Imperial Weather Records (USC00044223)
Record envelope, standing records and threshold days for Imperial (USC00044223), California, United States, with 126 years of record.
Key Facts for Imperial
- Imperial (USC00044223) is a weather station in California, United States at 32.85 latitude and -115.57 longitude, -19 m (-64 ft) above sea level.
- The station reports from 1901 to 2026, 126 years of record.
- 1,464 records set at Imperial still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Imperial set a daily record high minimum temperature of 31.7 C (89.1 F) on 30 August 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, 32.85 latitude, -115.57 longitude.
- Elevation: -19 m (-64 ft).
- Period of record: 1901 to 2026, 126 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
33 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 35.6 C (96.1 F) | -8.9 C (16.0 F) | 29.4 C (84.9 F) | 1.7 C (35.1 F) |
| Feb | 36.7 C (98.1 F) | -5.6 C (21.9 F) | 36.7 C (98.1 F) | 6.7 C (44.1 F) |
| Mar | 42.2 C (108.0 F) | -1.1 C (30.0 F) | 42.2 C (108.0 F) | 9.4 C (48.9 F) |
| Apr | 42.8 C (109.0 F) | 1.7 C (35.1 F) | 37.8 C (100.0 F) | 10.0 C (50.0 F) |
| May | 47.8 C (118.0 F) | 6.1 C (43.0 F) | 42.2 C (108.0 F) | 13.3 C (55.9 F) |
| Jun | 50.6 C (123.1 F) | 10.0 C (50.0 F) | 45.6 C (114.1 F) | 19.4 C (66.9 F) |
| Jul | 51.1 C (124.0 F) | 10.6 C (51.1 F) | 47.2 C (117.0 F) | 17.8 C (64.0 F) |
| Aug | 51.1 C (124.0 F) | 15.6 C (60.1 F) | 48.3 C (118.9 F) | 26.7 C (80.1 F) |
| Sep | 48.9 C (120.0 F) | 9.4 C (48.9 F) | n/a | n/a |
| Oct | 45.0 C (113.0 F) | 2.2 C (36.0 F) | n/a | n/a |
| Nov | 36.7 C (98.1 F) | -2.8 C (27.0 F) | n/a | n/a |
| Dec | 32.2 C (90.0 F) | -6.1 C (21.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1901 | 4 |
| 1902 | 50 |
| 1903 | 46 |
| 1904 | 25 |
| 1905 | 30 |
| 1906 | 47 |
| 1907 | 6 |
| 1908 | 15 |
| 1911 | 3 |
| 1925 | 3 |
| 1926 | 6 |
| 1927 | 9 |
| 1928 | 24 |
| 1929 | 18 |
| 1930 | 25 |
| 1931 | 9 |
| 1932 | 11 |
| 1933 | 17 |
| 1934 | 38 |
| 1935 | 8 |
| 1936 | 14 |
| 1937 | 20 |
| 1938 | 9 |
| 1939 | 12 |
| 1940 | 11 |
| 1941 | 14 |
| 1942 | 9 |
| 1943 | 9 |
| 1944 | 15 |
| 1945 | 11 |
| 1946 | 8 |
| 1947 | 10 |
| 1948 | 12 |
| 1949 | 34 |
| 1950 | 18 |
| 1951 | 13 |
| 1952 | 5 |
| 1953 | 7 |
| 1954 | 4 |
| 1955 | 9 |
| 1956 | 10 |
| 1957 | 6 |
| 1958 | 9 |
| 1959 | 8 |
| 1960 | 8 |
| 1961 | 4 |
| 1962 | 15 |
| 1963 | 14 |
| 1964 | 12 |
| 1965 | 10 |
| 1966 | 13 |
| 1967 | 9 |
| 1968 | 6 |
| 1969 | 11 |
| 1970 | 9 |
| 1971 | 25 |
| 1972 | 8 |
| 1973 | 8 |
| 1974 | 6 |
| 1975 | 10 |
| 1976 | 9 |
| 1977 | 5 |
| 1978 | 7 |
| 1979 | 9 |
| 1980 | 16 |
| 1981 | 9 |
| 1982 | 15 |
| 1983 | 11 |
| 1984 | 8 |
| 1985 | 14 |
| 1986 | 7 |
| 1987 | 10 |
| 1988 | 6 |
| 1989 | 8 |
| 1990 | 5 |
| 1991 | 6 |
| 1992 | 3 |
| 1993 | 4 |
| 1994 | 7 |
| 1995 | 11 |
| 1996 | 6 |
| 1997 | 5 |
| 1998 | 5 |
| 1999 | 5 |
| 2000 | 7 |
| 2001 | 10 |
| 2002 | 11 |
| 2003 | 14 |
| 2004 | 5 |
| 2005 | 4 |
| 2006 | 13 |
| 2007 | 7 |
| 2008 | 13 |
| 2009 | 3 |
| 2010 | 7 |
| 2011 | 28 |
| 2012 | 28 |
| 2013 | 17 |
| 2014 | 11 |
| 2015 | 16 |
| 2016 | 12 |
| 2017 | 12 |
| 2018 | 11 |
| 2019 | 5 |
| 2020 | 28 |
| 2021 | 34 |
| 2022 | 22 |
| 2023 | 24 |
| 2024 | 24 |
| 2025 | 26 |
| 2026 | 42 |
All-Time Record Progression
