Petaluma AP Weather Records (USC00046826)
Record envelope, standing records and threshold days for Petaluma AP (USC00046826), California, United States, with 134 years of record.
Key Facts for Petaluma AP
- Petaluma AP (USC00046826) is a weather station in California, United States at 38.26 latitude and -122.61 longitude, 6 m (20 ft) above sea level.
- The station reports from 1893 to 2026, 134 years of record.
- 1,464 records set at Petaluma AP still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Petaluma AP set a daily record precipitation of 1.0 mm (0.04 in) on 4 September 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: California, United States, 38.26 latitude, -122.61 longitude.
- Elevation: 6 m (20 ft).
- Period of record: 1893 to 2026, 134 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
4 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 29.4 C (84.9 F) | -7.8 C (18.0 F) | 20.6 C (69.1 F) | -0.6 C (30.9 F) |
| Feb | 31.7 C (89.1 F) | -7.8 C (18.0 F) | 25.0 C (77.0 F) | 0.0 C (32.0 F) |
| Mar | 33.9 C (93.0 F) | -4.4 C (24.1 F) | 32.2 C (90.0 F) | 4.4 C (39.9 F) |
| Apr | 36.1 C (97.0 F) | -4.4 C (24.1 F) | 27.8 C (82.0 F) | 3.3 C (37.9 F) |
| May | 38.3 C (100.9 F) | -2.8 C (27.0 F) | 30.6 C (87.1 F) | 7.8 C (46.0 F) |
| Jun | 43.3 C (109.9 F) | 0.0 C (32.0 F) | 36.1 C (97.0 F) | 7.2 C (45.0 F) |
| Jul | 43.3 C (109.9 F) | 3.9 C (39.0 F) | 35.6 C (96.1 F) | 9.4 C (48.9 F) |
| Aug | 40.6 C (105.1 F) | 3.9 C (39.0 F) | 33.3 C (91.9 F) | 9.4 C (48.9 F) |
| Sep | 42.8 C (109.0 F) | -0.6 C (30.9 F) | 36.1 C (97.0 F) | 8.9 C (48.0 F) |
| Oct | 41.1 C (106.0 F) | -3.9 C (25.0 F) | 36.1 C (97.0 F) | 10.0 C (50.0 F) |
| Nov | 32.8 C (91.0 F) | -6.7 C (19.9 F) | n/a | n/a |
| Dec | 27.2 C (81.0 F) | -8.9 C (16.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1893 | 3 |
| 1913 | 35 |
| 1914 | 23 |
| 1915 | 17 |
| 1916 | 30 |
| 1917 | 40 |
| 1918 | 76 |
| 1919 | 68 |
| 1920 | 37 |
| 1921 | 57 |
| 1922 | 25 |
| 1923 | 26 |
| 1924 | 20 |
| 1925 | 14 |
| 1926 | 34 |
| 1927 | 2 |
| 1928 | 17 |
| 1929 | 48 |
| 1930 | 34 |
| 1931 | 12 |
| 1932 | 17 |
| 1933 | 9 |
| 1934 | 21 |
| 1935 | 15 |
| 1936 | 9 |
| 1937 | 22 |
| 1938 | 6 |
| 1939 | 12 |
| 1940 | 7 |
| 1941 | 7 |
| 1942 | 4 |
| 1943 | 9 |
| 1944 | 3 |
| 1945 | 6 |
| 1946 | 9 |
| 1947 | 8 |
| 1948 | 14 |
| 1949 | 8 |
| 1950 | 12 |
| 1951 | 5 |
| 1952 | 3 |
| 1953 | 6 |
| 1954 | 9 |
| 1955 | 24 |
| 1956 | 4 |
| 1957 | 8 |
| 1958 | 9 |
| 1959 | 10 |
| 1960 | 10 |
| 1961 | 15 |
| 1962 | 8 |
| 1963 | 17 |
| 1964 | 14 |
| 1965 | 11 |
| 1966 | 15 |
| 1967 | 11 |
| 1968 | 10 |
| 1969 | 5 |
| 1970 | 13 |
| 1971 | 9 |
| 1972 | 18 |
| 1973 | 12 |
| 1974 | 9 |
| 1975 | 6 |
| 1976 | 13 |
| 1977 | 10 |
| 1978 | 5 |
| 1979 | 5 |
| 1980 | 5 |
| 1981 | 8 |
| 1982 | 7 |
| 1983 | 3 |
| 1984 | 11 |
| 1985 | 19 |
| 1986 | 5 |
| 1987 | 9 |
| 1988 | 11 |
| 1989 | 15 |
| 1990 | 5 |
| 1991 | 6 |
| 1992 | 9 |
| 1993 | 12 |
| 1994 | 12 |
| 1995 | 14 |
| 1996 | 10 |
| 1997 | 10 |
| 1998 | 9 |
| 1999 | 7 |
| 2000 | 7 |
| 2001 | 3 |
| 2002 | 2 |
| 2003 | 6 |
| 2004 | 2 |
| 2005 | 3 |
| 2006 | 6 |
| 2007 | 6 |
| 2008 | 6 |
| 2009 | 7 |
| 2010 | 7 |
| 2011 | 9 |
| 2012 | 4 |
| 2013 | 8 |
| 2014 | 7 |
| 2015 | 15 |
| 2016 | 2 |
| 2017 | 11 |
| 2018 | 4 |
| 2019 | 6 |
| 2020 | 7 |
| 2021 | 6 |
| 2022 | 9 |
| 2023 | 7 |
| 2024 | 4 |
| 2025 | 6 |
| 2026 | 7 |
All-Time Record Progression
7 new records| Date | Kind | Detail |
|---|---|---|
| 1960-06-02 | Record high maximum temperature | Record high maximum temperature 43.3 C (109.9 F) |
| 1968-01-08 | Record low maximum temperature | Record low maximum temperature 3.9 C (39.0 F) |
| 1972-12-09 | Record low maximum temperature | Record low maximum temperature 3.3 C (37.9 F) |
| 1972-12-15 | Record low maximum temperature | Record low maximum temperature 2.2 C (36.0 F) |
| 1979-01-10 | Record daily precipitation | Record daily precipitation 103.1 mm (4.1 in) |
| 2004-12-27 | Record daily precipitation | Record daily precipitation 109.0 mm (4.3 in) |
