Napa State Hospital Weather Records (USC00046074)
Record envelope, standing records and threshold days for Napa State Hospital (USC00046074), California, United States, with 134 years of record.
Key Facts for Napa State Hospital
- Napa State Hospital (USC00046074) is a weather station in California, United States at 38.28 latitude and -122.26 longitude, 11 m (35 ft) above sea level.
- The station reports from 1893 to 2026, 134 years of record.
- 1,464 records set at Napa State Hospital still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Napa State Hospital set a daily record high minimum temperature of 16.7 C (62.1 F) on 5 October 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: California, United States, 38.28 latitude, -122.26 longitude.
- Elevation: 11 m (35 ft).
- Period of record: 1893 to 2026, 134 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
9 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) | -7.2 C (19.0 F) | 20.6 C (69.1 F) | 1.1 C (34.0 F) |
| Feb | 30.0 C (86.0 F) | -5.0 C (23.0 F) | 25.6 C (78.1 F) | 0.0 C (32.0 F) |
| Mar | 33.3 C (91.9 F) | -5.0 C (23.0 F) | 33.3 C (91.9 F) | 3.9 C (39.0 F) |
| Apr | 35.0 C (95.0 F) | -2.8 C (27.0 F) | 30.0 C (86.0 F) | 5.6 C (42.1 F) |
| May | 40.0 C (104.0 F) | -1.1 C (30.0 F) | 32.2 C (90.0 F) | 7.2 C (45.0 F) |
| Jun | 45.0 C (113.0 F) | 1.1 C (34.0 F) | 36.7 C (98.1 F) | 8.9 C (48.0 F) |
| Jul | 44.4 C (111.9 F) | 3.3 C (37.9 F) | 37.2 C (99.0 F) | 10.6 C (51.1 F) |
| Aug | 43.3 C (109.9 F) | 2.8 C (37.0 F) | 32.8 C (91.0 F) | 10.6 C (51.1 F) |
| Sep | 45.6 C (114.1 F) | 2.2 C (36.0 F) | 38.9 C (102.0 F) | 8.9 C (48.0 F) |
| Oct | 41.1 C (106.0 F) | -2.2 C (28.0 F) | 36.7 C (98.1 F) | 7.2 C (45.0 F) |
| Nov | 32.2 C (90.0 F) | -3.9 C (25.0 F) | n/a | n/a |
| Dec | 27.2 C (81.0 F) | -10.0 C (14.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1893 | 4 |
| 1894 | 12 |
| 1895 | 7 |
| 1896 | 12 |
| 1897 | 10 |
| 1898 | 7 |
| 1899 | 6 |
| 1900 | 3 |
| 1901 | 21 |
| 1902 | 5 |
| 1903 | 15 |
| 1904 | 19 |
| 1905 | 15 |
| 1906 | 10 |
| 1907 | 12 |
| 1908 | 7 |
| 1909 | 11 |
| 1910 | 8 |
| 1911 | 24 |
| 1912 | 7 |
| 1913 | 16 |
| 1914 | 19 |
| 1917 | 31 |
| 1918 | 73 |
| 1919 | 21 |
| 1920 | 13 |
| 1921 | 22 |
| 1922 | 9 |
| 1923 | 45 |
| 1924 | 45 |
| 1925 | 25 |
| 1926 | 23 |
| 1927 | 22 |
| 1928 | 17 |
| 1929 | 37 |
| 1930 | 15 |
| 1931 | 17 |
| 1932 | 49 |
| 1933 | 3 |
| 1934 | 6 |
| 1935 | 15 |
| 1936 | 10 |
| 1937 | 18 |
| 1938 | 3 |
| 1939 | 17 |
| 1940 | 7 |
| 1941 | 5 |
| 1942 | 5 |
| 1943 | 14 |
| 1944 | 7 |
| 1945 | 3 |
| 1946 | 10 |
| 1947 | 9 |
| 1948 | 6 |
| 1949 | 27 |
| 1950 | 15 |
| 1951 | 4 |
| 1952 | 6 |
| 1953 | 8 |
| 1954 | 7 |
| 1955 | 10 |
| 1956 | 5 |
| 1957 | 3 |
| 1958 | 8 |
| 1959 | 12 |
| 1960 | 7 |
| 1961 | 15 |
| 1962 | 5 |
| 1963 | 14 |
| 1964 | 9 |
| 1965 | 8 |
| 1966 | 4 |
| 1967 | 9 |
| 1968 | 6 |
| 1969 | 4 |
| 1970 | 4 |
| 1971 | 5 |
| 1972 | 12 |
| 1973 | 7 |
| 1974 | 6 |
| 1975 | 3 |
| 1976 | 13 |
| 1977 | 1 |
| 1978 | 5 |
| 1979 | 4 |
| 1980 | 7 |
| 1981 | 12 |
| 1982 | 13 |
| 1983 | 8 |
| 1984 | 15 |
| 1985 | 11 |
| 1986 | 7 |
| 1987 | 9 |
| 1988 | 6 |
| 1989 | 8 |
| 1990 | 18 |
| 1991 | 2 |
| 1992 | 2 |
| 1993 | 4 |
| 1995 | 8 |
| 1996 | 9 |
| 1997 | 6 |
| 1998 | 9 |
| 1999 | 7 |
| 2000 | 14 |
| 2001 | 4 |
| 2002 | 2 |
| 2003 | 4 |
| 2004 | 11 |
| 2005 | 8 |
| 2006 | 8 |
| 2007 | 8 |
| 2008 | 10 |
| 2009 | 7 |
| 2010 | 4 |
| 2011 | 13 |
| 2012 | 6 |
| 2013 | 5 |
| 2014 | 6 |
| 2015 | 8 |
| 2016 | 8 |
| 2017 | 16 |
| 2018 | 7 |
| 2019 | 4 |
| 2020 | 16 |
| 2021 | 4 |
| 2022 | 8 |
| 2023 | 3 |
| 2024 | 7 |
| 2025 | 5 |
| 2026 | 9 |
All-Time Record Progression
13 new records| Date | Kind | Detail |
|---|---|---|
| 1931-12-27 | Record daily precipitation | Record daily precipitation 104.1 mm (4.1 in) |
| 1932-12-08 | Record low minimum temperature | Record low minimum temperature -6.7 C (19.9 F) |
| 1932-12-09 | Record low minimum temperature | Record low minimum temperature -7.2 C (19.0 F) |
| 1932-12-10 | Record low minimum temperature | Record low minimum temperature -7.8 C (18.0 F) |
| 1932-12-11 | Record low minimum temperature | Record low minimum temperature -8.3 C (17.1 F) |
| 1961-06-14 | Record high maximum temperature | Record high maximum temperature 45.0 C (113.0 F) |
| 1962-10-12 | Record daily precipitation | Record daily precipitation 118.4 mm (4.7 in) |
| 1976-06-24 | Record high minimum temperature | Record high minimum temperature 24.4 C (75.9 F) |
| 1977-11-21 | Record daily precipitation | Record daily precipitation 148.6 mm (5.9 in) |
