
| 1973 | 16.5 C | -0.08 C |
| 1974 | 16.6 C | +0.01 C |
| 1975 | 15.6 C | -0.95 C |
| 1976 | 16.3 C | -0.31 C |
| 1977 | 16.8 C | +0.18 C |
| 1978 | 17.0 C | +0.43 C |
| 1979 | 17.3 C | +0.67 C |
| 1980 | 16.5 C | -0.10 C |
| 1981 | 17.4 C | +0.85 C |
| 1982 | 16.0 C | -0.57 C |
| 1983 | 16.9 C | +0.34 C |
| 1984 | 17.3 C | +0.69 C |
| 1985 | 16.3 C | -0.31 C |
| 1987 | 16.8 C | +0.23 C |
| 1989 | 16.7 C | +0.09 C |
| 1990 | 17.2 C | +0.59 C |
| 1991 | 17.2 C | +0.58 C |
| 1992 | 18.0 C | +1.40 C |
| 1993 | 17.3 C | +0.70 C |
| 1994 | 17.0 C | +0.40 C |
| 1996 | 18.3 C | +1.69 C |
| 1997 | 18.3 C | +1.72 C |
| 1998 | 16.7 C | +0.06 C |
| 1999 | 16.1 C | -0.52 C |
| 2000 | 16.7 C | +0.08 C |
| 2001 | 17.3 C | +0.70 C |
| 2002 | 16.8 C | +0.20 C |
| 2003 | 17.3 C | +0.67 C |
| 2004 | 17.0 C | +0.43 C |
| 2005 | 17.2 C | +0.62 C |
| 2006 | 17.6 C | +0.99 C |
| 2007 | 17.9 C | +1.30 C |
| 2008 | 18.0 C | +1.43 C |
| 2009 | 17.6 C | +0.98 C |
| 2010 | 16.6 C | +0.04 C |
| 2011 | 16.3 C | -0.31 C |
| 2012 | 17.3 C | +0.69 C |
| 2013 | 17.3 C | +0.74 C |
| 2014 | 18.5 C | +1.91 C |
| 2015 | 18.5 C | +1.94 C |
| 2016 | 18.7 C | +2.09 C |
| 2017 | 18.5 C | +1.94 C |
| 2018 | 17.7 C | +1.15 C |
| 2019 | 17.6 C | +0.96 C |
| 2020 | 18.1 C | +1.48 C |
| 2021 | 17.2 C | +0.58 C |
| 2022 | 17.4 C | +0.80 C |
| 2023 | 16.6 C | +0.01 C |
| 2024 | 18.3 C | +1.67 C |
| 2025 | 17.6 C | +0.99 C |
The annual mean temperature here has risen by 0.3 C (0.2 to 0.3) per decade over 1929 to 2025. In Fahrenheit: 0.5 F (0.4 to 0.6) per decade. The slope is a straight line fitted to 93 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.3 C (0.2 to 0.3) per decade | 0.5 F (0.4 to 0.6) per decade | 1929 to 2025 | 93 | Rise |
| Mean daily maximum | 0.2 C (0.1 to 0.2) per decade | 0.3 F (0.2 to 0.4) per decade | 1929 to 2025 | 93 | Rise |
| Mean daily minimum | 0.4 C (0.3 to 0.4) per decade | 0.6 F (0.5 to 0.7) per decade | 1929 to 2025 | 93 | 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
1906 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 45.0 C (113.0 F) | 2006 | 41.1 C (106.0 F) | 100 |
| Coldest night (TNn) | -7.8 C (18.0 F) | 1932 | -3.3 C (26.1 F) | 100 |
| Wettest day (Rx1day) | 69.1 mm (2.7 in) | 1978 | 28.2 mm (1.1 in) | 113 |
| Wettest five days (Rx5day) | 119.0 mm (4.7 in) | 1958 | 55.0 mm (2.2 in) | 111 |
| Longest dry spell (CDD) | 215 days | 2021 | 126 days | 113 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1906 | n/a |