1 new records| Date | Kind | Detail |
|---|---|---|
| 2006-07-22 | Record high minimum temperature | Record high minimum temperature 33.9 C (93.0 F) |
Wettest Day of Each Month
Sep: 103.6 mm (4.1 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 39.4 mm (1.6 in) | 22 January 2024 |
| Feb | 38.1 mm (1.5 in) | 18 February 1905 |
| Mar | 24.1 mm (0.9 in) | 10 March 2020 |
| Apr | 23.1 mm (0.9 in) | 27 April 1931 |
| May | 17.8 mm (0.7 in) | 24 May 1994 |
| Jun | 2.5 mm (0.10 in) | 9 June 2015 |
| Jul | 31.0 mm (1.2 in) | 30 July 2012 |
| Aug | 55.9 mm (2.2 in) | 15 August 1977 |
| Sep | 103.6 mm (4.1 in) | 6 September 1939 |
| Oct | 58.7 mm (2.3 in) | 10 October 1932 |
| Nov | 28.4 mm (1.1 in) | 26 November 1967 |
| Dec | 57.9 mm (2.3 in) | 9 December 1982 |
Period of Record Coverage
1901 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1901 | 61 | 17% | No |
| 1902 | 365 | 100% | Yes |
| 1903 | 335 | 92% | Yes |
| 1904 | 365 | 100% | Yes |
| 1905 | 360 | 99% | Yes |
| 1906 | 361 | 99% | Yes |
| 1907 | 120 | 33% | No |
| 1908 | 241 | 66% | No |
| 1910 | 31 | 8% | No |
| 1911 | 151 | 41% | No |
| 1925 | 91 | 25% | No |
| 1926 | 364 | 100% | Yes |
| 1927 | 361 | 99% | Yes |
| 1928 | 365 | 100% | Yes |
| 1929 | 333 | 91% | Yes |
| 1930 | 365 | 100% | Yes |
| 1931 | 365 | 100% | Yes |
| 1932 | 327 | 89% | No |
| 1933 | 362 | 99% | Yes |
| 1934 | 365 | 100% | Yes |
| 1935 | 365 | 100% | Yes |
| 1936 | 366 | 100% | Yes |
| 1937 | 364 | 100% | Yes |
| 1938 | 365 | 100% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 366 | 100% | Yes |
| 1941 | 365 | 100% | Yes |
| 1942 | 364 | 100% | Yes |
| 1943 | 365 | 100% | Yes |
| 1944 | 365 | 100% | Yes |
| 1945 | 364 | 100% | Yes |
| 1946 | 360 | 99% | Yes |
| 1947 | 356 | 98% | Yes |
| 1948 | 363 | 99% | Yes |
| 1949 | 364 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 364 | 100% | Yes |
| 1954 | 363 | 99% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 358 | 98% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 365 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 364 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 364 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 362 | 99% | Yes |
| 1983 | 363 | 99% | Yes |
| 1984 | 363 | 99% | Yes |
| 1985 | 365 | 100% | Yes |
| 1986 | 365 | 100% | Yes |
| 1987 | 361 | 99% | Yes |
| 1988 | 366 | 100% | Yes |
| 1989 | 365 | 100% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 366 | 100% | Yes |
| 1993 | 365 | 100% | Yes |
| 1994 | 365 | 100% | Yes |
| 1995 | 365 | 100% | Yes |
| 1996 | 366 | 100% | Yes |
| 1997 | 365 | 100% | Yes |
| 1998 | 365 | 100% | Yes |
| 1999 | 365 | 100% | Yes |
| 2000 | 366 | 100% | Yes |
| 2001 | 365 | 100% | Yes |
| 2002 | 365 | 100% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 366 | 100% | Yes |
| 2005 | 365 | 100% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 365 | 100% | Yes |
| 2008 | 366 | 100% | Yes |
| 2009 | 304 | 83% | No |
| 2010 | 334 | 92% | Yes |
| 2011 | 365 | 100% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 364 | 100% | Yes |
| 2015 | 365 | 100% | Yes |
| 2016 | 304 | 83% | No |
| 2017 | 301 | 82% | No |
| 2018 | 365 | 100% | Yes |
| 2019 | 334 | 92% | Yes |
| 2020 | 304 | 83% | No |
| 2021 | 365 | 100% | Yes |
| 2022 | 365 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 363 | 99% | Yes |