| 1990-12-22 | Record low minimum temperature | Record low minimum temperature -10.0 C (14.0 F) |
| 2000-06-14 | Record high minimum temperature | Record high minimum temperature 25.0 C (77.0 F) |
| 2008-05-15 | Record high minimum temperature | Record high minimum temperature 26.7 C (80.1 F) |
| 2022-09-06 | Record high maximum temperature | Record high maximum temperature 45.6 C (114.1 F) |
Wettest Day of Each Month
Nov: 148.6 mm (5.9 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 144.5 mm (5.7 in) | 4 January 1982 |
| Feb | 109.2 mm (4.3 in) | 8 February 2014 |
| Mar | 83.8 mm (3.3 in) | 14 March 2003 |
| Apr | 67.6 mm (2.7 in) | 1 April 1996 |
| May | 47.0 mm (1.9 in) | 16 May 1996 |
| Jun | 31.0 mm (1.2 in) | 2 June 1967 |
| Jul | 20.6 mm (0.8 in) | 8 July 1974 |
| Aug | 21.3 mm (0.8 in) | 11 August 1965 |
| Sep | 50.3 mm (2.0 in) | 23 September 1904 |
| Oct | 135.9 mm (5.4 in) | 24 October 2021 |
| Nov | 148.6 mm (5.9 in) | 21 November 1977 |
| Dec | 104.1 mm (4.1 in) | 27 December 1931 |
Period of Record Coverage
1893 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1893 | 363 | 99% | Yes |
| 1894 | 365 | 100% | Yes |
| 1895 | 365 | 100% | Yes |
| 1896 | 366 | 100% | Yes |
| 1897 | 152 | 42% | No |
| 1898 | 6 | 2% | No |
| 1899 | 13 | 4% | No |
| 1900 | 14 | 4% | No |
| 1901 | 251 | 69% | No |
| 1902 | 356 | 98% | Yes |
| 1903 | 361 | 99% | Yes |
| 1904 | 366 | 100% | Yes |
| 1905 | 365 | 100% | Yes |
| 1906 | 360 | 99% | Yes |
| 1907 | 365 | 100% | Yes |
| 1908 | 366 | 100% | Yes |
| 1909 | 365 | 100% | Yes |
| 1910 | 364 | 100% | Yes |
| 1911 | 365 | 100% | Yes |
| 1912 | 366 | 100% | Yes |
| 1913 | 365 | 100% | Yes |
| 1914 | 333 | 91% | Yes |
| 1915 | 45 | 12% | No |
| 1917 | 334 | 92% | Yes |
| 1918 | 364 | 100% | Yes |
| 1919 | 364 | 100% | Yes |
| 1920 | 366 | 100% | Yes |
| 1921 | 334 | 92% | Yes |
| 1922 | 363 | 99% | Yes |
| 1923 | 333 | 91% | Yes |
| 1924 | 359 | 98% | Yes |
| 1925 | 364 | 100% | Yes |
| 1926 | 364 | 100% | Yes |
| 1927 | 363 | 99% | Yes |
| 1928 | 365 | 100% | Yes |
| 1929 | 334 | 92% | Yes |
| 1930 | 365 | 100% | Yes |
| 1931 | 365 | 100% | Yes |
| 1932 | 365 | 100% | Yes |
| 1933 | 172 | 47% | No |
| 1934 | 365 | 100% | Yes |
| 1935 | 365 | 100% | Yes |
| 1936 | 366 | 100% | Yes |
| 1937 | 365 | 100% | Yes |
| 1938 | 365 | 100% | Yes |
| 1939 | 362 | 99% | Yes |
| 1940 | 366 | 100% | Yes |
| 1941 | 365 | 100% | Yes |
| 1942 | 365 | 100% | Yes |
| 1943 | 363 | 99% | Yes |
| 1944 | 335 | 92% | Yes |
| 1945 | 365 | 100% | Yes |
| 1946 | 327 | 90% | No |
| 1947 | 340 | 93% | Yes |
| 1948 | 365 | 100% | Yes |
| 1949 | 364 | 100% | Yes |
| 1950 | 364 | 100% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 363 | 99% | Yes |
| 1956 | 364 | 99% | Yes |
| 1957 | 311 | 85% | No |
| 1958 | 363 | 99% | 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 | 358 | 98% | Yes |
| 1968 | 360 | 98% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 359 | 98% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 360 | 99% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 333 | 91% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 364 | 100% | Yes |
| 1983 | 347 | 95% | Yes |
| 1984 | 365 | 100% | Yes |
| 1985 | 365 | 100% | Yes |
| 1986 | 352 | 96% | Yes |
| 1987 | 365 | 100% | Yes |
| 1988 | 366 | 100% | Yes |
| 1989 | 362 | 99% | Yes |
| 1990 | 360 | 99% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 366 | 100% | Yes |
| 1993 | 365 | 100% | Yes |
| 1994 | 365 | 100% | Yes |
| 1995 | 364 | 100% | Yes |
| 1996 | 333 | 91% | Yes |
| 1997 | 363 | 99% | Yes |
| 1998 | 365 | 100% | Yes |
| 1999 | 365 | 100% | Yes |
| 2000 | 366 | 100% | Yes |
| 2001 | 365 | 100% | Yes |
| 2002 | 364 | 100% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 365 | 100% | Yes |
| 2005 | 364 | 100% | Yes |
| 2006 | 364 | 100% | Yes |
| 2007 | 363 | 99% | Yes |
| 2008 | 365 | 100% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 364 | 100% | Yes |
| 2011 | 364 | 100% | Yes |
| 2012 | 358 | 98% | Yes |
| 2013 | 360 | 99% | Yes |
| 2014 | 359 | 98% | Yes |
| 2015 | 353 | 97% | Yes |
| 2016 | 353 | 96% | Yes |
| 2017 | 346 | 95% | Yes |
| 2018 | 338 | 93% | Yes |
| 2019 | 349 | 96% | Yes |
| 2020 | 351 | 96% | Yes |
| 2021 | 349 | 96% | Yes |
| 2022 | 333 | 91% | Yes |
| 2023 | 327 | 90% | No |
| 2024 | 337 | 92% | Yes |
| 2025 | 336 | 92% | Yes |
| 2026 | 266 | 73% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 5 October 2026 | Napa State Hospital, US | daily high min (Provisional) | 16.7 C (62.1 F) | 0.6 C (1.1 F) | 131 years | 41 of 100 (Notable) |