| 1907 | n/a |
| 1908 | n/a |
| 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 |
| 1927 | 39.4 C (102.9 F) |
| 1928 | 40.0 C (104.0 F) |
| 1929 | 42.2 C (108.0 F) |
| 1930 | 40.0 C (104.0 F) |
| 1931 | 43.3 C (109.9 F) |
| 1932 | 39.4 C (102.9 F) |
| 1933 | 41.7 C (107.1 F) |
| 1934 | 40.0 C (104.0 F) |
| 1935 | 42.2 C (108.0 F) |
| 1936 | 40.0 C (104.0 F) |
| 1937 | 41.7 C (107.1 F) |
| 1938 | 42.2 C (108.0 F) |
| 1939 | 41.1 C (106.0 F) |
| 1940 | 41.7 C (107.1 F) |
| 1941 | 40.6 C (105.1 F) |
| 1942 | 41.1 C (106.0 F) |
| 1943 | 39.4 C (102.9 F) |
| 1944 | 40.6 C (105.1 F) |
| 1945 | 40.0 C (104.0 F) |
| 1946 | 40.6 C (105.1 F) |
| 1947 | 38.9 C (102.0 F) |
| 1948 | 40.6 C (105.1 F) |
| 1949 | 38.9 C (102.0 F) |
| 1950 | 42.2 C (108.0 F) |
| 1951 | 41.1 C (106.0 F) |
| 1952 | 39.4 C (102.9 F) |
| 1953 | 39.4 C (102.9 F) |
| 1954 | 42.2 C (108.0 F) |
| 1955 | 41.1 C (106.0 F) |
| 1956 | 42.2 C (108.0 F) |
| 1957 | 42.2 C (108.0 F) |
| 1958 | 39.4 C (102.9 F) |
| 1959 | 42.2 C (108.0 F) |
| 1960 | 42.8 C (109.0 F) |
| 1961 | 44.4 C (111.9 F) |
| 1962 | 40.6 C (105.1 F) |
| 1963 | 40.0 C (104.0 F) |
| 1964 | 42.8 C (109.0 F) |
| 1965 | 38.9 C (102.0 F) |
| 1966 | 41.7 C (107.1 F) |
| 1967 | 40.6 C (105.1 F) |
| 1968 | 40.6 C (105.1 F) |
| 1969 | 39.4 C (102.9 F) |
| 1970 | 41.1 C (106.0 F) |
| 1971 | 41.1 C (106.0 F) |
| 1972 | 43.9 C (111.0 F) |
| 1973 | 42.8 C (109.0 F) |
| 1974 | 40.6 C (105.1 F) |
| 1975 | 42.2 C (108.0 F) |
| 1976 | 41.7 C (107.1 F) |
| 1977 | 41.1 C (106.0 F) |
| 1978 | 41.1 C (106.0 F) |
| 1979 | 40.6 C (105.1 F) |
| 1980 | 40.6 C (105.1 F) |
| 1981 | 41.1 C (106.0 F) |
| 1982 | 38.9 C (102.0 F) |
| 1983 | 41.7 C (107.1 F) |
| 1984 | 41.1 C (106.0 F) |
| 1985 | 41.7 C (107.1 F) |
| 1986 | 40.6 C (105.1 F) |
| 1987 | 40.6 C (105.1 F) |
| 1988 | 42.2 C (108.0 F) |
| 1989 | 41.7 C (107.1 F) |
| 1990 | 41.1 C (106.0 F) |
| 1991 | 42.2 C (108.0 F) |
| 1992 | 40.0 C (104.0 F) |
| 1993 | 41.1 C (106.0 F) |
| 1994 | 39.4 C (102.9 F) |
| 1995 | 40.6 C (105.1 F) |
| 1996 | 41.7 C (107.1 F) |
| 1997 | 40.6 C (105.1 F) |
| 1998 | 42.2 C (108.0 F) |
| 1999 | 41.7 C (107.1 F) |
| 2000 | 41.1 C (106.0 F) |
| 2001 | 42.8 C (109.0 F) |
| 2002 | 43.3 C (109.9 F) |
| 2003 | 41.7 C (107.1 F) |
| 2004 | 38.9 C (102.0 F) |
| 2005 | 41.7 C (107.1 F) |
| 2006 | 45.0 C (113.0 F) |
| 2007 | 43.3 C (109.9 F) |