| 2021-10-24 | Record daily precipitation | Record daily precipitation 131.3 mm (5.2 in) |
Wettest Day of Each Month
Oct: 131.3 mm (5.2 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 103.1 mm (4.1 in) | 10 January 1979 |
| Feb | 97.0 mm (3.8 in) | 11 February 1925 |
| Mar | 93.7 mm (3.7 in) | 9 March 1995 |
| Apr | 64.8 mm (2.6 in) | 6 April 2018 |
| May | 57.4 mm (2.3 in) | 21 May 1921 |
| Jun | 44.5 mm (1.8 in) | 2 June 1967 |
| Jul | 23.1 mm (0.9 in) | 8 July 1974 |
| Aug | 25.4 mm (1.0 in) | 20 August 1997 |
| Sep | 50.8 mm (2.0 in) | 13 September 1918 |
| Oct | 131.3 mm (5.2 in) | 24 October 2021 |
| Nov | 96.0 mm (3.8 in) | 28 November 1970 |
| Dec | 109.0 mm (4.3 in) | 27 December 2004 |
Period of Record Coverage
1893 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1893 | 31 | 8% | No |
| 1913 | 310 | 85% | No |
| 1914 | 364 | 100% | Yes |
| 1915 | 363 | 99% | Yes |
| 1916 | 366 | 100% | Yes |
| 1917 | 365 | 100% | Yes |
| 1918 | 364 | 100% | Yes |
| 1919 | 363 | 99% | Yes |
| 1920 | 364 | 99% | Yes |
| 1921 | 361 | 99% | Yes |
| 1922 | 352 | 96% | Yes |
| 1923 | 355 | 97% | Yes |
| 1924 | 366 | 100% | Yes |
| 1925 | 359 | 98% | Yes |
| 1926 | 365 | 100% | Yes |
| 1927 | 106 | 29% | No |
| 1928 | 364 | 99% | Yes |
| 1929 | 365 | 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 | 365 | 100% | Yes |
| 1940 | 366 | 100% | Yes |
| 1941 | 365 | 100% | Yes |
| 1942 | 365 | 100% | Yes |
| 1943 | 359 | 98% | Yes |
| 1944 | 366 | 100% | Yes |
| 1945 | 360 | 99% | Yes |
| 1946 | 364 | 100% | Yes |
| 1947 | 357 | 98% | Yes |
| 1948 | 361 | 99% | Yes |
| 1949 | 361 | 99% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 350 | 96% | Yes |
| 1954 | 359 | 98% | Yes |
| 1955 | 360 | 99% | Yes |
| 1956 | 362 | 99% | Yes |
| 1957 | 364 | 100% | Yes |
| 1958 | 363 | 99% | Yes |
| 1959 | 361 | 99% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 364 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 364 | 100% | Yes |
| 1964 | 364 | 99% | Yes |
| 1965 | 364 | 100% | Yes |
| 1966 | 363 | 99% | Yes |
| 1967 | 333 | 91% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 360 | 99% | Yes |
| 1970 | 361 | 99% | 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 | 364 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 364 | 100% | Yes |
| 1982 | 364 | 100% | Yes |
| 1983 | 332 | 91% | Yes |
| 1984 | 365 | 100% | Yes |
| 1985 | 362 | 99% | Yes |
| 1986 | 365 | 100% | Yes |
| 1987 | 364 | 100% | Yes |
| 1988 | 365 | 100% | Yes |
| 1989 | 365 | 100% | Yes |
| 1990 | 241 | 66% | No |
| 1991 | 194 | 53% | No |
| 1992 | 350 | 96% | Yes |
| 1993 | 363 | 99% | Yes |
| 1994 | 364 | 100% | Yes |
| 1995 | 358 | 98% | Yes |
| 1996 | 360 | 98% | Yes |
| 1997 | 353 | 97% | Yes |
| 1998 | 358 | 98% | Yes |
| 1999 | 313 | 86% | No |
| 2000 | 308 | 84% | No |
| 2001 | 310 | 85% | No |
| 2002 | 353 | 97% | Yes |
| 2003 | 322 | 88% | No |
| 2004 | 318 | 87% | No |
| 2005 | 306 | 84% | No |
| 2006 | 306 | 84% | No |
| 2007 | 324 | 89% | No |
| 2008 | 312 | 85% | No |
| 2009 | 312 | 85% | No |
| 2010 | 322 | 88% | No |
| 2011 | 346 | 95% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 363 | 99% | Yes |
| 2015 | 365 | 100% | Yes |
| 2016 | 366 | 100% | Yes |
| 2017 | 365 | 100% | Yes |
| 2018 | 365 | 100% | Yes |
| 2019 | 356 | 98% | Yes |
| 2020 | 357 | 98% | Yes |
| 2021 | 361 | 99% | Yes |
| 2022 | 352 | 96% | Yes |
| 2023 | 363 | 99% | Yes |
| 2024 | 354 | 97% | Yes |
| 2025 | 361 | 99% | Yes |
| 2026 | 263 | 72% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 4 September 2026 | Petaluma AP, US | daily rain (Provisional) | 1.0 mm (0.04 in) | 1.0 mm (0.04 in) | 131 years | 20 of 100 (Routine) |
| 3 September 2026 | Petaluma AP, US | daily rain (Provisional) | 1.8 mm (0.07 in) | 1.5 mm (0.06 in) | 23 years | 17 of 100 (Routine) |
| 22 July 2026 | Petaluma AP, US | daily high min | 17.8 C (64.0 F) | 2.2 C (4.0 F) | 20 years | 26 of 100 (Routine) |
| 12 June 2026 | Petaluma AP, US | daily high max | 35.0 C (95.0 F) | 1.1 C (2.0 F) | 7 years | 14 of 100 (Routine) |