| 10 September 2026 | Napa State Hospital, US | daily high min (Provisional) | 19.4 C (66.9 F) | 2.7 C (4.9 F) | 68 years | 39 of 100 (Notable) |
| 4 September 2026 | Napa State Hospital, US | daily rain (Provisional) | 2.8 mm (0.11 in) | 0.8 mm (0.03 in) | 125 years | 20 of 100 (Routine) |
| 2 September 2026 | Napa State Hospital, US | daily rain (Provisional) | 0.8 mm (0.03 in) | 0.8 mm (0.03 in) | 132 years | 20 of 100 (Routine) |
| 21 April 2026 | Napa State Hospital, US | daily rain | 35.6 mm (1.4 in) | 20.9 mm (0.8 in) | 71 years | 54 of 100 (Notable) |
| 5 April 2026 | Napa State Hospital, US | daily high max (Tie) | 30.0 C (86.0 F) | tie | 68 years | 7 of 100 (Routine) |
| 31 March 2026 | Napa State Hospital, US | daily high max | 31.1 C (88.0 F) | 0.5 C (0.9 F) | 15 years | 15 of 100 (Routine) |
| 30 March 2026 | Napa State Hospital, US | daily high max | 31.1 C (88.0 F) | 1.1 C (2.0 F) | 15 years | 16 of 100 (Routine) |
| 29 March 2026 | Napa State Hospital, US | daily high max | 31.1 C (88.0 F) | 2.8 C (5.0 F) | 57 years | 33 of 100 (Routine) |
| 28 March 2026 | Napa State Hospital, US | daily high max (Tie) | 28.3 C (82.9 F) | tie | 56 years | 6 of 100 (Routine) |
| 21 March 2026 | Napa State Hospital, US | monthly high max (Tie) | 33.3 C (91.9 F) | tie | 112 years | 12 of 100 (Routine) |
| 20 March 2026 | Napa State Hospital, US | daily high max | 32.2 C (90.0 F) | 2.2 C (4.0 F) | 21 years | 21 of 100 (Routine) |
| 19 March 2026 | Napa State Hospital, US | daily high max | 31.1 C (88.0 F) | 1.1 C (2.0 F) | 112 years | 42 of 100 (Notable) |
| 18 March 2026 | Napa State Hospital, US | daily high max | 31.7 C (89.1 F) | 1.1 C (2.0 F) | 112 years | 42 of 100 (Notable) |
| 25 February 2026 | Napa State Hospital, US | daily high min | 14.4 C (57.9 F) | 2.2 C (4.0 F) | 99 years | 45 of 100 (Notable) |
| 24 February 2026 | Napa State Hospital, US | daily high min | 13.3 C (55.9 F) | 0.5 C (0.9 F) | 68 years | 31 of 100 (Routine) |
| 3 January 2026 | Napa State Hospital, US | daily high min (Tie) | 12.2 C (54.0 F) | tie | 99 years | 9 of 100 (Routine) |
| 13 November 2025 | Napa State Hospital, US | daily high min (Tie) | 14.4 C (57.9 F) | tie | 38 years | 5 of 100 (Routine) |
| 5 November 2025 | Napa State Hospital, US | daily high min | 13.9 C (57.0 F) | 1.7 C (3.1 F) | 112 years | 44 of 100 (Notable) |
| 29 September 2025 | Napa State Hospital, US | daily high min | 16.1 C (61.0 F) | 1.1 C (2.0 F) | 74 years | 36 of 100 (Notable) |
Climate Trend
114 complete years, 1893 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1893 | 14.3 C | -0.61 C |
| 1894 | 15.2 C | +0.30 C |
| 1895 | 15.1 C | +0.24 C |
| 1896 | 14.9 C | +0.04 C |
| 1902 | 14.4 C | -0.47 C |
| 1903 | 14.1 C | -0.76 C |
| 1904 | 14.2 C | -0.73 C |
| 1905 | 14.6 C | -0.31 C |
| 1906 | 15.3 C | +0.44 C |
| 1907 | 14.6 C | -0.33 C |
| 1908 | 14.3 C | -0.60 C |
| 1909 | 14.1 C | -0.75 C |
| 1910 | 14.4 C | -0.51 C |
| 1911 | 12.7 C | -2.15 C |
| 1912 | 14.6 C | -0.27 C |
| 1913 | 15.6 C | +0.75 C |
| 1918 | 13.3 C | -1.63 C |
| 1919 | 13.3 C | -1.58 C |
| 1920 | 13.9 C | -1.01 C |
| 1922 | 13.8 C | -1.06 C |
| 1924 | 13.3 C | -1.55 C |
| 1925 | 13.2 C | -1.73 C |
| 1926 | 13.7 C | -1.18 C |
| 1927 | 13.2 C | -1.71 C |
| 1928 | 13.2 C | -1.67 C |
| 1930 | 14.3 C | -0.57 C |
| 1931 | 15.4 C | +0.52 C |
| 1932 | 14.7 C | -0.21 C |
| 1934 | 15.3 C | +0.45 C |
| 1935 | 13.3 C | -1.60 C |
| 1936 | 14.2 C | -0.67 C |
| 1937 | 13.5 C | -1.38 C |
| 1938 | 14.3 C | -0.60 C |
| 1939 | 15.0 C | +0.09 C |
| 1940 | 15.4 C | +0.51 C |
| 1941 | 15.3 C | +0.43 C |
| 1942 | 14.7 C | -0.19 C |
| 1943 | 15.6 C | +0.68 C |
| 1945 | 14.7 C | -0.16 C |
| 1947 | 15.0 C | +0.11 C |
| 1948 | 13.8 C | -1.06 C |
| 1949 | 13.8 C | -1.11 C |
| 1950 | 14.8 C | -0.09 C |
| 1951 | 14.3 C | -0.55 C |
| 1952 | 14.4 C | -0.51 C |
| 1953 | 14.7 C | -0.23 C |
| 1954 | 14.4 C | -0.47 C |
| 1955 | 14.0 C | -0.84 C |
| 1956 | 14.4 C | -0.44 C |
| 1958 | 15.3 C | +0.45 C |
| 1959 | 15.3 C | +0.38 C |
| 1960 | 14.8 C | -0.06 C |
| 1961 | 14.6 C | -0.24 C |
| 1962 | 14.4 C | -0.52 C |
| 1963 | 14.2 C | -0.71 C |
| 1964 | 14.5 C | -0.40 C |
| 1965 | 14.4 C | -0.52 C |
| 1966 | 15.1 C | +0.19 C |
| 1967 | 14.8 C | -0.05 C |
| 1968 | 15.1 C | +0.25 C |
| 1969 | 14.9 C | +0.05 C |
| 1970 | 15.3 C | +0.37 C |
| 1971 | 14.4 C | -0.44 C |
| 1972 | 14.6 C | -0.31 C |
| 1973 | 15.0 C | +0.15 C |
| 1974 | 14.9 C | -0.03 C |
| 1975 | 14.3 C | -0.58 C |