| 2008 | 42.8 C (109.0 F) |
| 2009 | 43.9 C (111.0 F) |
| 2010 | 41.7 C (107.1 F) |
| 2011 | 40.0 C (104.0 F) |
| 2012 | 40.6 C (105.1 F) |
| 2013 | 42.2 C (108.0 F) |
| 2014 | 41.1 C (106.0 F) |
| 2015 | 41.1 C (106.0 F) |
| 2016 | 41.7 C (107.1 F) |
| 2017 | 42.8 C (109.0 F) |
| 2018 | 40.6 C (105.1 F) |
| 2019 | 41.1 C (106.0 F) |
| 2020 | 43.9 C (111.0 F) |
| 2021 | 42.2 C (108.0 F) |
| 2022 | 44.4 C (111.9 F) |
| 2023 | 41.1 C (106.0 F) |
| 2024 | 43.3 C (109.9 F) |
| 2025 | 39.4 C (102.9 F) |
| 2026 | 40.6 C (105.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1906 | n/a |
| 1907 | n/a |
| 1908 | n/a |
| 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 |
| 1927 | -4.4 C (24.1 F) |
| 1928 | -4.4 C (24.1 F) |
| 1929 | -4.4 C (24.1 F) |
| 1930 | -7.2 C (19.0 F) |
| 1931 | -3.3 C (26.1 F) |
| 1932 | -7.8 C (18.0 F) |
| 1933 | -3.9 C (25.0 F) |
| 1934 | -1.1 C (30.0 F) |
| 1935 | -3.9 C (25.0 F) |
| 1936 | -3.9 C (25.0 F) |
| 1937 | -6.7 C (19.9 F) |
| 1938 | -2.8 C (27.0 F) |
| 1939 | -2.2 C (28.0 F) |
| 1940 | -5.6 C (21.9 F) |
| 1941 | -1.7 C (28.9 F) |
| 1942 | -3.3 C (26.1 F) |
| 1943 | -3.3 C (26.1 F) |
| 1944 | -2.2 C (28.0 F) |
| 1945 | -2.8 C (27.0 F) |
| 1946 | -3.3 C (26.1 F) |
| 1947 | -3.9 C (25.0 F) |
| 1948 | -4.4 C (24.1 F) |
| 1949 | -7.8 C (18.0 F) |
| 1950 | -6.7 C (19.9 F) |
| 1951 | -2.8 C (27.0 F) |
| 1952 | -3.9 C (25.0 F) |
| 1953 | -2.2 C (28.0 F) |
| 1954 | -3.9 C (25.0 F) |
| 1955 | -2.8 C (27.0 F) |
| 1956 | -3.3 C (26.1 F) |
| 1957 | -3.9 C (25.0 F) |
| 1958 | -3.3 C (26.1 F) |
| 1959 | -2.8 C (27.0 F) |
| 1960 | -5.6 C (21.9 F) |
| 1961 | -3.9 C (25.0 F) |
| 1962 | -4.4 C (24.1 F) |
| 1963 | -5.6 C (21.9 F) |
| 1964 | -3.3 C (26.1 F) |
| 1965 | -5.0 C (23.0 F) |
| 1966 | -3.3 C (26.1 F) |
| 1967 | -3.9 C (25.0 F) |
| 1968 | -3.9 C (25.0 F) |
| 1969 | -2.2 C (28.0 F) |
| 1970 | -3.9 C (25.0 F) |
| 1971 | -3.9 C (25.0 F) |
| 1972 | -5.6 C (21.9 F) |
| 1973 | -3.9 C (25.0 F) |
| 1974 | -3.3 C (26.1 F) |
| 1975 | -3.3 C (26.1 F) |
| 1976 | -3.9 C (25.0 F) |
| 1977 | -2.2 C (28.0 F) |
| 1978 | -3.9 C (25.0 F) |
| 1979 | -3.3 C (26.1 F) |
| 1980 | -2.8 C (27.0 F) |
| 1981 | 0.6 C (33.1 F) |
| 1982 | -2.8 C (27.0 F) |
| 1983 | -0.6 C (30.9 F) |
| 1984 | -0.6 C (30.9 F) |
| 1985 | -3.9 C (25.0 F) |
| 1986 | -1.1 C (30.0 F) |
| 1987 | -3.9 C (25.0 F) |
| 1988 | -2.8 C (27.0 F) |
| 1989 | -4.4 C (24.1 F) |
| 1990 | -7.2 C (19.0 F) |
| 1991 | -0.6 C (30.9 F) |