| 10 April 2026 | Petaluma AP, US | daily high min | 12.8 C (55.0 F) | 0.6 C (1.1 F) | 84 years | 37 of 100 (Notable) |
| 1 April 2026 | Petaluma AP, US | daily high min (Tie) | 11.7 C (53.1 F) | tie | 104 years | 10 of 100 (Routine) |
| 31 March 2026 | Petaluma AP, US | daily high min (Tie) | 12.8 C (55.0 F) | tie | 56 years | 6 of 100 (Routine) |
| 21 March 2026 | Petaluma AP, US | daily high max | 31.1 C (88.0 F) | 0.5 C (0.9 F) | 96 years | 39 of 100 (Notable) |
| 20 March 2026 | Petaluma AP, US | daily high max | 32.2 C (90.0 F) | 4.4 C (7.9 F) | 96 years | 49 of 100 (Notable) |
| 19 March 2026 | Petaluma AP, US | daily high max | 30.6 C (87.1 F) | 0.6 C (1.1 F) | 112 years | 41 of 100 (Notable) |
| 1 March 2026 | Petaluma AP, US | daily high min | 12.2 C (54.0 F) | 0.5 C (0.9 F) | 68 years | 31 of 100 (Routine) |
| 21 December 2025 | Petaluma AP, US | daily high min | 13.9 C (57.0 F) | 0.6 C (1.1 F) | 70 years | 32 of 100 (Routine) |
| 20 December 2025 | Petaluma AP, US | daily high min (Tie) | 13.3 C (55.9 F) | tie | 70 years | 7 of 100 (Routine) |
| 30 November 2025 | Petaluma AP, US | daily low max | 10.0 C (50.0 F) | 0.6 C (1.1 F) | 58 years | 28 of 100 (Routine) |
| 13 November 2025 | Petaluma AP, US | daily high min | 14.4 C (57.9 F) | 1.6 C (2.9 F) | 60 years | 32 of 100 (Routine) |
| 13 November 2025 | Petaluma AP, US | daily rain | 29.7 mm (1.2 in) | 2.5 mm (0.10 in) | 52 years | 27 of 100 (Routine) |
| 5 November 2025 | Petaluma AP, US | daily high min (Tie) | 13.3 C (55.9 F) | tie | 55 years | 6 of 100 (Routine) |
| 15 October 2025 | Petaluma AP, US | daily low max (Tie) | 16.7 C (62.1 F) | tie | 80 years | 8 of 100 (Routine) |
| 14 October 2025 | Petaluma AP, US | daily low max | 13.3 C (55.9 F) | 2.3 C (4.1 F) | 108 years | 44 of 100 (Notable) |
| 9 September 2025 | Petaluma AP, US | daily high min | 17.2 C (63.0 F) | 1.6 C (2.9 F) | 80 years | 40 of 100 (Notable) |
Climate Trend
100 complete years, 1914 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1914 | 13.6 C | -0.76 C |
| 1915 | 13.5 C | -0.77 C |
| 1916 | 12.8 C | -1.47 C |
| 1917 | 13.1 C | -1.21 C |
| 1918 | 11.9 C | -2.38 C |
| 1919 | 12.2 C | -2.09 C |
| 1920 | 14.3 C | -0.02 C |
| 1922 | 14.2 C | -0.12 C |
| 1923 | 14.2 C | -0.16 C |
| 1924 | 14.2 C | -0.12 C |
| 1925 | 13.7 C | -0.62 C |
| 1926 | 14.6 C | +0.26 C |
| 1928 | 14.5 C | +0.14 C |
| 1929 | 14.6 C | +0.24 C |
| 1930 | 14.3 C | -0.01 C |
| 1931 | 14.4 C | +0.09 C |
| 1932 | 13.6 C | -0.76 C |
| 1933 | 13.4 C | -0.95 C |
| 1934 | 14.9 C | +0.60 C |
| 1935 | 13.7 C | -0.65 C |
| 1936 | 14.7 C | +0.37 C |
| 1937 | 13.9 C | -0.45 C |
| 1938 | 14.1 C | -0.24 C |
| 1939 | 14.6 C | +0.29 C |
| 1940 | 14.9 C | +0.56 C |
| 1941 | 14.9 C | +0.61 C |
| 1942 | 14.3 C | +0.01 C |
| 1943 | 14.8 C | +0.51 C |
| 1944 | 14.3 C | -0.02 C |
| 1945 | 14.1 C | -0.17 C |
| 1946 | 13.4 C | -0.91 C |
| 1948 | 13.4 C | -0.95 C |
| 1949 | 14.2 C | -0.16 C |
| 1950 | 14.7 C | +0.36 C |
| 1951 | 14.1 C | -0.25 C |
| 1952 | 14.1 C | -0.18 C |
| 1953 | 14.5 C | +0.14 C |
| 1954 | 14.0 C | -0.34 C |
| 1955 | 13.6 C | -0.74 C |
| 1956 | 13.7 C | -0.58 C |
| 1957 | 14.3 C | -0.02 C |
| 1958 | 15.4 C | +1.09 C |
| 1959 | 15.1 C | +0.77 C |
| 1960 | 14.5 C | +0.17 C |
| 1961 | 14.2 C | -0.08 C |
| 1962 | 14.1 C | -0.22 C |
| 1963 | 13.8 C | -0.47 C |
| 1964 | 13.9 C | -0.45 C |
| 1965 | 13.9 C | -0.38 C |
| 1966 | 14.4 C | +0.05 C |
| 1968 | 14.4 C | +0.10 C |
| 1969 | 14.3 C | +0.02 C |
| 1970 | 14.7 C | +0.36 C |
| 1971 | 13.9 C | -0.44 C |
| 1972 | 14.1 C | -0.20 C |
| 1973 | 14.6 C | +0.27 C |
| 1974 | 14.6 C | +0.25 C |
| 1975 | 13.8 C | -0.49 C |
| 1976 | 14.6 C | +0.26 C |
| 1977 | 14.3 C | -0.01 C |
| 1978 | 14.7 C | +0.35 C |
| 1979 | 14.5 C | +0.22 C |
| 1980 | 14.4 C | +0.12 C |
| 1981 | 14.9 C | +0.60 C |
| 1982 | 13.6 C | -0.75 C |
| 1984 | 14.8 C | +0.48 C |
| 1985 | 13.9 C | -0.45 C |
| 1986 | 14.9 C | +0.62 C |
| 1987 | 14.9 C | +0.63 C |
| 1988 | 14.9 C | +0.62 C |
| 1989 | 14.2 C | -0.10 C |
| 1992 | 14.7 C | +0.43 C |
| 1993 | 14.2 C | -0.10 C |