| 1976 | 15.0 C | +0.13 C |
| 1977 | 14.9 C | +0.06 C |
| 1978 | 15.4 C | +0.48 C |
| 1980 | 15.0 C | +0.12 C |
| 1981 | 15.9 C | +1.01 C |
| 1982 | 14.6 C | -0.33 C |
| 1984 | 15.6 C | +0.76 C |
| 1985 | 14.7 C | -0.16 C |
| 1986 | 15.6 C | +0.76 C |
| 1987 | 15.1 C | +0.22 C |
| 1988 | 15.3 C | +0.45 C |
| 1989 | 14.6 C | -0.26 C |
| 1990 | 14.7 C | -0.16 C |
| 1991 | 14.8 C | -0.10 C |
| 1992 | 15.5 C | +0.61 C |
| 1993 | 15.1 C | +0.23 C |
| 1994 | 14.6 C | -0.25 C |
| 1995 | 16.0 C | +1.09 C |
| 1997 | 16.2 C | +1.28 C |
| 1998 | 15.0 C | +0.10 C |
| 1999 | 14.8 C | -0.08 C |
| 2000 | 15.4 C | +0.56 C |
| 2001 | 15.7 C | +0.83 C |
| 2002 | 15.4 C | +0.55 C |
| 2003 | 15.9 C | +0.97 C |
| 2004 | 16.0 C | +1.08 C |
| 2005 | 15.6 C | +0.70 C |
| 2006 | 15.4 C | +0.52 C |
| 2007 | 15.5 C | +0.65 C |
| 2008 | 15.5 C | +0.64 C |
| 2009 | 15.4 C | +0.56 C |
| 2010 | 15.1 C | +0.22 C |
| 2011 | 14.9 C | -0.03 C |
| 2012 | 15.5 C | +0.64 C |
| 2013 | 15.6 C | +0.73 C |
| 2014 | 16.9 C | +2.04 C |
| 2015 | 16.5 C | +1.61 C |
| 2016 | 16.0 C | +1.16 C |
| 2017 | 16.2 C | +1.31 C |
| 2018 | 15.7 C | +0.86 C |
| 2019 | 16.0 C | +1.12 C |
| 2020 | 16.6 C | +1.74 C |
| 2021 | 15.6 C | +0.71 C |
| 2022 | 15.8 C | +0.93 C |
| 2023 | 15.2 C | +0.34 C |
| 2024 | 16.4 C | +1.49 C |
| 2025 | 15.6 C | +0.75 C |
The annual mean temperature here has risen by 0.1 C (0.1 to 0.2) per decade over 1893 to 2025. In Fahrenheit: 0.3 F (0.2 to 0.3) per decade. The slope is a straight line fitted to 114 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 0.2) per decade | 0.3 F (0.2 to 0.3) per decade | 1893 to 2025 | 114 | Rise |
| Mean daily maximum | 0.2 C (0.1 to 0.2) per decade | 0.3 F (0.3 to 0.4) per decade | 1893 to 2025 | 114 | Rise |
| Mean daily minimum | 0.1 C (0.1 to 0.1) per decade | 0.2 F (0.1 to 0.3) per decade | 1893 to 2025 | 114 | 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) | 45.6 C (114.1 F) | 2022 | 38.9 C (102.0 F) | 133 |
| Coldest night (TNn) | -10.0 C (14.0 F) | 1990 | -2.8 C (27.0 F) | 133 |
| Wettest day (Rx1day) | 148.6 mm (5.9 in) | 1977 | 53.3 mm (2.1 in) | 132 |
| Wettest five days (Rx5day) | 263.4 mm (10.4 in) | 1962 | 109.0 mm (4.3 in) | 131 |
| Longest dry spell (CDD) | 175 days | 1987 | 108 days | 132 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1893 | 33.3 C (91.9 F) |
| 1894 | 38.9 C (102.0 F) |
| 1895 | 34.4 C (93.9 F) |
| 1896 | 38.3 C (100.9 F) |
| 1897 | 37.8 C (100.0 F) |
| 1898 | 41.1 C (106.0 F) |
| 1899 | 38.9 C (102.0 F) |
| 1900 | 43.3 C (109.9 F) |
| 1901 | 41.1 C (106.0 F) |
| 1902 | 39.4 C (102.9 F) |
| 1903 | 42.2 C (108.0 F) |
| 1904 | 43.3 C (109.9 F) |
| 1905 | 43.3 C (109.9 F) |
| 1906 | 39.4 C (102.9 F) |
| 1907 | 37.2 C (99.0 F) |
| 1908 | 38.9 C (102.0 F) |
| 1909 | 42.2 C (108.0 F) |
| 1910 | 40.0 C (104.0 F) |
| 1911 | 33.9 C (93.0 F) |
| 1912 | 39.4 C (102.9 F) |
| 1913 | 41.1 C (106.0 F) |
| 1914 | 38.3 C (100.9 F) |
| 1915 | 21.7 C (71.1 F) |
| 1916 | n/a |
| 1917 | 41.7 C (107.1 F) |
| 1918 | 36.7 C (98.1 F) |
| 1919 | 40.0 C (104.0 F) |
| 1920 | 43.3 C (109.9 F) |
| 1921 | 41.1 C (106.0 F) |
| 1922 | 37.8 C (100.0 F) |
| 1923 | 38.3 C (100.9 F) |
| 1924 | 35.0 C (95.0 F) |
| 1925 | 36.7 C (98.1 F) |
| 1926 | 37.8 C (100.0 F) |
| 1927 | 36.7 C (98.1 F) |
| 1928 | 38.9 C (102.0 F) |
| 1929 | 40.6 C (105.1 F) |
| 1930 | 37.2 C (99.0 F) |
| 1931 | 41.1 C (106.0 F) |
| 1932 | 40.6 C (105.1 F) |
| 1933 | 38.3 C (100.9 F) |
| 1934 | 40.0 C (104.0 F) |
| 1935 | 37.8 C (100.0 F) |
| 1936 | 38.3 C (100.9 F) |
| 1937 | 36.1 C (97.0 F) |
| 1938 | 36.7 C (98.1 F) |
| 1939 | 41.1 C (106.0 F) |
| 1940 | 38.9 C (102.0 F) |
| 1941 | 36.7 C (98.1 F) |
| 1942 | 37.8 C (100.0 F) |
| 1943 | 40.0 C (104.0 F) |
| 1944 | 42.8 C (109.0 F) |
| 1945 | 40.0 C (104.0 F) |
| 1946 | 40.6 C (105.1 F) |
| 1947 | 38.9 C (102.0 F) |
| 1948 | 38.9 C (102.0 F) |
| 1949 | 40.6 C (105.1 F) |
| 1950 | 41.1 C (106.0 F) |
| 1951 | 38.9 C (102.0 F) |
| 1952 | 40.6 C (105.1 F) |
| 1953 | 39.4 C (102.9 F) |
| 1954 | 42.2 C (108.0 F) |
| 1955 | 42.8 C (109.0 F) |
| 1956 | 37.8 C (100.0 F) |
| 1957 | 40.6 C (105.1 F) |
| 1958 | 38.3 C (100.9 F) |
| 1959 | 40.0 C (104.0 F) |
| 1960 | 42.2 C (108.0 F) |
| 1961 | 45.0 C (113.0 F) |
| 1962 | 40.0 C (104.0 F) |
| 1963 | 40.6 C (105.1 F) |
| 1964 | 40.0 C (104.0 F) |
| 1965 | 36.7 C (98.1 F) |
| 1966 | 40.6 C (105.1 F) |
| 1967 | 38.9 C (102.0 F) |
| 1968 | 40.6 C (105.1 F) |
| 1969 | 37.8 C (100.0 F) |
| 1970 | 40.0 C (104.0 F) |
| 1971 | 42.2 C (108.0 F) |
| 1972 | 44.4 C (111.9 F) |