| 2026 | 242 | 66% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 30 August 2026 | Imperial, US | daily high min (Provisional) | 31.7 C (89.1 F) | 1.1 C (2.0 F) | 41 years | 25 of 100 (Routine) |
| 26 August 2026 | Imperial, US | daily high max (Provisional) | 48.3 C (118.9 F) | 2.2 C (4.0 F) | 5 years | 19 of 100 (Routine) |
| 24 August 2026 | Imperial, US | daily high min (Provisional) | 31.1 C (88.0 F) | 1.1 C (2.0 F) | 56 years | 30 of 100 (Routine) |
| 22 August 2026 | Imperial, US | daily high max (Provisional) | 46.7 C (116.1 F) | 0.6 C (1.1 F) | 56 years | 29 of 100 (Routine) |
| 19 August 2026 | Imperial, US | all-time high min (Tie, Provisional) | 33.9 C (93.0 F) | tie | 20 years | 9 of 100 (Routine) |
| 18 August 2026 | Imperial, US | daily high min (Tie, Provisional) | 30.6 C (87.1 F) | tie | 12 years | 3 of 100 (Routine) |
| 9 August 2026 | Imperial, US | daily high max (Tie) | 45.0 C (113.0 F) | tie | 85 years | 8 of 100 (Routine) |
| 8 August 2026 | Imperial, US | daily high max (Tie) | 46.1 C (115.0 F) | tie | 85 years | 8 of 100 (Routine) |
| 2 August 2026 | Imperial, US | daily high max | 46.7 C (116.1 F) | 0.6 C (1.1 F) | 56 years | 29 of 100 (Routine) |
| 2 August 2026 | Imperial, US | daily high min (Tie) | 31.1 C (88.0 F) | tie | 92 years | 9 of 100 (Routine) |
| 23 July 2026 | Imperial, US | daily high max | 46.7 C (116.1 F) | 0.6 C (1.1 F) | 1 year | 12 of 100 (Routine) |
| 23 July 2026 | Imperial, US | daily high min (Tie) | 31.1 C (88.0 F) | tie | 4 years | 2 of 100 (Routine) |
| 17 June 2026 | Imperial, US | daily high min | 29.4 C (84.9 F) | 1.1 C (2.0 F) | 19 years | 18 of 100 (Routine) |
| 16 June 2026 | Imperial, US | daily high min | 29.4 C (84.9 F) | 1.6 C (2.9 F) | 19 years | 19 of 100 (Routine) |
| 16 June 2026 | Imperial, US | daily high max (Tie) | 45.6 C (114.1 F) | tie | 0 years | 2 of 100 (Routine) |
| 15 June 2026 | Imperial, US | daily high min (Tie) | 28.3 C (82.9 F) | tie | 85 years | 8 of 100 (Routine) |
| 22 May 2026 | Imperial, US | daily high min (Tie) | 25.6 C (78.1 F) | tie | 24 years | 4 of 100 (Routine) |
| 10 April 2026 | Imperial, US | daily high min | 20.6 C (69.1 F) | 2.3 C (4.1 F) | 65 years | 36 of 100 (Notable) |
| 1 April 2026 | Imperial, US | daily high min | 20.0 C (68.0 F) | 0.6 C (1.1 F) | 36 years | 22 of 100 (Routine) |
| 29 March 2026 | Imperial, US | daily high max | 38.3 C (100.9 F) | 2.2 C (4.0 F) | 55 years | 31 of 100 (Routine) |
Climate Trend
94 complete years, 1902 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1902 | 22.6 C | -0.29 C |
| 1904 | 22.6 C | -0.32 C |
| 1905 | 22.0 C | -0.89 C |
| 1906 | 21.9 C | -0.99 C |
| 1927 | 22.3 C | -0.65 C |
| 1928 | 22.2 C | -0.75 C |
| 1930 | 21.2 C | -1.67 C |
| 1931 | 22.3 C | -0.63 C |
| 1933 | 21.8 C | -1.12 C |
| 1934 | 24.0 C | +1.07 C |
| 1935 | 22.2 C | -0.74 C |
| 1937 | 22.4 C | -0.55 C |
| 1938 | 22.3 C | -0.63 C |
| 1939 | 22.5 C | -0.38 C |
| 1940 | 23.4 C | +0.44 C |
| 1941 | 22.0 C | -0.92 C |
| 1942 | 22.6 C | -0.31 C |
| 1943 | 22.7 C | -0.18 C |
| 1944 | 21.7 C | -1.18 C |
| 1945 | 22.2 C | -0.70 C |
| 1946 | 22.4 C | -0.49 C |
| 1947 | 22.5 C | -0.46 C |
| 1948 | 21.9 C | -1.02 C |
| 1949 | 22.0 C | -0.90 C |
| 1950 | 22.9 C | +0.03 C |
| 1951 | 22.2 C | -0.71 C |