| 1994 | 13.5 C | -0.81 C |
| 1995 | 14.9 C | +0.54 C |
| 1996 | 14.9 C | +0.56 C |
| 1997 | 15.5 C | +1.14 C |
| 2002 | 14.6 C | +0.32 C |
| 2003 | 14.8 C | +0.47 C |
| 2004 | 15.0 C | +0.65 C |
| 2005 | 14.5 C | +0.16 C |
| 2006 | 14.3 C | +0.03 C |
| 2007 | 14.2 C | -0.07 C |
| 2008 | 14.3 C | -0.05 C |
| 2009 | 14.1 C | -0.17 C |
| 2011 | 13.7 C | -0.65 C |
| 2012 | 14.2 C | -0.10 C |
| 2013 | 14.1 C | -0.18 C |
| 2014 | 15.8 C | +1.50 C |
| 2015 | 15.4 C | +1.07 C |
| 2016 | 14.9 C | +0.55 C |
| 2017 | 14.9 C | +0.60 C |
| 2018 | 14.5 C | +0.15 C |
| 2019 | 15.0 C | +0.71 C |
| 2020 | 15.3 C | +0.99 C |
| 2021 | 14.8 C | +0.44 C |
| 2022 | 14.7 C | +0.34 C |
| 2023 | 14.5 C | +0.18 C |
| 2024 | 15.3 C | +1.01 C |
| 2025 | 14.8 C | +0.48 C |
The annual mean temperature here has risen by 0.1 C (0.1 to 0.1) per decade over 1914 to 2025. In Fahrenheit: 0.2 F (0.1 to 0.2) per decade. The slope is a straight line fitted to 100 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.1 C (0.1 to 0.1) per decade | 0.2 F (0.1 to 0.2) per decade | 1914 to 2025 | 100 | Rise |
| Mean daily maximum | 0.06 C (0.01 to 0.10) per decade | 0.10 F (0.02 to 0.18) per decade | 1914 to 2025 | 100 | Rise |
| Mean daily minimum | 0.1 C (0.1 to 0.2) per decade | 0.2 F (0.2 to 0.3) per decade | 1914 to 2025 | 100 | 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
1893 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 43.3 C (109.9 F) | 1960 | 38.9 C (102.0 F) | 115 |
| Coldest night (TNn) | -8.9 C (16.0 F) | 1932 | -3.9 C (25.0 F) | 115 |
| Wettest day (Rx1day) | 131.3 mm (5.2 in) | 2021 | 52.1 mm (2.1 in) | 117 |
| Wettest five days (Rx5day) | 244.6 mm (9.6 in) | 1986 | 105.0 mm (4.1 in) | 117 |
| Longest dry spell (CDD) | 180 days | 2003 | 110 days | 117 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1893 | 25.6 C (78.1 F) |
| 1894 | n/a |
| 1895 | n/a |
| 1913 | 42.8 C (109.0 F) |
| 1914 | 36.7 C (98.1 F) |
| 1915 | 37.2 C (99.0 F) |
| 1916 | 38.3 C (100.9 F) |
| 1917 | 39.4 C (102.9 F) |
| 1918 | 35.6 C (96.1 F) |
| 1919 | 41.7 C (107.1 F) |
| 1920 | 38.9 C (102.0 F) |
| 1921 | 40.6 C (105.1 F) |
| 1922 | 38.3 C (100.9 F) |
| 1923 | 38.9 C (102.0 F) |
| 1924 | 38.3 C (100.9 F) |
| 1925 | 40.6 C (105.1 F) |
| 1926 | 40.6 C (105.1 F) |
| 1927 | 32.2 C (90.0 F) |
| 1928 | 38.9 C (102.0 F) |
| 1929 | 36.7 C (98.1 F) |
| 1930 | 36.7 C (98.1 F) |
| 1931 | 40.6 C (105.1 F) |
| 1932 | 39.4 C (102.9 F) |
| 1933 | 39.4 C (102.9 F) |
| 1934 | 39.4 C (102.9 F) |
| 1935 | 37.8 C (100.0 F) |
| 1936 | 39.4 C (102.9 F) |
| 1937 | 38.9 C (102.0 F) |
| 1938 | 36.7 C (98.1 F) |
| 1939 | 40.0 C (104.0 F) |
| 1940 | 37.2 C (99.0 F) |
| 1941 | 36.7 C (98.1 F) |
| 1942 | 37.2 C (99.0 F) |
| 1943 | 40.0 C (104.0 F) |
| 1944 | 42.2 C (108.0 F) |
| 1945 | 36.7 C (98.1 F) |
| 1946 | 39.4 C (102.9 F) |
| 1947 | 35.0 C (95.0 F) |
| 1948 | 38.9 C (102.0 F) |
| 1949 | 39.4 C (102.9 F) |
| 1950 | 40.6 C (105.1 F) |
| 1951 | 38.9 C (102.0 F) |
| 1952 | 39.4 C (102.9 F) |
| 1953 | 38.9 C (102.0 F) |
| 1954 | 40.0 C (104.0 F) |
| 1955 | 42.2 C (108.0 F) |
| 1956 | 38.3 C (100.9 F) |
| 1957 | 40.6 C (105.1 F) |
| 1958 | 38.9 C (102.0 F) |
| 1959 | 42.8 C (109.0 F) |
| 1960 | 43.3 C (109.9 F) |
| 1961 | 43.3 C (109.9 F) |
| 1962 | 38.3 C (100.9 F) |
| 1963 | 38.9 C (102.0 F) |
| 1964 | 40.0 C (104.0 F) |
| 1965 | 35.6 C (96.1 F) |
| 1966 | 37.8 C (100.0 F) |
| 1967 | 37.8 C (100.0 F) |
| 1968 | 40.6 C (105.1 F) |
| 1969 | 37.2 C (99.0 F) |
| 1970 | 39.4 C (102.9 F) |
| 1971 | 42.8 C (109.0 F) |
| 1972 | 43.3 C (109.9 F) |
| 1973 | 40.6 C (105.1 F) |
| 1974 | 37.8 C (100.0 F) |
| 1975 | 38.9 C (102.0 F) |
| 1976 | 41.7 C (107.1 F) |
| 1977 | 40.0 C (104.0 F) |
| 1978 | 37.8 C (100.0 F) |
| 1979 | 42.2 C (108.0 F) |
| 1980 | 41.1 C (106.0 F) |
| 1981 | 38.9 C (102.0 F) |
| 1982 | 37.8 C (100.0 F) |
| 1983 | 39.4 C (102.9 F) |
| 1984 | 39.4 C (102.9 F) |
| 1985 | 37.8 C (100.0 F) |
| 1986 | 36.7 C (98.1 F) |
| 1987 | 37.8 C (100.0 F) |
| 1988 | 41.7 C (107.1 F) |
| 1989 | 37.2 C (99.0 F) |
| 1990 | 38.9 C (102.0 F) |