| 1973 | 41.1 C (106.0 F) |
| 1974 | 38.3 C (100.9 F) |
| 1975 | 38.3 C (100.9 F) |
| 1976 | 41.1 C (106.0 F) |
| 1977 | 39.4 C (102.9 F) |
| 1978 | 37.8 C (100.0 F) |
| 1979 | 41.7 C (107.1 F) |
| 1980 | 41.1 C (106.0 F) |
| 1981 | 42.8 C (109.0 F) |
| 1982 | 38.9 C (102.0 F) |
| 1983 | 40.6 C (105.1 F) |
| 1984 | 38.9 C (102.0 F) |
| 1985 | 38.3 C (100.9 F) |
| 1986 | 37.8 C (100.0 F) |
| 1987 | 38.3 C (100.9 F) |
| 1988 | 41.1 C (106.0 F) |
| 1989 | 38.3 C (100.9 F) |
| 1990 | 38.3 C (100.9 F) |
| 1991 | 38.3 C (100.9 F) |
| 1992 | 36.7 C (98.1 F) |
| 1993 | 39.4 C (102.9 F) |
| 1994 | 37.8 C (100.0 F) |
| 1995 | 39.4 C (102.9 F) |
| 1996 | 38.3 C (100.9 F) |
| 1997 | 37.8 C (100.0 F) |
| 1998 | 41.1 C (106.0 F) |
| 1999 | 38.3 C (100.9 F) |
| 2000 | 43.3 C (109.9 F) |
| 2001 | 39.4 C (102.9 F) |
| 2002 | 39.4 C (102.9 F) |
| 2003 | 38.9 C (102.0 F) |
| 2004 | 37.8 C (100.0 F) |
| 2005 | 38.9 C (102.0 F) |
| 2006 | 42.2 C (108.0 F) |
| 2007 | 37.8 C (100.0 F) |
| 2008 | 39.4 C (102.9 F) |
| 2009 | 38.3 C (100.9 F) |
| 2010 | 41.1 C (106.0 F) |
| 2011 | 36.7 C (98.1 F) |
| 2012 | 38.3 C (100.9 F) |
| 2013 | 37.2 C (99.0 F) |
| 2014 | 38.3 C (100.9 F) |
| 2015 | 40.6 C (105.1 F) |
| 2016 | 37.2 C (99.0 F) |
| 2017 | 42.2 C (108.0 F) |
| 2018 | 37.2 C (99.0 F) |
| 2019 | 40.0 C (104.0 F) |
| 2020 | 43.9 C (111.0 F) |
| 2021 | 38.9 C (102.0 F) |
| 2022 | 45.6 C (114.1 F) |
| 2023 | 36.1 C (97.0 F) |
| 2024 | 39.4 C (102.9 F) |
| 2025 | 36.7 C (98.1 F) |
| 2026 | 38.9 C (102.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1893 | -0.6 C (30.9 F) |
| 1894 | -1.1 C (30.0 F) |
| 1895 | 0.0 C (32.0 F) |
| 1896 | -2.8 C (27.0 F) |
| 1897 | -2.2 C (28.0 F) |
| 1898 | 0.0 C (32.0 F) |
| 1899 | -3.9 C (25.0 F) |
| 1900 | -1.1 C (30.0 F) |
| 1901 | -1.7 C (28.9 F) |
| 1902 | -2.8 C (27.0 F) |
| 1903 | -3.3 C (26.1 F) |
| 1904 | -1.7 C (28.9 F) |
| 1905 | -2.8 C (27.0 F) |
| 1906 | -2.2 C (28.0 F) |
| 1907 | -1.7 C (28.9 F) |
| 1908 | -2.2 C (28.0 F) |
| 1909 | -1.7 C (28.9 F) |
| 1910 | -2.2 C (28.0 F) |
| 1911 | -1.7 C (28.9 F) |
| 1912 | -2.8 C (27.0 F) |
| 1913 | 1.1 C (34.0 F) |
| 1914 | 0.0 C (32.0 F) |
| 1915 | 1.7 C (35.1 F) |
| 1916 | n/a |
| 1917 | -5.0 C (23.0 F) |
| 1918 | -5.0 C (23.0 F) |
| 1919 | -5.6 C (21.9 F) |
| 1920 | -3.9 C (25.0 F) |
| 1921 | -2.8 C (27.0 F) |
| 1922 | -5.6 C (21.9 F) |
| 1923 | -3.9 C (25.0 F) |
| 1924 | -5.6 C (21.9 F) |
| 1925 | -2.2 C (28.0 F) |
| 1926 | -3.3 C (26.1 F) |
| 1927 | -2.2 C (28.0 F) |
| 1928 | -3.9 C (25.0 F) |
| 1929 | -3.9 C (25.0 F) |
| 1930 | -5.0 C (23.0 F) |
| 1931 | -3.3 C (26.1 F) |
| 1932 | -8.3 C (17.1 F) |
| 1933 | -4.4 C (24.1 F) |
| 1934 | -0.6 C (30.9 F) |
| 1935 | -3.3 C (26.1 F) |
| 1936 | -4.4 C (24.1 F) |
| 1937 | -7.2 C (19.0 F) |
| 1938 | -2.2 C (28.0 F) |
| 1939 | -3.9 C (25.0 F) |
| 1940 | -2.2 C (28.0 F) |
| 1941 | -2.2 C (28.0 F) |
| 1942 | -3.9 C (25.0 F) |
| 1943 | -3.9 C (25.0 F) |
| 1944 | -1.1 C (30.0 F) |
| 1945 | -2.8 C (27.0 F) |
| 1946 | -3.9 C (25.0 F) |
| 1947 | -3.9 C (25.0 F) |
| 1948 | -3.9 C (25.0 F) |
| 1949 | -6.7 C (19.9 F) |
| 1950 | -5.6 C (21.9 F) |
| 1951 | -3.3 C (26.1 F) |
| 1952 | -3.9 C (25.0 F) |
| 1953 | -1.7 C (28.9 F) |
| 1954 | -2.8 C (27.0 F) |
| 1955 | -2.8 C (27.0 F) |
| 1956 | -3.3 C (26.1 F) |
| 1957 | -2.8 C (27.0 F) |
| 1958 | -2.2 C (28.0 F) |
| 1959 | -2.8 C (27.0 F) |
| 1960 | -4.4 C (24.1 F) |
| 1961 | -5.0 C (23.0 F) |
| 1962 | -3.9 C (25.0 F) |
| 1963 | -6.7 C (19.9 F) |
| 1964 | -2.2 C (28.0 F) |
| 1965 | -4.4 C (24.1 F) |
| 1966 | -2.8 C (27.0 F) |
| 1967 | -1.7 C (28.9 F) |
| 1968 | -3.9 C (25.0 F) |
| 1969 | -3.3 C (26.1 F) |
| 1970 | -2.2 C (28.0 F) |
| 1971 | -2.2 C (28.0 F) |
| 1972 | -6.7 C (19.9 F) |
| 1973 | -3.3 C (26.1 F) |
| 1974 | -1.7 C (28.9 F) |
| 1975 | -3.9 C (25.0 F) |
| 1976 | -4.4 C (24.1 F) |
| 1977 | -2.8 C (27.0 F) |
| 1978 | -3.9 C (25.0 F) |
| 1979 | -2.8 C (27.0 F) |
| 1980 | -2.8 C (27.0 F) |
| 1981 | 0.0 C (32.0 F) |
| 1982 | -2.2 C (28.0 F) |
| 1983 | -1.1 C (30.0 F) |
| 1984 | -1.7 C (28.9 F) |
| 1985 | -2.8 C (27.0 F) |
| 1986 | -1.1 C (30.0 F) |
| 1987 | -5.0 C (23.0 F) |
| 1988 | -2.2 C (28.0 F) |
| 1989 | -3.9 C (25.0 F) |
| 1990 | -10.0 C (14.0 F) |
| 1991 | -3.9 C (25.0 F) |
| 1992 | -2.2 C (28.0 F) |
| 1993 | -2.8 C (27.0 F) |
| 1994 | -2.2 C (28.0 F) |
| 1995 | -0.6 C (30.9 F) |
| 1996 | -0.6 C (30.9 F) |
| 1997 | -3.9 C (25.0 F) |
| 1998 | -5.6 C (21.9 F) |
| 1999 | -1.7 C (28.9 F) |
| 2000 | -1.7 C (28.9 F) |
| 2001 | -1.7 C (28.9 F) |
| 2002 | -2.8 C (27.0 F) |