| 1992 | -0.6 C (30.9 F) |
| 1993 | -2.8 C (27.0 F) |
| 1994 | -0.6 C (30.9 F) |
| 1995 | 1.7 C (35.1 F) |
| 1996 | 0.6 C (33.1 F) |
| 1997 | -2.2 C (28.0 F) |
| 1998 | -6.1 C (21.0 F) |
| 1999 | -3.3 C (26.1 F) |
| 2000 | -3.3 C (26.1 F) |
| 2001 | -2.8 C (27.0 F) |
| 2002 | -3.3 C (26.1 F) |
| 2003 | -2.8 C (27.0 F) |
| 2004 | -2.2 C (28.0 F) |
| 2005 | -1.1 C (30.0 F) |
| 2006 | -1.7 C (28.9 F) |
| 2007 | -5.0 C (23.0 F) |
| 2008 | -1.7 C (28.9 F) |
| 2009 | -4.4 C (24.1 F) |
| 2010 | -2.2 C (28.0 F) |
| 2011 | -3.9 C (25.0 F) |
| 2012 | -5.0 C (23.0 F) |
| 2013 | -4.3 C (24.3 F) |
| 2014 | -1.0 C (30.2 F) |
| 2015 | -2.7 C (27.1 F) |
| 2016 | -1.0 C (30.2 F) |
| 2017 | -1.0 C (30.2 F) |
| 2018 | -2.7 C (27.1 F) |
| 2019 | -1.6 C (29.1 F) |
| 2020 | -2.1 C (28.2 F) |
| 2021 | -2.7 C (27.1 F) |
| 2022 | -2.1 C (28.2 F) |
| 2023 | -2.7 C (27.1 F) |
| 2024 | -0.5 C (31.1 F) |
| 2025 | -1.0 C (30.2 F) |
| 2026 | 0.0 C (32.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1906 | 31.8 mm (1.3 in) |
| 1907 | 36.8 mm (1.4 in) |
| 1908 | 25.4 mm (1.0 in) |
| 1909 | 22.9 mm (0.9 in) |
| 1910 | 22.9 mm (0.9 in) |
| 1911 | 26.7 mm (1.1 in) |
| 1912 | 19.1 mm (0.8 in) |
| 1913 | 25.4 mm (1.0 in) |
| 1914 | 31.8 mm (1.3 in) |
| 1915 | 50.8 mm (2.0 in) |
| 1916 | 43.2 mm (1.7 in) |
| 1917 | 22.4 mm (0.9 in) |
| 1918 | 26.7 mm (1.1 in) |
| 1927 | 37.3 mm (1.5 in) |
| 1928 | 39.9 mm (1.6 in) |
| 1929 | 17.3 mm (0.7 in) |
| 1930 | 16.3 mm (0.6 in) |
| 1931 | 27.2 mm (1.1 in) |
| 1932 | 31.0 mm (1.2 in) |
| 1933 | 40.9 mm (1.6 in) |
| 1934 | 27.9 mm (1.1 in) |
| 1935 | 45.7 mm (1.8 in) |
| 1936 | 26.9 mm (1.1 in) |
| 1937 | 37.6 mm (1.5 in) |
| 1938 | 21.8 mm (0.9 in) |
| 1939 | 21.3 mm (0.8 in) |
| 1940 | 29.2 mm (1.1 in) |
| 1941 | 31.0 mm (1.2 in) |
| 1942 | 23.1 mm (0.9 in) |
| 1943 | 28.7 mm (1.1 in) |
| 1944 | 31.2 mm (1.2 in) |
| 1945 | 42.9 mm (1.7 in) |
| 1946 | 20.3 mm (0.8 in) |
| 1947 | 26.4 mm (1.0 in) |
| 1948 | 27.4 mm (1.1 in) |
| 1949 | 17.5 mm (0.7 in) |
| 1950 | 27.9 mm (1.1 in) |
| 1951 | 26.7 mm (1.1 in) |
| 1952 | 24.6 mm (1.0 in) |
| 1953 | 25.4 mm (1.0 in) |
| 1954 | 31.0 mm (1.2 in) |
| 1955 | 50.8 mm (2.0 in) |
| 1956 | 22.9 mm (0.9 in) |
| 1957 | 23.6 mm (0.9 in) |
| 1958 | 51.1 mm (2.0 in) |
| 1959 | 47.2 mm (1.9 in) |
| 1960 | 17.5 mm (0.7 in) |
| 1961 | 28.2 mm (1.1 in) |
| 1962 | 27.7 mm (1.1 in) |
| 1963 | 29.5 mm (1.2 in) |
| 1964 | 30.2 mm (1.2 in) |