| 1952 | 22.4 C | -0.48 C |
| 1953 | 22.6 C | -0.36 C |
| 1954 | 23.3 C | +0.34 C |
| 1955 | 22.2 C | -0.75 C |
| 1956 | 22.6 C | -0.33 C |
| 1957 | 22.8 C | -0.16 C |
| 1958 | 23.5 C | +0.61 C |
| 1959 | 23.2 C | +0.30 C |
| 1960 | 23.1 C | +0.21 C |
| 1961 | 22.7 C | -0.23 C |
| 1962 | 22.9 C | -0.03 C |
| 1963 | 22.8 C | -0.13 C |
| 1964 | 22.1 C | -0.80 C |
| 1965 | 22.5 C | -0.42 C |
| 1966 | 23.1 C | +0.19 C |
| 1967 | 22.7 C | -0.17 C |
| 1968 | 23.0 C | +0.12 C |
| 1969 | 23.3 C | +0.38 C |
| 1970 | 22.8 C | -0.09 C |
| 1971 | 22.0 C | -0.87 C |
| 1972 | 22.8 C | -0.12 C |
| 1973 | 22.6 C | -0.27 C |
| 1974 | 23.1 C | +0.19 C |
| 1975 | 22.2 C | -0.69 C |
| 1976 | 22.7 C | -0.22 C |
| 1977 | 23.3 C | +0.43 C |
| 1978 | 23.4 C | +0.52 C |
| 1979 | 23.1 C | +0.16 C |
| 1980 | 23.6 C | +0.70 C |
| 1981 | 24.1 C | +1.16 C |
| 1982 | 22.5 C | -0.41 C |
| 1983 | 23.3 C | +0.39 C |
| 1984 | 23.4 C | +0.48 C |
| 1985 | 22.8 C | -0.09 C |
| 1986 | 23.8 C | +0.89 C |
| 1987 | 23.3 C | +0.35 C |
| 1988 | 23.2 C | +0.29 C |
| 1989 | 23.4 C | +0.48 C |
| 1990 | 22.7 C | -0.17 C |
| 1991 | 22.6 C | -0.28 C |
| 1992 | 22.9 C | -0.02 C |
| 1993 | 22.9 C | -0.06 C |
| 1994 | 22.7 C | -0.17 C |
| 1995 | 23.3 C | +0.38 C |
| 1996 | 23.3 C | +0.36 C |
| 1997 | 22.8 C | -0.07 C |
| 1998 | 21.8 C | -1.09 C |
| 1999 | 22.4 C | -0.50 C |
| 2000 | 23.5 C | +0.61 C |
| 2001 | 23.8 C | +0.91 C |
| 2002 | 23.4 C | +0.50 C |
| 2003 | 24.1 C | +1.14 C |
| 2004 | 23.3 C | +0.40 C |
| 2005 | 23.2 C | +0.33 C |
| 2006 | 23.7 C | +0.81 C |
| 2007 | 23.3 C | +0.43 C |
| 2008 | 22.5 C | -0.43 C |
| 2011 | 21.7 C | -1.20 C |
| 2012 | 21.6 C | -1.29 C |
| 2013 | 23.4 C | +0.47 C |
| 2014 | 24.7 C | +1.83 C |
| 2015 | 24.5 C | +1.56 C |
| 2018 | 23.5 C | +0.55 C |
| 2021 | 25.1 C | +2.20 C |
| 2022 | 24.8 C | +1.84 C |
| 2023 | 23.9 C | +0.94 C |
| 2024 | 24.9 C | +1.96 C |
| 2025 | 24.7 C | +1.77 C |
The annual mean temperature here has risen by 0.2 C (0.1 to 0.2) per decade over 1902 to 2025. In Fahrenheit: 0.3 F (0.2 to 0.4) per decade. The slope is a straight line fitted to 94 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.2 C (0.1 to 0.2) per decade | 0.3 F (0.2 to 0.4) per decade | 1902 to 2025 | 94 | Rise |
| Mean daily maximum | 0.04 C (0.00 to 0.09) per decade | 0.08 F (-0.01 to 0.17) per decade | 1902 to 2025 | 94 | Not clearly different from zero |
| Mean daily minimum | 0.3 C (0.2 to 0.3) per decade | 0.5 F (0.4 to 0.6) per decade | 1902 to 2025 | 94 | 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
1901 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 51.1 C (124.0 F) | 1903 | 46.7 C (116.1 F) | 112 |
| Coldest night (TNn) | -8.9 C (16.0 F) | 1937 | -1.1 C (30.0 F) | 112 |
| Wettest day (Rx1day) | 103.6 mm (4.1 in) | 1939 | 19.0 mm (0.7 in) | 112 |
| Wettest five days (Rx5day) | 98.3 mm (3.9 in) | 1977 | 23.0 mm (0.9 in) | 110 |
| Longest dry spell (CDD) | 335 days | 1956 | 154 days | 112 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1901 | 33.3 C (91.9 F) |
| 1902 | 50.6 C (123.1 F) |
| 1903 | 51.1 C (124.0 F) |
| 1904 | 46.1 C (115.0 F) |
| 1905 | 51.1 C (124.0 F) |
| 1906 | 47.2 C (117.0 F) |
| 1907 | 35.6 C (96.1 F) |
| 1908 | 46.7 C (116.1 F) |
| 1910 | 27.2 C (81.0 F) |
| 1911 | 40.0 C (104.0 F) |