| 2003 | -2.2 C (28.0 F) |
| 2004 | -2.2 C (28.0 F) |
| 2005 | -1.1 C (30.0 F) |
| 2006 | -2.8 C (27.0 F) |
| 2007 | -3.9 C (25.0 F) |
| 2008 | -3.3 C (26.1 F) |
| 2009 | -4.4 C (24.1 F) |
| 2010 | -2.2 C (28.0 F) |
| 2011 | -2.8 C (27.0 F) |
| 2012 | -5.0 C (23.0 F) |
| 2013 | -4.4 C (24.1 F) |
| 2014 | -1.1 C (30.0 F) |
| 2015 | -2.8 C (27.0 F) |
| 2016 | -2.8 C (27.0 F) |
| 2017 | -2.2 C (28.0 F) |
| 2018 | -2.8 C (27.0 F) |
| 2019 | -1.7 C (28.9 F) |
| 2020 | 0.0 C (32.0 F) |
| 2021 | -2.2 C (28.0 F) |
| 2022 | -3.9 C (25.0 F) |
| 2023 | -1.1 C (30.0 F) |
| 2024 | 0.6 C (33.1 F) |
| 2025 | -1.7 C (28.9 F) |
| 2026 | 0.0 C (32.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1893 | 39.4 mm (1.6 in) |
| 1894 | 63.0 mm (2.5 in) |
| 1895 | 52.3 mm (2.1 in) |
| 1896 | 65.8 mm (2.6 in) |
| 1897 | 45.0 mm (1.8 in) |
| 1898 | n/a |
| 1899 | n/a |
| 1900 | 54.9 mm (2.2 in) |
| 1901 | 46.7 mm (1.8 in) |
| 1902 | 80.5 mm (3.2 in) |
| 1903 | 31.2 mm (1.2 in) |
| 1904 | 75.4 mm (3.0 in) |
| 1905 | 26.7 mm (1.1 in) |
| 1906 | 33.5 mm (1.3 in) |
| 1907 | 54.4 mm (2.1 in) |
| 1908 | 24.9 mm (1.0 in) |
| 1909 | 59.4 mm (2.3 in) |
| 1910 | 23.9 mm (0.9 in) |
| 1911 | 79.5 mm (3.1 in) |
| 1912 | 39.9 mm (1.6 in) |
| 1913 | 53.8 mm (2.1 in) |
| 1914 | 69.3 mm (2.7 in) |
| 1915 | 66.0 mm (2.6 in) |
| 1916 | 87.6 mm (3.4 in) |
| 1917 | 43.7 mm (1.7 in) |
| 1918 | 39.9 mm (1.6 in) |
| 1919 | 76.2 mm (3.0 in) |
| 1920 | 40.1 mm (1.6 in) |
| 1921 | 54.1 mm (2.1 in) |
| 1922 | 50.3 mm (2.0 in) |
| 1923 | 31.0 mm (1.2 in) |
| 1924 | 53.3 mm (2.1 in) |
| 1925 | 58.4 mm (2.3 in) |
| 1926 | 49.5 mm (1.9 in) |
| 1927 | 52.3 mm (2.1 in) |
| 1928 | 50.8 mm (2.0 in) |
| 1929 | 44.2 mm (1.7 in) |
| 1930 | 41.1 mm (1.6 in) |
| 1931 | 104.1 mm (4.1 in) |
| 1932 | 48.8 mm (1.9 in) |
| 1933 | 41.9 mm (1.6 in) |
| 1934 | 38.6 mm (1.5 in) |
| 1935 | 45.2 mm (1.8 in) |
| 1936 | 43.9 mm (1.7 in) |
| 1937 | 51.3 mm (2.0 in) |
| 1938 | 41.4 mm (1.6 in) |
| 1939 | 31.2 mm (1.2 in) |
| 1940 | 83.3 mm (3.3 in) |
| 1941 | 54.6 mm (2.1 in) |
| 1942 | 59.7 mm (2.4 in) |
| 1943 | 72.9 mm (2.9 in) |
| 1944 | 34.5 mm (1.4 in) |
| 1945 | 58.4 mm (2.3 in) |
| 1946 | 27.7 mm (1.1 in) |
| 1947 | 47.0 mm (1.9 in) |
| 1948 | 40.6 mm (1.6 in) |
| 1949 | 35.1 mm (1.4 in) |
| 1950 | 48.3 mm (1.9 in) |
| 1951 | 58.4 mm (2.3 in) |
| 1952 | 46.0 mm (1.8 in) |
| 1953 | 48.8 mm (1.9 in) |
| 1954 | 46.0 mm (1.8 in) |
| 1955 | 87.6 mm (3.4 in) |
| 1956 | 41.7 mm (1.6 in) |
| 1957 | 29.2 mm (1.1 in) |
| 1958 | 66.0 mm (2.6 in) |
| 1959 | 54.6 mm (2.1 in) |
| 1960 | 48.0 mm (1.9 in) |
| 1961 | 46.0 mm (1.8 in) |
| 1962 | 118.4 mm (4.7 in) |
| 1963 | 62.7 mm (2.5 in) |
| 1964 | 53.8 mm (2.1 in) |
| 1965 | 32.0 mm (1.3 in) |
| 1966 | 69.9 mm (2.8 in) |
| 1967 | 89.4 mm (3.5 in) |
| 1968 | 48.5 mm (1.9 in) |
| 1969 | 47.8 mm (1.9 in) |
| 1970 | 90.2 mm (3.6 in) |
| 1971 | 26.2 mm (1.0 in) |
| 1972 | 43.2 mm (1.7 in) |
| 1973 | 46.5 mm (1.8 in) |
| 1974 | 40.9 mm (1.6 in) |
| 1975 | 36.1 mm (1.4 in) |
| 1976 | 36.8 mm (1.4 in) |
| 1977 | 148.6 mm (5.9 in) |
| 1978 | 48.3 mm (1.9 in) |
| 1979 | 121.2 mm (4.8 in) |
| 1980 | 61.2 mm (2.4 in) |
| 1981 | 56.4 mm (2.2 in) |
| 1982 | 144.5 mm (5.7 in) |
| 1983 | 87.6 mm (3.4 in) |
| 1984 | 43.4 mm (1.7 in) |
| 1985 | 62.0 mm (2.4 in) |
| 1986 | 77.0 mm (3.0 in) |
| 1987 | 73.7 mm (2.9 in) |
| 1988 | 31.5 mm (1.2 in) |
| 1989 | 43.9 mm (1.7 in) |
| 1990 | 32.8 mm (1.3 in) |
| 1991 | 61.0 mm (2.4 in) |
| 1992 | 61.2 mm (2.4 in) |
| 1993 | 66.0 mm (2.6 in) |
| 1994 | 45.2 mm (1.8 in) |
| 1995 | 87.6 mm (3.4 in) |
| 1996 | 67.6 mm (2.7 in) |
| 1997 | 69.6 mm (2.7 in) |
| 1998 | 71.6 mm (2.8 in) |
| 1999 | 76.2 mm (3.0 in) |
| 2000 | 60.7 mm (2.4 in) |
| 2001 | 48.8 mm (1.9 in) |
| 2002 | 68.6 mm (2.7 in) |
| 2003 | 83.8 mm (3.3 in) |
| 2004 | 65.5 mm (2.6 in) |
| 2005 | 101.1 mm (4.0 in) |
| 2006 | 49.3 mm (1.9 in) |
| 2007 | 25.4 mm (1.0 in) |
| 2008 | 83.1 mm (3.3 in) |
| 2009 | 105.9 mm (4.2 in) |
| 2010 | 59.7 mm (2.4 in) |
| 2011 | 32.8 mm (1.3 in) |
| 2012 | 56.6 mm (2.2 in) |
| 2013 | 25.9 mm (1.0 in) |
| 2014 | 109.2 mm (4.3 in) |
| 2015 | 39.9 mm (1.6 in) |
| 2016 | 65.8 mm (2.6 in) |
| 2017 | 60.7 mm (2.4 in) |
| 2018 | 48.8 mm (1.9 in) |
| 2019 | 55.9 mm (2.2 in) |
| 2020 | 19.8 mm (0.8 in) |
| 2021 | 135.9 mm (5.4 in) |
| 2022 | 69.3 mm (2.7 in) |
| 2023 | 57.7 mm (2.3 in) |
| 2024 | 53.3 mm (2.1 in) |
| 2025 | 71.1 mm (2.8 in) |
| 2026 | 39.9 mm (1.6 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1893 | 89.5 mm (3.5 in) |
| 1894 | 101.7 mm (4.0 in) |