| 1991 | 40.6 C (105.1 F) |
| 1992 | 35.6 C (96.1 F) |
| 1993 | 40.0 C (104.0 F) |
| 1994 | 37.2 C (99.0 F) |
| 1995 | 39.4 C (102.9 F) |
| 1996 | 38.9 C (102.0 F) |
| 1997 | 37.2 C (99.0 F) |
| 1998 | 39.4 C (102.9 F) |
| 1999 | 37.8 C (100.0 F) |
| 2000 | 41.7 C (107.1 F) |
| 2001 | 38.3 C (100.9 F) |
| 2002 | 38.3 C (100.9 F) |
| 2003 | 38.3 C (100.9 F) |
| 2004 | 37.2 C (99.0 F) |
| 2005 | 36.1 C (97.0 F) |
| 2006 | 41.1 C (106.0 F) |
| 2007 | 36.1 C (97.0 F) |
| 2008 | 38.3 C (100.9 F) |
| 2009 | 37.8 C (100.0 F) |
| 2010 | 39.4 C (102.9 F) |
| 2011 | 35.0 C (95.0 F) |
| 2012 | 37.8 C (100.0 F) |
| 2013 | 36.1 C (97.0 F) |
| 2014 | 36.1 C (97.0 F) |
| 2015 | 37.8 C (100.0 F) |
| 2016 | 36.7 C (98.1 F) |
| 2017 | 41.7 C (107.1 F) |
| 2018 | 33.9 C (93.0 F) |
| 2019 | 37.2 C (99.0 F) |
| 2020 | 41.7 C (107.1 F) |
| 2021 | 37.2 C (99.0 F) |
| 2022 | 42.8 C (109.0 F) |
| 2023 | 36.7 C (98.1 F) |
| 2024 | 39.4 C (102.9 F) |
| 2025 | 35.0 C (95.0 F) |
| 2026 | 36.1 C (97.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1893 | 0.6 C (33.1 F) |
| 1894 | n/a |
| 1895 | n/a |
| 1913 | -3.3 C (26.1 F) |
| 1914 | -3.9 C (25.0 F) |
| 1915 | -7.8 C (18.0 F) |
| 1916 | -6.7 C (19.9 F) |
| 1917 | -6.1 C (21.0 F) |
| 1918 | -6.1 C (21.0 F) |
| 1919 | -7.8 C (18.0 F) |
| 1920 | -5.6 C (21.9 F) |
| 1921 | 0.0 C (32.0 F) |
| 1922 | -3.9 C (25.0 F) |
| 1923 | -5.0 C (23.0 F) |
| 1924 | -6.1 C (21.0 F) |
| 1925 | -3.3 C (26.1 F) |
| 1926 | -8.3 C (17.1 F) |
| 1927 | -2.8 C (27.0 F) |
| 1928 | -4.4 C (24.1 F) |
| 1929 | -4.4 C (24.1 F) |
| 1930 | -6.1 C (21.0 F) |
| 1931 | -3.9 C (25.0 F) |
| 1932 | -8.9 C (16.0 F) |
| 1933 | -3.9 C (25.0 F) |
| 1934 | -1.7 C (28.9 F) |
| 1935 | -4.4 C (24.1 F) |
| 1936 | -4.4 C (24.1 F) |
| 1937 | -7.8 C (18.0 F) |
| 1938 | -3.3 C (26.1 F) |
| 1939 | -1.7 C (28.9 F) |
| 1940 | -4.4 C (24.1 F) |
| 1941 | -2.2 C (28.0 F) |
| 1942 | -3.3 C (26.1 F) |
| 1943 | -5.0 C (23.0 F) |
| 1944 | -1.7 C (28.9 F) |
| 1945 | -4.4 C (24.1 F) |
| 1946 | -3.3 C (26.1 F) |
| 1947 | -4.4 C (24.1 F) |
| 1948 | -4.4 C (24.1 F) |
| 1949 | -5.6 C (21.9 F) |
| 1950 | -4.4 C (24.1 F) |
| 1951 | -2.8 C (27.0 F) |
| 1952 | -3.3 C (26.1 F) |
| 1953 | -2.2 C (28.0 F) |
| 1954 | -3.3 C (26.1 F) |
| 1955 | -3.3 C (26.1 F) |
| 1956 | -5.0 C (23.0 F) |
| 1957 | -6.1 C (21.0 F) |
| 1958 | -4.4 C (24.1 F) |
| 1959 | -3.9 C (25.0 F) |
| 1960 | -5.6 C (21.9 F) |
| 1961 | -6.1 C (21.0 F) |
| 1962 | -5.0 C (23.0 F) |
| 1963 | -6.7 C (19.9 F) |
| 1964 | -3.9 C (25.0 F) |
| 1965 | -4.4 C (24.1 F) |
| 1966 | -3.3 C (26.1 F) |
| 1967 | -3.9 C (25.0 F) |
| 1968 | -5.0 C (23.0 F) |
| 1969 | -2.8 C (27.0 F) |
| 1970 | -3.3 C (26.1 F) |
| 1971 | -4.4 C (24.1 F) |
| 1972 | -7.2 C (19.0 F) |
| 1973 | -4.4 C (24.1 F) |
| 1974 | -3.9 C (25.0 F) |
| 1975 | -5.6 C (21.9 F) |
| 1976 | -5.0 C (23.0 F) |
| 1977 | -2.2 C (28.0 F) |
| 1978 | -6.1 C (21.0 F) |
| 1979 | -5.0 C (23.0 F) |
| 1980 | -3.3 C (26.1 F) |
| 1981 | 0.0 C (32.0 F) |
| 1982 | -3.9 C (25.0 F) |
| 1983 | 0.0 C (32.0 F) |
| 1984 | -3.3 C (26.1 F) |
| 1985 | -4.4 C (24.1 F) |
| 1986 | -1.1 C (30.0 F) |
| 1987 | -2.8 C (27.0 F) |
| 1988 | -2.8 C (27.0 F) |
| 1989 | -7.8 C (18.0 F) |
| 1990 | -3.3 C (26.1 F) |
| 1991 | -5.0 C (23.0 F) |
| 1992 | -2.2 C (28.0 F) |
| 1993 | -5.0 C (23.0 F) |
| 1994 | -2.8 C (27.0 F) |
| 1995 | 0.0 C (32.0 F) |
| 1996 | -1.7 C (28.9 F) |
| 1997 | -3.3 C (26.1 F) |
| 1998 | -6.1 C (21.0 F) |
| 1999 | -2.8 C (27.0 F) |
| 2000 | -1.7 C (28.9 F) |
| 2001 | -2.2 C (28.0 F) |
| 2002 | -3.3 C (26.1 F) |
| 2003 | -2.8 C (27.0 F) |
| 2004 | -2.8 C (27.0 F) |
| 2005 | -2.8 C (27.0 F) |
| 2006 | -3.9 C (25.0 F) |
| 2007 | -6.1 C (21.0 F) |
| 2008 | -4.4 C (24.1 F) |
| 2009 | -6.7 C (19.9 F) |
| 2010 | -2.8 C (27.0 F) |
| 2011 | -3.9 C (25.0 F) |
| 2012 | -5.6 C (21.9 F) |
| 2013 | -6.7 C (19.9 F) |
| 2014 | -2.8 C (27.0 F) |
| 2015 | -4.4 C (24.1 F) |
| 2016 | -4.4 C (24.1 F) |
| 2017 | -3.3 C (26.1 F) |
| 2018 | -3.3 C (26.1 F) |
| 2019 | -2.8 C (27.0 F) |
| 2020 | -1.7 C (28.9 F) |
| 2021 | -2.8 C (27.0 F) |