| 1925 | 38.3 C (100.9 F) |
| 1926 | 45.0 C (113.0 F) |
| 1927 | 46.1 C (115.0 F) |
| 1928 | 46.1 C (115.0 F) |
| 1929 | 47.2 C (117.0 F) |
| 1930 | 44.4 C (111.9 F) |
| 1931 | 46.7 C (116.1 F) |
| 1932 | 45.6 C (114.1 F) |
| 1933 | 47.8 C (118.0 F) |
| 1934 | 47.8 C (118.0 F) |
| 1935 | 46.1 C (115.0 F) |
| 1936 | 48.3 C (118.9 F) |
| 1937 | 47.2 C (117.0 F) |
| 1938 | 46.1 C (115.0 F) |
| 1939 | 47.8 C (118.0 F) |
| 1940 | 47.8 C (118.0 F) |
| 1941 | 45.6 C (114.1 F) |
| 1942 | 47.8 C (118.0 F) |
| 1943 | 48.3 C (118.9 F) |
| 1944 | 46.1 C (115.0 F) |
| 1945 | 45.6 C (114.1 F) |
| 1946 | 45.0 C (113.0 F) |
| 1947 | 46.7 C (116.1 F) |
| 1948 | 47.8 C (118.0 F) |
| 1949 | 46.1 C (115.0 F) |
| 1950 | 47.8 C (118.0 F) |
| 1951 | 45.0 C (113.0 F) |
| 1952 | 44.4 C (111.9 F) |
| 1953 | 45.6 C (114.1 F) |
| 1954 | 46.7 C (116.1 F) |
| 1955 | 45.0 C (113.0 F) |
| 1956 | 45.0 C (113.0 F) |
| 1957 | 47.2 C (117.0 F) |
| 1958 | 47.2 C (117.0 F) |
| 1959 | 46.7 C (116.1 F) |
| 1960 | 46.1 C (115.0 F) |
| 1961 | 46.7 C (116.1 F) |
| 1962 | 45.0 C (113.0 F) |
| 1963 | 45.6 C (114.1 F) |
| 1964 | 46.7 C (116.1 F) |
| 1965 | 45.0 C (113.0 F) |
| 1966 | 46.1 C (115.0 F) |
| 1967 | 45.0 C (113.0 F) |
| 1968 | 46.1 C (115.0 F) |
| 1969 | 47.2 C (117.0 F) |
| 1970 | 48.3 C (118.9 F) |
| 1971 | 46.1 C (115.0 F) |
| 1972 | 46.7 C (116.1 F) |
| 1973 | 47.2 C (117.0 F) |
| 1974 | 46.7 C (116.1 F) |
| 1975 | 46.1 C (115.0 F) |
| 1976 | 46.1 C (115.0 F) |
| 1977 | 46.1 C (115.0 F) |
| 1978 | 46.7 C (116.1 F) |
| 1979 | 46.1 C (115.0 F) |
| 1980 | 46.7 C (116.1 F) |
| 1981 | 46.7 C (116.1 F) |
| 1982 | 46.7 C (116.1 F) |
| 1983 | 45.6 C (114.1 F) |
| 1984 | 46.7 C (116.1 F) |
| 1985 | 47.2 C (117.0 F) |
| 1986 | 46.1 C (115.0 F) |
| 1987 | 46.1 C (115.0 F) |
| 1988 | 43.9 C (111.0 F) |
| 1989 | 45.6 C (114.1 F) |
| 1990 | 47.2 C (117.0 F) |
| 1991 | 44.4 C (111.9 F) |
| 1992 | 45.6 C (114.1 F) |
| 1993 | 47.8 C (118.0 F) |
| 1994 | 46.1 C (115.0 F) |
| 1995 | 49.4 C (120.9 F) |
| 1996 | 46.1 C (115.0 F) |
| 1997 | 45.6 C (114.1 F) |
| 1998 | 46.7 C (116.1 F) |
| 1999 | 43.9 C (111.0 F) |
| 2000 | 45.0 C (113.0 F) |
| 2001 | 46.1 C (115.0 F) |
| 2002 | 45.0 C (113.0 F) |
| 2003 | 46.7 C (116.1 F) |
| 2004 | 45.0 C (113.0 F) |
| 2005 | 48.3 C (118.9 F) |
| 2006 | 47.2 C (117.0 F) |
| 2007 | 46.1 C (115.0 F) |
| 2008 | 46.7 C (116.1 F) |
| 2009 | 46.7 C (116.1 F) |
| 2010 | 46.7 C (116.1 F) |
| 2011 | 46.1 C (115.0 F) |
| 2012 | 46.7 C (116.1 F) |
| 2013 | 48.3 C (118.9 F) |
| 2014 | 46.1 C (115.0 F) |
| 2015 | 47.8 C (118.0 F) |
| 2016 | 47.8 C (118.0 F) |
| 2017 | 49.4 C (120.9 F) |
| 2018 | 46.1 C (115.0 F) |
| 2019 | 46.1 C (115.0 F) |
| 2020 | 48.9 C (120.0 F) |
| 2021 | 48.9 C (120.0 F) |
| 2022 | 46.7 C (116.1 F) |
| 2023 | 48.3 C (118.9 F) |
| 2024 | 48.3 C (118.9 F) |
| 2025 | 47.8 C (118.0 F) |
| 2026 | 48.3 C (118.9 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1901 | -4.4 C (24.1 F) |
| 1902 | -4.4 C (24.1 F) |
| 1903 | -3.3 C (26.1 F) |
| 1904 | -2.2 C (28.0 F) |
| 1905 | -5.6 C (21.9 F) |
| 1906 | -4.4 C (24.1 F) |
| 1907 | -3.3 C (26.1 F) |
| 1908 | -1.1 C (30.0 F) |
| 1910 | 3.3 C (37.9 F) |
| 1911 | -0.6 C (30.9 F) |
| 1925 | -0.6 C (30.9 F) |
| 1926 | -2.8 C (27.0 F) |
| 1927 | -0.6 C (30.9 F) |
| 1928 | -1.7 C (28.9 F) |
| 1929 | -4.4 C (24.1 F) |