| 1895 | 77.2 mm (3.0 in) |
| 1896 | 129.3 mm (5.1 in) |
| 1897 | 104.0 mm (4.1 in) |
| 1898 | n/a |
| 1899 | n/a |
| 1900 | n/a |
| 1901 | 72.4 mm (2.9 in) |
| 1902 | 166.9 mm (6.6 in) |
| 1903 | 66.5 mm (2.6 in) |
| 1904 | 121.7 mm (4.8 in) |
| 1905 | 47.5 mm (1.9 in) |
| 1906 | 106.4 mm (4.2 in) |
| 1907 | 91.0 mm (3.6 in) |
| 1908 | 57.2 mm (2.3 in) |
| 1909 | 132.9 mm (5.2 in) |
| 1910 | 62.5 mm (2.5 in) |
| 1911 | 168.2 mm (6.6 in) |
| 1912 | 84.7 mm (3.3 in) |
| 1913 | 90.4 mm (3.6 in) |
| 1914 | 138.9 mm (5.5 in) |
| 1915 | 12.7 mm (0.5 in) |
| 1916 | 136.9 mm (5.4 in) |
| 1917 | 121.4 mm (4.8 in) |
| 1918 | 69.3 mm (2.7 in) |
| 1919 | 149.1 mm (5.9 in) |
| 1920 | 67.8 mm (2.7 in) |
| 1921 | 96.1 mm (3.8 in) |
| 1922 | 113.0 mm (4.4 in) |
| 1923 | 73.4 mm (2.9 in) |
| 1924 | 87.6 mm (3.4 in) |
| 1925 | 119.2 mm (4.7 in) |
| 1926 | 142.2 mm (5.6 in) |
| 1927 | 98.1 mm (3.9 in) |
| 1928 | 106.2 mm (4.2 in) |
| 1929 | 82.8 mm (3.3 in) |
| 1930 | 82.5 mm (3.2 in) |
| 1931 | 194.3 mm (7.6 in) |
| 1932 | 71.4 mm (2.8 in) |
| 1933 | 69.1 mm (2.7 in) |
| 1934 | 99.1 mm (3.9 in) |
| 1935 | 74.6 mm (2.9 in) |
| 1936 | 93.9 mm (3.7 in) |
| 1937 | 120.6 mm (4.7 in) |
| 1938 | 127.5 mm (5.0 in) |
| 1939 | 49.6 mm (2.0 in) |
| 1940 | 153.5 mm (6.0 in) |
| 1941 | 108.8 mm (4.3 in) |
| 1942 | 150.2 mm (5.9 in) |
| 1943 | 156.2 mm (6.1 in) |
| 1944 | 93.5 mm (3.7 in) |
| 1945 | 119.1 mm (4.7 in) |
| 1946 | 71.6 mm (2.8 in) |
| 1947 | 77.8 mm (3.1 in) |
| 1948 | 43.8 mm (1.7 in) |
| 1949 | 62.1 mm (2.4 in) |
| 1950 | 139.7 mm (5.5 in) |
| 1951 | 140.0 mm (5.5 in) |
| 1952 | 119.0 mm (4.7 in) |
| 1953 | 63.3 mm (2.5 in) |
| 1954 | 81.0 mm (3.2 in) |
| 1955 | 261.3 mm (10.3 in) |
| 1956 | 89.3 mm (3.5 in) |
| 1957 | 84.4 mm (3.3 in) |
| 1958 | 129.2 mm (5.1 in) |
| 1959 | 135.1 mm (5.3 in) |
| 1960 | 75.2 mm (3.0 in) |
| 1961 | 97.5 mm (3.8 in) |
| 1962 | 263.4 mm (10.4 in) |
| 1963 | 142.0 mm (5.6 in) |
| 1964 | 119.1 mm (4.7 in) |
| 1965 | 106.7 mm (4.2 in) |
| 1966 | 96.9 mm (3.8 in) |
| 1967 | 202.5 mm (8.0 in) |
| 1968 | 102.4 mm (4.0 in) |
| 1969 | 102.2 mm (4.0 in) |
| 1970 | 160.5 mm (6.3 in) |
| 1971 | 60.7 mm (2.4 in) |
| 1972 | 112.3 mm (4.4 in) |
| 1973 | 144.1 mm (5.7 in) |
| 1974 | 79.7 mm (3.1 in) |
| 1975 | 96.0 mm (3.8 in) |
| 1976 | 68.5 mm (2.7 in) |
| 1977 | 184.2 mm (7.3 in) |
| 1978 | 125.3 mm (4.9 in) |
| 1979 | 176.6 mm (7.0 in) |
| 1980 | 165.4 mm (6.5 in) |
| 1981 | 111.5 mm (4.4 in) |
| 1982 | 199.1 mm (7.8 in) |
| 1983 | 156.5 mm (6.2 in) |
| 1984 | 72.1 mm (2.8 in) |
| 1985 | 75.9 mm (3.0 in) |
| 1986 | 253.2 mm (10.0 in) |
| 1987 | 96.1 mm (3.8 in) |
| 1988 | 64.2 mm (2.5 in) |
| 1989 | 57.9 mm (2.3 in) |
| 1990 | 62.5 mm (2.5 in) |
| 1991 | 113.3 mm (4.5 in) |
| 1992 | 121.4 mm (4.8 in) |
| 1993 | 102.3 mm (4.0 in) |
| 1994 | 103.9 mm (4.1 in) |
| 1995 | 183.2 mm (7.2 in) |
| 1996 | 113.5 mm (4.5 in) |
| 1997 | 149.3 mm (5.9 in) |
| 1998 | 146.8 mm (5.8 in) |
| 1999 | 150.9 mm (5.9 in) |
| 2000 | 150.1 mm (5.9 in) |
| 2001 | 136.0 mm (5.4 in) |
| 2002 | 193.6 mm (7.6 in) |
| 2003 | 116.5 mm (4.6 in) |
| 2004 | 121.1 mm (4.8 in) |
| 2005 | 177.8 mm (7.0 in) |
| 2006 | 166.9 mm (6.6 in) |
| 2007 | 66.9 mm (2.6 in) |
| 2008 | 120.6 mm (4.7 in) |
| 2009 | 118.0 mm (4.6 in) |
| 2010 | 158.0 mm (6.2 in) |
| 2011 | 79.6 mm (3.1 in) |
| 2012 | 136.5 mm (5.4 in) |
| 2013 | 37.2 mm (1.5 in) |
| 2014 | 201.1 mm (7.9 in) |
| 2015 | 69.3 mm (2.7 in) |
| 2016 | 109.7 mm (4.3 in) |
| 2017 | 159.2 mm (6.3 in) |
| 2018 | 79.6 mm (3.1 in) |
| 2019 | 115.3 mm (4.5 in) |
| 2020 | 28.1 mm (1.1 in) |
| 2021 | 213.1 mm (8.4 in) |
| 2022 | 144.0 mm (5.7 in) |
| 2023 | 109.0 mm (4.3 in) |
| 2024 | 94.4 mm (3.7 in) |
| 2025 | 124.7 mm (4.9 in) |
| 2026 | 80.0 mm (3.1 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1893 | 114 days |
| 1894 | 26 days |
| 1895 | 48 days |
| 1896 | 31 days |
| 1897 | 8 days |
| 1898 | n/a |
| 1899 | n/a |
| 1900 | 1 day |
| 1901 | 117 days |
| 1902 | 122 days |
| 1903 | 153 days |
| 1904 | 112 days |
| 1905 | 122 days |
| 1906 | 85 days |
| 1907 | 132 days |
| 1908 | 92 days |
| 1909 | 153 days |
| 1910 | 76 days |
| 1911 | 135 days |
| 1912 | 44 days |
| 1913 | 125 days |
| 1914 | 106 days |
| 1915 | 14 days |
| 1916 | 18 days |
| 1917 | 134 days |
| 1918 | 107 days |
| 1919 | 154 days |
| 1920 | 100 days |
| 1921 | 111 days |
| 1922 | 114 days |
| 1923 | 131 days |
| 1924 | 65 days |
| 1925 | 97 days |
| 1926 | 109 days |
| 1927 | 137 days |
| 1928 | 174 days |
| 1929 | 98 days |
| 1930 | 126 days |
| 1931 | 127 days |