| 1965 | 23.6 mm (0.9 in) |
| 1966 | 21.6 mm (0.9 in) |
| 1967 | 44.2 mm (1.7 in) |
| 1968 | 32.8 mm (1.3 in) |
| 1969 | 33.5 mm (1.3 in) |
| 1970 | 57.2 mm (2.3 in) |
| 1971 | 23.4 mm (0.9 in) |
| 1972 | 30.7 mm (1.2 in) |
| 1973 | 44.5 mm (1.8 in) |
| 1974 | 33.0 mm (1.3 in) |
| 1975 | 19.1 mm (0.8 in) |
| 1976 | 15.7 mm (0.6 in) |
| 1977 | 19.1 mm (0.8 in) |
| 1978 | 69.1 mm (2.7 in) |
| 1979 | 21.6 mm (0.9 in) |
| 1980 | 34.8 mm (1.4 in) |
| 1981 | 29.5 mm (1.2 in) |
| 1982 | 41.7 mm (1.6 in) |
| 1983 | 40.6 mm (1.6 in) |
| 1984 | 28.7 mm (1.1 in) |
| 1985 | 25.9 mm (1.0 in) |
| 1986 | 32.5 mm (1.3 in) |
| 1987 | 39.6 mm (1.6 in) |
| 1988 | 27.7 mm (1.1 in) |
| 1989 | 19.1 mm (0.8 in) |
| 1990 | 19.6 mm (0.8 in) |
| 1991 | 23.4 mm (0.9 in) |
| 1992 | 28.7 mm (1.1 in) |
| 1993 | 32.8 mm (1.3 in) |
| 1994 | 23.1 mm (0.9 in) |
| 1995 | 55.6 mm (2.2 in) |
| 1996 | 46.0 mm (1.8 in) |
| 1997 | 28.4 mm (1.1 in) |
| 1998 | 48.5 mm (1.9 in) |
| 1999 | 22.1 mm (0.9 in) |
| 2000 | 41.4 mm (1.6 in) |
| 2001 | 25.1 mm (1.0 in) |
| 2002 | 36.3 mm (1.4 in) |
| 2003 | 20.8 mm (0.8 in) |
| 2004 | 20.8 mm (0.8 in) |
| 2005 | 27.9 mm (1.1 in) |
| 2006 | 43.2 mm (1.7 in) |
| 2007 | 14.0 mm (0.6 in) |
| 2008 | 30.7 mm (1.2 in) |
| 2009 | 39.9 mm (1.6 in) |
| 2010 | 31.8 mm (1.3 in) |
| 2011 | 19.3 mm (0.8 in) |
| 2012 | 22.9 mm (0.9 in) |
| 2013 | 22.6 mm (0.9 in) |
| 2014 | 55.4 mm (2.2 in) |
| 2015 | 24.6 mm (1.0 in) |
| 2016 | 40.6 mm (1.6 in) |
| 2017 | 25.4 mm (1.0 in) |
| 2018 | 35.6 mm (1.4 in) |
| 2019 | 23.4 mm (0.9 in) |
| 2020 | 22.4 mm (0.9 in) |
| 2021 | 63.2 mm (2.5 in) |
| 2022 | 39.9 mm (1.6 in) |
| 2023 | 26.7 mm (1.1 in) |
| 2024 | 31.5 mm (1.2 in) |
| 2025 | 25.7 mm (1.0 in) |
| 2026 | 41.9 mm (1.6 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1906 | 80.6 mm (3.2 in) |
| 1907 | 58.2 mm (2.3 in) |
| 1908 | 40.4 mm (1.6 in) |
| 1909 | 43.9 mm (1.7 in) |
| 1910 | 49.6 mm (2.0 in) |
| 1911 | 72.4 mm (2.9 in) |
| 1912 | 25.5 mm (1.0 in) |
| 1913 | 38.1 mm (1.5 in) |
| 1914 | 93.0 mm (3.7 in) |
| 1915 | 51.8 mm (2.0 in) |
| 1916 | 43.2 mm (1.7 in) |
| 1917 | n/a |
| 1918 | n/a |
| 1927 | 43.9 mm (1.7 in) |
| 1928 | 45.8 mm (1.8 in) |
| 1929 | 29.2 mm (1.1 in) |
| 1930 | 36.6 mm (1.4 in) |
| 1931 | 55.5 mm (2.2 in) |
| 1932 | 55.4 mm (2.2 in) |
| 1933 | 49.2 mm (1.9 in) |
| 1934 | 58.8 mm (2.3 in) |
| 1935 | 59.4 mm (2.3 in) |
| 1936 | 60.9 mm (2.4 in) |