| 1930 | -3.3 C (26.1 F) |
| 1931 | -2.8 C (27.0 F) |
| 1932 | -2.2 C (28.0 F) |
| 1933 | -5.0 C (23.0 F) |
| 1934 | -1.1 C (30.0 F) |
| 1935 | -1.7 C (28.9 F) |
| 1936 | -0.6 C (30.9 F) |
| 1937 | -8.9 C (16.0 F) |
| 1938 | -1.7 C (28.9 F) |
| 1939 | 0.0 C (32.0 F) |
| 1940 | -1.1 C (30.0 F) |
| 1941 | -1.1 C (30.0 F) |
| 1942 | -2.8 C (27.0 F) |
| 1943 | -3.9 C (25.0 F) |
| 1944 | -0.6 C (30.9 F) |
| 1945 | -0.6 C (30.9 F) |
| 1946 | -0.6 C (30.9 F) |
| 1947 | -2.2 C (28.0 F) |
| 1948 | -3.9 C (25.0 F) |
| 1949 | -6.1 C (21.0 F) |
| 1950 | -6.1 C (21.0 F) |
| 1951 | -1.1 C (30.0 F) |
| 1952 | -3.3 C (26.1 F) |
| 1953 | -3.3 C (26.1 F) |
| 1954 | -2.8 C (27.0 F) |
| 1955 | -1.7 C (28.9 F) |
| 1956 | -1.7 C (28.9 F) |
| 1957 | -1.1 C (30.0 F) |
| 1958 | 0.0 C (32.0 F) |
| 1959 | 0.6 C (33.1 F) |
| 1960 | -2.8 C (27.0 F) |
| 1961 | 0.6 C (33.1 F) |
| 1962 | -3.9 C (25.0 F) |
| 1963 | -4.4 C (24.1 F) |
| 1964 | -1.1 C (30.0 F) |
| 1965 | -0.6 C (30.9 F) |
| 1966 | -1.1 C (30.0 F) |
| 1967 | -1.1 C (30.0 F) |
| 1968 | -2.8 C (27.0 F) |
| 1969 | 0.6 C (33.1 F) |
| 1970 | -1.7 C (28.9 F) |
| 1971 | -5.0 C (23.0 F) |
| 1972 | -4.4 C (24.1 F) |
| 1973 | -1.1 C (30.0 F) |
| 1974 | -2.2 C (28.0 F) |
| 1975 | -0.6 C (30.9 F) |
| 1976 | -1.7 C (28.9 F) |
| 1977 | 0.6 C (33.1 F) |
| 1978 | -1.7 C (28.9 F) |
| 1979 | -0.6 C (30.9 F) |
| 1980 | 3.3 C (37.9 F) |
| 1981 | 2.2 C (36.0 F) |
| 1982 | 0.6 C (33.1 F) |
| 1983 | 1.7 C (35.1 F) |
| 1984 | 1.1 C (34.0 F) |
| 1985 | -2.2 C (28.0 F) |
| 1986 | 0.6 C (33.1 F) |
| 1987 | -2.2 C (28.0 F) |
| 1988 | -1.1 C (30.0 F) |
| 1989 | -1.1 C (30.0 F) |
| 1990 | -6.1 C (21.0 F) |
| 1991 | -0.6 C (30.9 F) |
| 1992 | -0.6 C (30.9 F) |
| 1993 | -1.7 C (28.9 F) |
| 1994 | -0.6 C (30.9 F) |
| 1995 | 2.8 C (37.0 F) |
| 1996 | -1.1 C (30.0 F) |
| 1997 | 0.0 C (32.0 F) |
| 1998 | -2.2 C (28.0 F) |
| 1999 | 2.2 C (36.0 F) |
| 2000 | 1.7 C (35.1 F) |
| 2001 | 1.7 C (35.1 F) |
| 2002 | 0.0 C (32.0 F) |
| 2003 | -0.6 C (30.9 F) |
| 2004 | 0.6 C (33.1 F) |
| 2005 | 1.1 C (34.0 F) |
| 2006 | 0.0 C (32.0 F) |
| 2007 | -3.9 C (25.0 F) |
| 2008 | -0.6 C (30.9 F) |
| 2009 | 0.0 C (32.0 F) |
| 2010 | -1.1 C (30.0 F) |
| 2011 | -5.0 C (23.0 F) |
| 2012 | -3.9 C (25.0 F) |
| 2013 | -5.0 C (23.0 F) |
| 2014 | 0.0 C (32.0 F) |
| 2015 | -2.2 C (28.0 F) |
| 2016 | 0.0 C (32.0 F) |
| 2017 | 2.2 C (36.0 F) |
| 2018 | 2.2 C (36.0 F) |
| 2019 | -1.1 C (30.0 F) |
| 2020 | -0.6 C (30.9 F) |
| 2021 | 2.2 C (36.0 F) |
| 2022 | 0.0 C (32.0 F) |
| 2023 | 1.7 C (35.1 F) |
| 2024 | 0.6 C (33.1 F) |
| 2025 | 1.1 C (34.0 F) |
| 2026 | 1.7 C (35.1 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1901 | 0.0 mm (0.00 in) |
| 1902 | 44.5 mm (1.8 in) |
| 1903 | 6.4 mm (0.25 in) |
| 1904 | 12.2 mm (0.5 in) |
| 1905 | 38.1 mm (1.5 in) |
| 1906 | 30.5 mm (1.2 in) |
| 1907 | 11.4 mm (0.4 in) |
| 1908 | 7.6 mm (0.30 in) |
| 1910 | 0.0 mm (0.00 in) |
| 1911 | 0.0 mm (0.00 in) |
| 1925 | 39.4 mm (1.6 in) |
| 1926 | 46.2 mm (1.8 in) |
| 1927 | 32.0 mm (1.3 in) |
| 1928 | 3.6 mm (0.14 in) |
| 1929 | 22.4 mm (0.9 in) |
| 1930 | 18.5 mm (0.7 in) |
| 1931 | 25.7 mm (1.0 in) |
| 1932 | 58.7 mm (2.3 in) |
| 1933 | 17.5 mm (0.7 in) |
| 1934 | 5.1 mm (0.20 in) |
| 1935 | 25.1 mm (1.0 in) |
| 1936 | 7.9 mm (0.31 in) |
| 1937 | 13.7 mm (0.5 in) |