| 2022 | -3.3 C (26.1 F) |
| 2023 | -2.2 C (28.0 F) |
| 2024 | 0.6 C (33.1 F) |
| 2025 | -1.1 C (30.0 F) |
| 2026 | -0.6 C (30.9 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1893 | 39.4 mm (1.6 in) |
| 1894 | 75.7 mm (3.0 in) |
| 1895 | 47.0 mm (1.9 in) |
| 1913 | 71.1 mm (2.8 in) |
| 1914 | 75.2 mm (3.0 in) |
| 1915 | 69.9 mm (2.8 in) |
| 1916 | 101.6 mm (4.0 in) |
| 1917 | 41.1 mm (1.6 in) |
| 1918 | 50.8 mm (2.0 in) |
| 1919 | 48.0 mm (1.9 in) |
| 1920 | 38.1 mm (1.5 in) |
| 1921 | 64.5 mm (2.5 in) |
| 1922 | 35.8 mm (1.4 in) |
| 1923 | 31.5 mm (1.2 in) |
| 1924 | 69.9 mm (2.8 in) |
| 1925 | 97.0 mm (3.8 in) |
| 1926 | 61.2 mm (2.4 in) |
| 1927 | 38.1 mm (1.5 in) |
| 1928 | 40.1 mm (1.6 in) |
| 1929 | 79.8 mm (3.1 in) |
| 1930 | 35.8 mm (1.4 in) |
| 1931 | 72.1 mm (2.8 in) |
| 1932 | 41.9 mm (1.6 in) |
| 1933 | 44.7 mm (1.8 in) |
| 1934 | 48.3 mm (1.9 in) |
| 1935 | 52.1 mm (2.1 in) |
| 1936 | 46.2 mm (1.8 in) |
| 1937 | 53.3 mm (2.1 in) |
| 1938 | 46.5 mm (1.8 in) |
| 1939 | 36.8 mm (1.4 in) |
| 1940 | 68.3 mm (2.7 in) |
| 1941 | 62.2 mm (2.4 in) |
| 1942 | 61.0 mm (2.4 in) |
| 1943 | 64.3 mm (2.5 in) |
| 1944 | 46.0 mm (1.8 in) |
| 1945 | 81.3 mm (3.2 in) |
| 1946 | 35.6 mm (1.4 in) |
| 1947 | 38.9 mm (1.5 in) |
| 1948 | 39.9 mm (1.6 in) |
| 1949 | 36.6 mm (1.4 in) |
| 1950 | 70.4 mm (2.8 in) |
| 1951 | 56.6 mm (2.2 in) |
| 1952 | 56.1 mm (2.2 in) |
| 1953 | 47.0 mm (1.9 in) |
| 1954 | 45.2 mm (1.8 in) |
| 1955 | 72.4 mm (2.9 in) |
| 1956 | 64.5 mm (2.5 in) |
| 1957 | 44.5 mm (1.8 in) |
| 1958 | 48.0 mm (1.9 in) |
| 1959 | 61.7 mm (2.4 in) |
| 1960 | 43.4 mm (1.7 in) |
| 1961 | 45.5 mm (1.8 in) |
| 1962 | 74.7 mm (2.9 in) |
| 1963 | 62.0 mm (2.4 in) |
| 1964 | 38.9 mm (1.5 in) |
| 1965 | 39.4 mm (1.6 in) |
| 1966 | 50.3 mm (2.0 in) |
| 1967 | 91.4 mm (3.6 in) |
| 1968 | 52.3 mm (2.1 in) |
| 1969 | 43.9 mm (1.7 in) |
| 1970 | 96.0 mm (3.8 in) |
| 1971 | 28.2 mm (1.1 in) |
| 1972 | 28.7 mm (1.1 in) |
| 1973 | 51.8 mm (2.0 in) |
| 1974 | 52.3 mm (2.1 in) |
| 1975 | 45.5 mm (1.8 in) |
| 1976 | 24.1 mm (0.9 in) |
| 1977 | 76.5 mm (3.0 in) |
| 1978 | 60.5 mm (2.4 in) |
| 1979 | 103.1 mm (4.1 in) |
| 1980 | 62.0 mm (2.4 in) |
| 1981 | 93.5 mm (3.7 in) |
| 1982 | 91.9 mm (3.6 in) |
| 1983 | 66.3 mm (2.6 in) |
| 1984 | 36.3 mm (1.4 in) |
| 1985 | 57.2 mm (2.3 in) |
| 1986 | 81.3 mm (3.2 in) |
| 1987 | 63.0 mm (2.5 in) |
| 1988 | 29.7 mm (1.2 in) |
| 1989 | 36.8 mm (1.4 in) |
| 1990 | 50.0 mm (2.0 in) |
| 1991 | 32.0 mm (1.3 in) |
| 1992 | 42.7 mm (1.7 in) |
| 1993 | 40.6 mm (1.6 in) |
| 1994 | 63.8 mm (2.5 in) |
| 1995 | 96.5 mm (3.8 in) |
| 1996 | 46.5 mm (1.8 in) |
| 1997 | 51.6 mm (2.0 in) |
| 1998 | 83.3 mm (3.3 in) |
| 1999 | 61.0 mm (2.4 in) |
| 2000 | 51.8 mm (2.0 in) |
| 2001 | 49.8 mm (2.0 in) |
| 2002 | 57.4 mm (2.3 in) |
| 2003 | 38.4 mm (1.5 in) |
| 2004 | 109.0 mm (4.3 in) |
| 2005 | 102.1 mm (4.0 in) |
| 2006 | 62.7 mm (2.5 in) |
| 2007 | 21.6 mm (0.9 in) |
| 2008 | 72.4 mm (2.9 in) |
| 2009 | 64.8 mm (2.6 in) |
| 2010 | 46.2 mm (1.8 in) |
| 2011 | 43.4 mm (1.7 in) |
| 2012 | 51.6 mm (2.0 in) |
| 2013 | 18.3 mm (0.7 in) |
| 2014 | 102.6 mm (4.0 in) |
| 2015 | 36.3 mm (1.4 in) |
| 2016 | 55.9 mm (2.2 in) |
| 2017 | 54.6 mm (2.1 in) |
| 2018 | 64.8 mm (2.6 in) |
| 2019 | 58.4 mm (2.3 in) |
| 2020 | 33.0 mm (1.3 in) |
| 2021 | 131.3 mm (5.2 in) |
| 2022 | 60.5 mm (2.4 in) |
| 2023 | 47.0 mm (1.9 in) |
| 2024 | 57.2 mm (2.3 in) |
| 2025 | 53.3 mm (2.1 in) |
| 2026 | 43.2 mm (1.7 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1893 | 90.1 mm (3.5 in) |
| 1894 | 115.9 mm (4.6 in) |
| 1895 | 87.3 mm (3.4 in) |
| 1913 | 98.2 mm (3.9 in) |
| 1914 | 152.6 mm (6.0 in) |
| 1915 | 126.8 mm (5.0 in) |
| 1916 | 172.7 mm (6.8 in) |
| 1917 | 103.3 mm (4.1 in) |
| 1918 | 70.1 mm (2.8 in) |
| 1919 | 95.5 mm (3.8 in) |
| 1920 | 85.8 mm (3.4 in) |
| 1921 | 122.9 mm (4.8 in) |
| 1922 | 103.6 mm (4.1 in) |
| 1923 | 60.0 mm (2.4 in) |
| 1924 | 79.7 mm (3.1 in) |
| 1925 | 145.5 mm (5.7 in) |
| 1926 | 160.7 mm (6.3 in) |
| 1927 | 73.2 mm (2.9 in) |
| 1928 | 103.0 mm (4.1 in) |