| 1937 | 80.5 mm (3.2 in) |
| 1938 | 55.1 mm (2.2 in) |
| 1939 | 32.5 mm (1.3 in) |
| 1940 | 73.7 mm (2.9 in) |
| 1941 | 57.5 mm (2.3 in) |
| 1942 | 48.1 mm (1.9 in) |
| 1943 | 39.7 mm (1.6 in) |
| 1944 | 58.6 mm (2.3 in) |
| 1945 | 65.3 mm (2.6 in) |
| 1946 | 28.7 mm (1.1 in) |
| 1947 | 35.0 mm (1.4 in) |
| 1948 | 49.1 mm (1.9 in) |
| 1949 | 28.0 mm (1.1 in) |
| 1950 | 73.3 mm (2.9 in) |
| 1951 | 73.4 mm (2.9 in) |
| 1952 | 38.3 mm (1.5 in) |
| 1953 | 28.8 mm (1.1 in) |
| 1954 | 41.5 mm (1.6 in) |
| 1955 | 85.9 mm (3.4 in) |
| 1956 | 36.6 mm (1.4 in) |
| 1957 | 42.0 mm (1.7 in) |
| 1958 | 119.0 mm (4.7 in) |
| 1959 | 52.8 mm (2.1 in) |
| 1960 | 41.8 mm (1.6 in) |
| 1961 | 62.7 mm (2.5 in) |
| 1962 | 83.3 mm (3.3 in) |
| 1963 | 65.0 mm (2.6 in) |
| 1964 | 47.0 mm (1.9 in) |
| 1965 | 55.3 mm (2.2 in) |
| 1966 | 44.9 mm (1.8 in) |
| 1967 | 79.5 mm (3.1 in) |
| 1968 | 47.0 mm (1.9 in) |
| 1969 | 44.6 mm (1.8 in) |
| 1970 | 97.1 mm (3.8 in) |
| 1971 | 60.9 mm (2.4 in) |
| 1972 | 59.4 mm (2.3 in) |
| 1973 | 46.8 mm (1.8 in) |
| 1974 | 45.2 mm (1.8 in) |
| 1975 | 31.5 mm (1.2 in) |
| 1976 | 25.6 mm (1.0 in) |
| 1977 | 41.1 mm (1.6 in) |
| 1978 | 104.5 mm (4.1 in) |
| 1979 | 49.1 mm (1.9 in) |
| 1980 | 70.9 mm (2.8 in) |
| 1981 | 59.7 mm (2.4 in) |
| 1982 | 62.5 mm (2.5 in) |
| 1983 | 82.5 mm (3.2 in) |
| 1984 | 28.7 mm (1.1 in) |
| 1985 | 38.8 mm (1.5 in) |
| 1986 | 78.7 mm (3.1 in) |
| 1987 | 50.6 mm (2.0 in) |
| 1988 | 42.5 mm (1.7 in) |
| 1989 | 26.5 mm (1.0 in) |
| 1990 | 40.4 mm (1.6 in) |
| 1991 | 55.1 mm (2.2 in) |
| 1992 | 86.8 mm (3.4 in) |
| 1993 | 69.8 mm (2.7 in) |
| 1994 | 33.2 mm (1.3 in) |
| 1995 | 76.1 mm (3.0 in) |
| 1996 | 52.3 mm (2.1 in) |
| 1997 | 55.4 mm (2.2 in) |
| 1998 | 106.7 mm (4.2 in) |
| 1999 | 49.3 mm (1.9 in) |
| 2000 | 61.0 mm (2.4 in) |
| 2001 | 57.0 mm (2.2 in) |
| 2002 | 64.3 mm (2.5 in) |
| 2003 | 30.2 mm (1.2 in) |
| 2004 | 62.0 mm (2.4 in) |
| 2005 | 51.1 mm (2.0 in) |
| 2006 | 55.1 mm (2.2 in) |
| 2007 | 27.0 mm (1.1 in) |
| 2008 | 52.1 mm (2.1 in) |
| 2009 | 39.9 mm (1.6 in) |
| 2010 | 78.2 mm (3.1 in) |
| 2011 | 47.8 mm (1.9 in) |
| 2012 | 62.4 mm (2.5 in) |
| 2013 | 28.7 mm (1.1 in) |
| 2014 | 92.7 mm (3.6 in) |
| 2015 | 35.2 mm (1.4 in) |
| 2016 | 66.9 mm (2.6 in) |
| 2017 | 62.9 mm (2.5 in) |
| 2018 | 55.0 mm (2.2 in) |
| 2019 | 49.6 mm (2.0 in) |
| 2020 | 36.3 mm (1.4 in) |
| 2021 | 94.3 mm (3.7 in) |
| 2022 | 88.2 mm (3.5 in) |
| 2023 | 59.2 mm (2.3 in) |