| 1938 | 25.4 mm (1.0 in) |
| 1939 | 103.6 mm (4.1 in) |
| 1940 | 26.7 mm (1.1 in) |
| 1941 | 27.9 mm (1.1 in) |
| 1942 | 14.0 mm (0.6 in) |
| 1943 | 32.3 mm (1.3 in) |
| 1944 | 18.3 mm (0.7 in) |
| 1945 | 16.0 mm (0.6 in) |
| 1946 | 53.6 mm (2.1 in) |
| 1947 | 2.3 mm (0.09 in) |
| 1948 | 19.6 mm (0.8 in) |
| 1949 | 13.7 mm (0.5 in) |
| 1950 | 2.8 mm (0.11 in) |
| 1951 | 29.2 mm (1.1 in) |
| 1952 | 16.0 mm (0.6 in) |
| 1953 | 4.6 mm (0.18 in) |
| 1954 | 5.3 mm (0.21 in) |
| 1955 | 11.2 mm (0.4 in) |
| 1956 | 3.3 mm (0.13 in) |
| 1957 | 29.0 mm (1.1 in) |
| 1958 | 21.3 mm (0.8 in) |
| 1959 | 12.7 mm (0.5 in) |
| 1960 | 13.5 mm (0.5 in) |
| 1961 | 18.5 mm (0.7 in) |
| 1962 | 18.8 mm (0.7 in) |
| 1963 | 14.0 mm (0.6 in) |
| 1964 | 9.7 mm (0.38 in) |
| 1965 | 26.9 mm (1.1 in) |
| 1966 | 12.2 mm (0.5 in) |
| 1967 | 29.0 mm (1.1 in) |
| 1968 | 29.7 mm (1.2 in) |
| 1969 | 20.8 mm (0.8 in) |
| 1970 | 15.5 mm (0.6 in) |
| 1971 | 11.2 mm (0.4 in) |
| 1972 | 36.6 mm (1.4 in) |
| 1973 | 6.9 mm (0.27 in) |
| 1974 | 14.7 mm (0.6 in) |
| 1975 | 11.9 mm (0.5 in) |
| 1976 | 59.7 mm (2.4 in) |
| 1977 | 55.9 mm (2.2 in) |
| 1978 | 16.3 mm (0.6 in) |
| 1979 | 10.7 mm (0.4 in) |
| 1980 | 19.3 mm (0.8 in) |
| 1981 | 20.3 mm (0.8 in) |
| 1982 | 57.9 mm (2.3 in) |
| 1983 | 23.4 mm (0.9 in) |
| 1984 | 17.8 mm (0.7 in) |
| 1985 | 25.9 mm (1.0 in) |
| 1986 | 49.8 mm (2.0 in) |
| 1987 | 10.7 mm (0.4 in) |
| 1988 | 22.9 mm (0.9 in) |
| 1989 | 10.2 mm (0.4 in) |
| 1990 | 13.2 mm (0.5 in) |
| 1991 | 22.9 mm (0.9 in) |
| 1992 | 23.1 mm (0.9 in) |
| 1993 | 22.9 mm (0.9 in) |
| 1994 | 17.8 mm (0.7 in) |
| 1995 | 16.8 mm (0.7 in) |
| 1996 | 14.5 mm (0.6 in) |
| 1997 | 33.5 mm (1.3 in) |
| 1998 | 24.9 mm (1.0 in) |
| 1999 | 17.0 mm (0.7 in) |
| 2000 | 7.4 mm (0.29 in) |
| 2001 | 8.9 mm (0.35 in) |
| 2002 | 8.6 mm (0.34 in) |
| 2003 | 21.6 mm (0.9 in) |
| 2004 | 31.8 mm (1.3 in) |
| 2005 | 19.1 mm (0.8 in) |
| 2006 | 8.6 mm (0.34 in) |
| 2007 | 20.1 mm (0.8 in) |
| 2008 | 27.7 mm (1.1 in) |
| 2009 | 8.4 mm (0.33 in) |
| 2010 | 31.5 mm (1.2 in) |
| 2011 | 15.5 mm (0.6 in) |
| 2012 | 31.0 mm (1.2 in) |
| 2013 | 25.7 mm (1.0 in) |
| 2014 | 33.5 mm (1.3 in) |
| 2015 | 17.3 mm (0.7 in) |
| 2016 | 15.2 mm (0.6 in) |
| 2017 | 53.3 mm (2.1 in) |
| 2018 | 17.3 mm (0.7 in) |
| 2019 | 19.8 mm (0.8 in) |
| 2020 | 24.1 mm (0.9 in) |
| 2021 | 21.8 mm (0.9 in) |
| 2022 | 27.4 mm (1.1 in) |
| 2023 | 19.3 mm (0.8 in) |
| 2024 | 39.4 mm (1.6 in) |
| 2025 | 19.6 mm (0.8 in) |
| 2026 | 3.3 mm (0.13 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1901 | n/a |
| 1902 | 19.1 mm (0.8 in) |
| 1903 | 6.4 mm (0.25 in) |
| 1904 | 12.2 mm (0.5 in) |
| 1905 | 66.1 mm (2.6 in) |
| 1906 | 43.2 mm (1.7 in) |
| 1907 | 11.4 mm (0.4 in) |
| 1908 | 12.7 mm (0.5 in) |
| 1910 | 0.0 mm (0.00 in) |
| 1911 | n/a |
| 1925 | 41.2 mm (1.6 in) |
| 1926 | 76.0 mm (3.0 in) |
| 1927 | 59.9 mm (2.4 in) |
| 1928 | 3.6 mm (0.14 in) |
| 1929 | 22.4 mm (0.9 in) |
| 1930 | 18.5 mm (0.7 in) |
| 1931 | 39.7 mm (1.6 in) |
| 1932 | 72.6 mm (2.9 in) |
| 1933 | 20.0 mm (0.8 in) |
| 1934 | 1.3 mm (0.05 in) |
| 1935 | 49.5 mm (1.9 in) |
| 1936 | 12.7 mm (0.5 in) |
| 1937 | 15.0 mm (0.6 in) |
| 1938 | 36.9 mm (1.5 in) |
| 1939 | 6.7 mm (0.26 in) |
| 1940 | 38.1 mm (1.5 in) |
| 1941 | 34.0 mm (1.3 in) |
| 1942 | 14.0 mm (0.6 in) |