| 1929 | 105.0 mm (4.1 in) |
| 1930 | 62.5 mm (2.5 in) |
| 1931 | 137.2 mm (5.4 in) |
| 1932 | 78.7 mm (3.1 in) |
| 1933 | 90.9 mm (3.6 in) |
| 1934 | 97.5 mm (3.8 in) |
| 1935 | 69.3 mm (2.7 in) |
| 1936 | 115.6 mm (4.6 in) |
| 1937 | 101.9 mm (4.0 in) |
| 1938 | 111.5 mm (4.4 in) |
| 1939 | 52.3 mm (2.1 in) |
| 1940 | 139.4 mm (5.5 in) |
| 1941 | 121.9 mm (4.8 in) |
| 1942 | 146.4 mm (5.8 in) |
| 1943 | 142.5 mm (5.6 in) |
| 1944 | 95.3 mm (3.8 in) |
| 1945 | 141.5 mm (5.6 in) |
| 1946 | 74.7 mm (2.9 in) |
| 1947 | 57.4 mm (2.3 in) |
| 1948 | 53.3 mm (2.1 in) |
| 1949 | 85.4 mm (3.4 in) |
| 1950 | 131.9 mm (5.2 in) |
| 1951 | 122.9 mm (4.8 in) |
| 1952 | 123.7 mm (4.9 in) |
| 1953 | 61.1 mm (2.4 in) |
| 1954 | 87.6 mm (3.4 in) |
| 1955 | 201.7 mm (7.9 in) |
| 1956 | 109.2 mm (4.3 in) |
| 1957 | 101.9 mm (4.0 in) |
| 1958 | 116.8 mm (4.6 in) |
| 1959 | 120.7 mm (4.8 in) |
| 1960 | 76.0 mm (3.0 in) |
| 1961 | 129.4 mm (5.1 in) |
| 1962 | 184.2 mm (7.3 in) |
| 1963 | 138.3 mm (5.4 in) |
| 1964 | 101.9 mm (4.0 in) |
| 1965 | 104.4 mm (4.1 in) |
| 1966 | 94.0 mm (3.7 in) |
| 1967 | 210.0 mm (8.3 in) |
| 1968 | 87.3 mm (3.4 in) |
| 1969 | 76.2 mm (3.0 in) |
| 1970 | 164.1 mm (6.5 in) |
| 1971 | 65.2 mm (2.6 in) |
| 1972 | 87.3 mm (3.4 in) |
| 1973 | 146.6 mm (5.8 in) |
| 1974 | 77.7 mm (3.1 in) |
| 1975 | 84.6 mm (3.3 in) |
| 1976 | 45.7 mm (1.8 in) |
| 1977 | 103.4 mm (4.1 in) |
| 1978 | 144.3 mm (5.7 in) |
| 1979 | 182.2 mm (7.2 in) |
| 1980 | 183.9 mm (7.2 in) |
| 1981 | 143.3 mm (5.6 in) |
| 1982 | 201.9 mm (7.9 in) |
| 1983 | 182.1 mm (7.2 in) |
| 1984 | 79.8 mm (3.1 in) |
| 1985 | 69.7 mm (2.7 in) |
| 1986 | 244.6 mm (9.6 in) |
| 1987 | 77.8 mm (3.1 in) |
| 1988 | 56.1 mm (2.2 in) |
| 1989 | 48.3 mm (1.9 in) |
| 1990 | 83.5 mm (3.3 in) |
| 1991 | 117.4 mm (4.6 in) |
| 1992 | 110.5 mm (4.4 in) |
| 1993 | 99.1 mm (3.9 in) |
| 1994 | 121.4 mm (4.8 in) |
| 1995 | 179.9 mm (7.1 in) |
| 1996 | 101.4 mm (4.0 in) |
| 1997 | 135.4 mm (5.3 in) |
| 1998 | 222.8 mm (8.8 in) |
| 1999 | 115.8 mm (4.6 in) |
| 2000 | 138.1 mm (5.4 in) |
| 2001 | 93.6 mm (3.7 in) |
| 2002 | 184.9 mm (7.3 in) |
| 2003 | 54.3 mm (2.1 in) |
| 2004 | 169.7 mm (6.7 in) |
| 2005 | 160.5 mm (6.3 in) |
| 2006 | 159.2 mm (6.3 in) |
| 2007 | 78.0 mm (3.1 in) |
| 2008 | 111.7 mm (4.4 in) |
| 2009 | 110.7 mm (4.4 in) |
| 2010 | 155.1 mm (6.1 in) |
| 2011 | 99.0 mm (3.9 in) |
| 2012 | 122.7 mm (4.8 in) |
| 2013 | 27.4 mm (1.1 in) |
| 2014 | 184.4 mm (7.3 in) |
| 2015 | 73.5 mm (2.9 in) |
| 2016 | 94.3 mm (3.7 in) |
| 2017 | 138.5 mm (5.5 in) |
| 2018 | 92.7 mm (3.6 in) |
| 2019 | 113.5 mm (4.5 in) |
| 2020 | 36.1 mm (1.4 in) |
| 2021 | 196.3 mm (7.7 in) |
| 2022 | 129.9 mm (5.1 in) |
| 2023 | 104.7 mm (4.1 in) |
| 2024 | 156.8 mm (6.2 in) |
| 2025 | 114.6 mm (4.5 in) |
| 2026 | 92.5 mm (3.6 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1893 | 74 days |
| 1894 | 48 days |
| 1895 | 36 days |
| 1913 | 100 days |
| 1914 | 37 days |
| 1915 | 22 days |
| 1916 | 43 days |
| 1917 | 50 days |
| 1918 | 63 days |
| 1919 | 78 days |
| 1920 | 29 days |
| 1921 | 30 days |
| 1922 | 31 days |
| 1923 | 41 days |
| 1924 | 40 days |
| 1925 | 52 days |
| 1926 | 135 days |
| 1927 | 25 days |
| 1928 | 149 days |
| 1929 | 76 days |
| 1930 | 124 days |
| 1931 | 127 days |
| 1932 | 154 days |
| 1933 | 136 days |
| 1934 | 89 days |
| 1935 | 117 days |
| 1936 | 143 days |
| 1937 | 93 days |
| 1938 | 148 days |
| 1939 | 125 days |
| 1940 | 96 days |
| 1941 | 115 days |
| 1942 | 105 days |
| 1943 | 140 days |
| 1944 | 117 days |
| 1945 | 128 days |
| 1946 | 62 days |
| 1947 | 98 days |
| 1948 | 118 days |
| 1949 | 62 days |
| 1950 | 155 days |
| 1951 | 140 days |
| 1952 | 110 days |
| 1953 | 83 days |
| 1954 | 77 days |
| 1955 | 136 days |
| 1956 | 130 days |
| 1957 | 128 days |
| 1958 | 105 days |
| 1959 | 70 days |
| 1960 | 133 days |
| 1961 | 106 days |
| 1962 | 154 days |
| 1963 | 134 days |
| 1964 | 90 days |
| 1965 | 111 days |
| 1966 | 84 days |
| 1967 | 120 days |
| 1968 | 85 days |
| 1969 | 172 days |