| 2024 | 62.0 mm (2.4 in) |
| 2025 | 70.1 mm (2.8 in) |
| 2026 | 65.7 mm (2.6 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1906 | 106 days |
| 1907 | 55 days |
| 1908 | 46 days |
| 1909 | 153 days |
| 1910 | 175 days |
| 1911 | 149 days |
| 1912 | 73 days |
| 1913 | 123 days |
| 1914 | 77 days |
| 1915 | 31 days |
| 1916 | 49 days |
| 1917 | 1 day |
| 1918 | 1 day |
| 1927 | 140 days |
| 1928 | 173 days |
| 1929 | 112 days |
| 1930 | 114 days |
| 1931 | 71 days |
| 1932 | 182 days |
| 1933 | 160 days |
| 1934 | 108 days |
| 1935 | 153 days |
| 1936 | 57 days |
| 1937 | 157 days |
| 1938 | 62 days |
| 1939 | 112 days |
| 1940 | 180 days |
| 1941 | 172 days |
| 1942 | 138 days |
| 1943 | 174 days |
| 1944 | 145 days |
| 1945 | 91 days |
| 1946 | 126 days |
| 1947 | 121 days |
| 1948 | 132 days |
| 1949 | 171 days |
| 1950 | 136 days |
| 1951 | 173 days |
| 1952 | 105 days |
| 1953 | 84 days |
| 1954 | 148 days |
| 1955 | 132 days |
| 1956 | 133 days |
| 1957 | 111 days |
| 1958 | 107 days |
| 1959 | 113 days |
| 1960 | 108 days |
| 1961 | 99 days |
| 1962 | 146 days |
| 1963 | 124 days |
| 1964 | 141 days |
| 1965 | 111 days |
| 1966 | 98 days |
| 1967 | 118 days |
| 1968 | 150 days |
| 1969 | 154 days |
| 1970 | 132 days |
| 1971 | 143 days |
| 1972 | 108 days |
| 1973 | 176 days |
| 1974 | 109 days |
| 1975 | 115 days |
| 1976 | 125 days |
| 1977 | 123 days |
| 1978 | 130 days |
| 1979 | 83 days |
| 1980 | 153 days |
| 1981 | 137 days |
| 1982 | 77 days |
| 1983 | 105 days |
| 1984 | 173 days |
| 1985 | 97 days |
| 1986 | 86 days |
| 1987 | 173 days |
| 1988 | 128 days |
| 1989 | 75 days |
| 1990 | 116 days |
| 1991 | 71 days |
| 1992 | 101 days |
| 1993 | 126 days |
| 1994 | 138 days |
| 1995 | 94 days |
| 1996 | 160 days |
| 1997 | 126 days |
| 1998 | 139 days |
| 1999 | 141 days |
| 2000 | 84 days |
| 2001 | 156 days |
| 2002 | 170 days |
| 2003 | 109 days |
| 2004 | 113 days |
| 2005 | 94 days |
| 2006 | 73 days |
| 2007 | 141 days |
| 2008 | 132 days |
| 2009 | 100 days |
| 2010 | 128 days |
| 2011 | 96 days |
| 2012 | 140 days |
| 2013 | 88 days |
| 2014 | 152 days |
| 2015 | 139 days |
| 2016 | 160 days |
| 2017 | 141 days |
| 2018 | 179 days |
| 2019 | 112 days |
| 2020 | 158 days |
| 2021 | 215 days |
| 2022 | 109 days |
| 2023 | 170 days |
| 2024 | 181 days |
| 2025 | 150 days |
| 2026 | 161 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