| 1932 | 104 days |
| 1933 | 120 days |
| 1934 | 83 days |
| 1935 | 118 days |
| 1936 | 80 days |
| 1937 | 71 days |
| 1938 | 149 days |
| 1939 | 132 days |
| 1940 | 95 days |
| 1941 | 116 days |
| 1942 | 138 days |
| 1943 | 141 days |
| 1944 | 118 days |
| 1945 | 141 days |
| 1946 | 54 days |
| 1947 | 121 days |
| 1948 | 103 days |
| 1949 | 109 days |
| 1950 | 155 days |
| 1951 | 126 days |
| 1952 | 136 days |
| 1953 | 85 days |
| 1954 | 77 days |
| 1955 | 129 days |
| 1956 | 93 days |
| 1957 | 108 days |
| 1958 | 130 days |
| 1959 | 144 days |
| 1960 | 133 days |
| 1961 | 96 days |
| 1962 | 104 days |
| 1963 | 123 days |
| 1964 | 56 days |
| 1965 | 94 days |
| 1966 | 52 days |
| 1967 | 106 days |
| 1968 | 85 days |
| 1969 | 168 days |
| 1970 | 130 days |
| 1971 | 121 days |
| 1972 | 108 days |
| 1973 | 159 days |
| 1974 | 109 days |
| 1975 | 83 days |
| 1976 | 125 days |
| 1977 | 113 days |
| 1978 | 131 days |
| 1979 | 140 days |
| 1980 | 101 days |
| 1981 | 127 days |
| 1982 | 93 days |
| 1983 | 104 days |
| 1984 | 55 days |
| 1985 | 98 days |
| 1986 | 130 days |
| 1987 | 175 days |
| 1988 | 65 days |
| 1989 | 103 days |
| 1990 | 114 days |
| 1991 | 73 days |
| 1992 | 92 days |
| 1993 | 121 days |
| 1994 | 119 days |
| 1995 | 137 days |
| 1996 | 149 days |
| 1997 | 76 days |
| 1998 | 111 days |
| 1999 | 155 days |
| 2000 | 84 days |
| 2001 | 88 days |
| 2002 | 169 days |
| 2003 | 104 days |
| 2004 | 113 days |
| 2005 | 119 days |
| 2006 | 97 days |
| 2007 | 158 days |
| 2008 | 132 days |
| 2009 | 102 days |
| 2010 | 142 days |
| 2011 | 92 days |
| 2012 | 96 days |
| 2013 | 87 days |
| 2014 | 69 days |
| 2015 | 47 days |
| 2016 | 49 days |
| 2017 | 62 days |
| 2018 | 43 days |
| 2019 | 53 days |
| 2020 | 52 days |
| 2021 | 66 days |
| 2022 | 70 days |
| 2023 | 29 days |
| 2024 | 71 days |
| 2025 | 61 days |
| 2026 | 42 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
101 years with a frostAcross 101 years with a frost, the median last spring frost at Napa State Hospital falls on 10 March and the median first autumn frost on 29 November, which leaves a median of 272 days between them.
In 1989 to 2025 the median growing season was 290 days. That is 31 days more than in 1893 to 1939.
Fitted over all years, the growing season changes by +2.6 days per decade at this station.
| Measure | Median, all years | Earliest period (1893 to 1939) | Recent period (1989 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 10 March | 15 March | 15 February | 28 days earlier | -1.8 days per decade |
| First autumn frost | 29 November | 24 November | 5 December | 11 days later | +0.8 days per decade |
| Growing days | 272 days | 259 days | 290 days | 31 days more | +2.6 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
111 years, 1893 to 2025A day with at least 53.9 mm (2.1 in) of rain is expected about once in 2 years. A day with at least 147.7 mm (5.8 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 53.9 mm (2.1 in) | |
| 5 years | 74.9 mm (2.9 in) | |
| 10 years | 90.3 mm (3.6 in) | |
| 25 years | 111.7 mm (4.4 in) | |
| 50 years | 129.1 mm (5.1 in) | |
| 100 years | 147.7 mm (5.8 in) |
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 111 years of values from 1893 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: 148.6 mm (5.9 in) in 1977; 144.5 mm (5.7 in) in 1982; 135.9 mm (5.4 in) in 2021.
Station Changes
2 suspected2 changes were suspected in the annual mean temperature of Napa State Hospital, at 1987 and 1995. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1987 ran 0.6 C (1.0 F) lower than in the years before (likely change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1995 ran 0.3 C (0.6 F) higher than in the years before (possible change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1987 | -0.6 | -1.0 | likely | 5 |
| 1995 | +0.3 | +0.6 | 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, Napa State Hospital had a mean temperature of 15.9 C (60.6 F) and 585.0 mm (23.0 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Ojai (United States, 505 km away), San Jose (United States, 106 km away) and Gilroy (United States, 155 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Ojai | United States | 505 km (314 mi) | 16.4 C (61.5 F) | 524.1 mm (20.6 in) | 1.02 |
| San Jose | United States | 106 km (66 mi) | 15.5 C (60.0 F) | 364.4 mm (14.3 in) | 1.04 |
| Gilroy | United States | 155 km (96 mi) | 15.2 C (59.3 F) | 535.9 mm (21.1 in) | 1.04 |
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).