| 1970 | 130 days |
| 1971 | 120 days |
| 1972 | 108 days |
| 1973 | 159 days |
| 1974 | 109 days |
| 1975 | 82 days |
| 1976 | 124 days |
| 1977 | 112 days |
| 1978 | 112 days |
| 1979 | 140 days |
| 1980 | 101 days |
| 1981 | 90 days |
| 1982 | 155 days |
| 1983 | 103 days |
| 1984 | 85 days |
| 1985 | 86 days |
| 1986 | 130 days |
| 1987 | 174 days |
| 1988 | 128 days |
| 1989 | 115 days |
| 1990 | 61 days |
| 1991 | 27 days |
| 1992 | 91 days |
| 1993 | 123 days |
| 1994 | 120 days |
| 1995 | 136 days |
| 1996 | 115 days |
| 1997 | 75 days |
| 1998 | 147 days |
| 1999 | 119 days |
| 2000 | 85 days |
| 2001 | 136 days |
| 2002 | 169 days |
| 2003 | 180 days |
| 2004 | 113 days |
| 2005 | 118 days |
| 2006 | 135 days |
| 2007 | 74 days |
| 2008 | 90 days |
| 2009 | 102 days |
| 2010 | 142 days |
| 2011 | 95 days |
| 2012 | 178 days |
| 2013 | 87 days |
| 2014 | 65 days |
| 2015 | 68 days |
| 2016 | 147 days |
| 2017 | 149 days |
| 2018 | 128 days |
| 2019 | 101 days |
| 2020 | 76 days |
| 2021 | 144 days |
| 2022 | 104 days |
| 2023 | 139 days |
| 2024 | 76 days |
| 2025 | 131 days |
| 2026 | 96 days |
Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.
Frost Dates and Growing Season
92 years with a frostAcross 92 years with a frost, the median last spring frost at Petaluma AP falls on 13 March and the median first autumn frost on 18 November, which leaves a median of 252 days between them.
In 1986 to 2023 the median growing season was 274 days. That is 29 days more than in 1914 to 1948.
Fitted over all years, the growing season changes by +3.7 days per decade at this station.
| Measure | Median, all years | Earliest period (1914 to 1948) | Recent period (1986 to 2023) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 13 March | 21 March | 27 February | 22 days earlier | -2.2 days per decade |
| First autumn frost | 18 November | 10 November | 24 November | 14 days later | +1.4 days per decade |
| Growing days | 252 days | 245 days | 274 days | 29 days more | +3.7 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
96 years, 1913 to 2025A day with at least 54.2 mm (2.1 in) of rain is expected about once in 2 years. A day with at least 125.6 mm (4.9 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 54.2 mm (2.1 in) | |
| 5 years | 72.9 mm (2.9 in) | |
| 10 years | 85.5 mm (3.4 in) | |
| 25 years | 101.5 mm (4.0 in) | |
| 50 years | 113.6 mm (4.5 in) | |
| 100 years | 125.6 mm (4.9 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 1913 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: 131.3 mm (5.2 in) in 2021; 109.0 mm (4.3 in) in 2004; 103.1 mm (4.1 in) in 1979.
Station Changes
3 suspected3 changes were suspected in the annual mean temperature of Petaluma AP, at 1954, 1977 and 2009. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1954 ran 0.3 C (0.5 F) lower than in the years before (likely change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1977 ran 0.1 C (0.2 F) lower than in the years before (likely change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 2009 ran 0.2 C (0.3 F) lower than in the years before (possible change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1954 | -0.3 | -0.5 | likely | 5 |
| 1977 | -0.1 | -0.2 | likely | 5 |
| 2009 | -0.2 | -0.3 | possible | 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, Petaluma AP had a mean temperature of 14.8 C (58.6 F) and 591.0 mm (23.3 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Los Gatos (United States, 128 km away), Gilroy (United States, 167 km away) and Moffett Fed Airfield (United States, 107 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Los Gatos | United States | 128 km (80 mi) | 15.0 C (58.9 F) | 571.3 mm (22.5 in) | 0.65 |
| Gilroy | United States | 167 km (104 mi) | 15.2 C (59.3 F) | 535.9 mm (21.1 in) | 1.04 |
| Moffett Fed Airfield | United States | 107 km (66 mi) | 15.2 C (59.4 F) | 351.6 mm (13.8 in) | 1.23 |
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 2026-10-12 (12 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-13).