82 years with a frostAcross 82 years with a frost, the median last spring frost at Modesto AP falls on 15 February and the median first autumn frost on 28 November, which leaves a median of 291 days between them.
In 1987 to 2023 the median growing season was 306 days. That is 41 days more than in 1929 to 1962.
Fitted over all years, the growing season changes by +6.0 days per decade at this station.
| Measure | Median, all years | Earliest period (1929 to 1962) | Recent period (1987 to 2023) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 15 February | 4 March | 5 February | 27 days earlier | -3.9 days per decade |
| First autumn frost | 28 November | 21 November | 3 December | 12 days later | +2.1 days per decade |
| Growing days | 291 days | 265 days | 306 days | 41 days more | +6.0 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
103 years, 1907 to 2025A day with at least 28.5 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 69.8 mm (2.7 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 28.5 mm (1.1 in) | |
| 5 years | 37.9 mm (1.5 in) | |
| 10 years | 44.8 mm (1.8 in) | |
| 25 years | 54.2 mm (2.1 in) | |
| 50 years | 61.8 mm (2.4 in) | |
| 100 years | 69.8 mm (2.7 in) |
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 103 years of values from 1907 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: 69.1 mm (2.7 in) in 1978; 63.2 mm (2.5 in) in 2021; 57.2 mm (2.3 in) in 1970.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Modesto AP, at 1950. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1950 ran 0.5 C (1.0 F) higher than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1950 | +0.5 | +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, Modesto AP had a mean temperature of 17.7 C (63.9 F) and 294.8 mm (11.6 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Porterville (United States, 244 km away), Tombstone (United States, 1,192 km away) and Tumacacori Nm (United States, 1,128 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Porterville | United States | 244 km (152 mi) | 17.7 C (63.9 F) | 280.0 mm (11.0 in) | 0.58 |
| Tombstone | United States | 1,192 km (741 mi) | 17.5 C (63.5 F) | 341.4 mm (13.4 in) | 0.73 |
| Tumacacori Nm | United States | 1,128 km (701 mi) | 17.9 C (64.2 F) | 407.6 mm (16.0 in) | 0.73 |
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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-15).