| 1943 | 48.5 mm (1.9 in) |
| 1944 | 29.3 mm (1.2 in) |
| 1945 | 34.8 mm (1.4 in) |
| 1946 | 53.6 mm (2.1 in) |
| 1947 | 3.1 mm (0.12 in) |
| 1948 | 20.6 mm (0.8 in) |
| 1949 | 25.9 mm (1.0 in) |
| 1950 | 3.8 mm (0.15 in) |
| 1951 | 45.5 mm (1.8 in) |
| 1952 | 16.0 mm (0.6 in) |
| 1953 | 4.6 mm (0.18 in) |
| 1954 | 8.1 mm (0.32 in) |
| 1955 | 24.2 mm (1.0 in) |
| 1956 | 3.3 mm (0.13 in) |
| 1957 | 37.4 mm (1.5 in) |
| 1958 | 21.8 mm (0.9 in) |
| 1959 | 17.3 mm (0.7 in) |
| 1960 | 13.5 mm (0.5 in) |
| 1961 | 20.8 mm (0.8 in) |
| 1962 | 19.8 mm (0.8 in) |
| 1963 | 26.4 mm (1.0 in) |
| 1964 | 9.7 mm (0.38 in) |
| 1965 | 27.4 mm (1.1 in) |
| 1966 | 12.2 mm (0.5 in) |
| 1967 | 35.8 mm (1.4 in) |
| 1968 | 29.7 mm (1.2 in) |
| 1969 | 37.8 mm (1.5 in) |
| 1970 | 21.1 mm (0.8 in) |
| 1971 | 11.2 mm (0.4 in) |
| 1972 | 36.6 mm (1.4 in) |
| 1973 | 7.6 mm (0.30 in) |
| 1974 | 28.1 mm (1.1 in) |
| 1975 | 11.9 mm (0.5 in) |
| 1976 | 68.6 mm (2.7 in) |
| 1977 | 98.3 mm (3.9 in) |
| 1978 | 18.6 mm (0.7 in) |
| 1979 | 18.3 mm (0.7 in) |
| 1980 | 26.2 mm (1.0 in) |
| 1981 | 22.3 mm (0.9 in) |
| 1982 | 60.7 mm (2.4 in) |
| 1983 | 39.1 mm (1.5 in) |
| 1984 | 21.6 mm (0.9 in) |
| 1985 | 25.9 mm (1.0 in) |
| 1986 | 65.8 mm (2.6 in) |
| 1987 | 28.3 mm (1.1 in) |
| 1988 | 22.9 mm (0.9 in) |
| 1989 | 15.8 mm (0.6 in) |
| 1990 | 16.8 mm (0.7 in) |
| 1991 | 27.8 mm (1.1 in) |
| 1992 | 23.1 mm (0.9 in) |
| 1993 | 46.8 mm (1.8 in) |
| 1994 | 18.3 mm (0.7 in) |
| 1995 | 20.3 mm (0.8 in) |
| 1996 | 14.5 mm (0.6 in) |
| 1997 | 39.9 mm (1.6 in) |
| 1998 | 24.9 mm (1.0 in) |
| 1999 | 17.0 mm (0.7 in) |
| 2000 | 7.4 mm (0.29 in) |
| 2001 | 17.0 mm (0.7 in) |
| 2002 | 10.6 mm (0.4 in) |
| 2003 | 25.2 mm (1.0 in) |
| 2004 | 34.8 mm (1.4 in) |
| 2005 | 20.1 mm (0.8 in) |
| 2006 | 9.1 mm (0.36 in) |
| 2007 | 20.1 mm (0.8 in) |
| 2008 | 28.0 mm (1.1 in) |
| 2009 | 8.4 mm (0.33 in) |
| 2010 | 61.0 mm (2.4 in) |
| 2011 | 27.2 mm (1.1 in) |
| 2012 | 33.5 mm (1.3 in) |
| 2013 | 25.7 mm (1.0 in) |
| 2014 | 33.8 mm (1.3 in) |
| 2015 | 17.3 mm (0.7 in) |
| 2016 | 22.3 mm (0.9 in) |
| 2017 | 53.3 mm (2.1 in) |
| 2018 | 30.2 mm (1.2 in) |
| 2019 | 25.2 mm (1.0 in) |
| 2020 | 35.9 mm (1.4 in) |
| 2021 | 30.0 mm (1.2 in) |
| 2022 | 27.9 mm (1.1 in) |
| 2023 | 30.3 mm (1.2 in) |
| 2024 | 40.7 mm (1.6 in) |
| 2025 | 20.7 mm (0.8 in) |
| 2026 | 5.1 mm (0.20 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1901 | 1 day |
| 1902 | 119 days |
| 1903 | 234 days |
| 1904 | 108 days |
| 1905 | 98 days |
| 1906 | 96 days |
| 1907 | 30 days |
| 1908 | 180 days |
| 1910 | 31 days |
| 1911 | 2 days |
| 1925 | 48 days |
| 1926 | 55 days |
| 1927 | 234 days |
| 1928 | 61 days |
| 1929 | 222 days |
| 1930 | 89 days |
| 1931 | 46 days |
| 1932 | 231 days |
| 1933 | 97 days |
| 1934 | 73 days |
| 1935 | 133 days |
| 1936 | 84 days |
| 1937 | 83 days |
| 1938 | 93 days |
| 1939 | 130 days |
| 1940 | 122 days |
| 1941 | 26 days |
| 1942 | 128 days |
| 1943 | 163 days |
| 1944 | 179 days |
| 1945 | 154 days |
| 1946 | 222 days |
| 1947 | 146 days |
| 1948 | 136 days |
| 1949 | 242 days |
| 1950 | 127 days |
| 1951 | 93 days |
| 1952 | 108 days |
| 1953 | 304 days |
| 1954 | 171 days |
| 1955 | 134 days |
| 1956 | 335 days |
| 1957 | 152 days |
| 1958 | 235 days |
| 1959 | 193 days |
| 1960 | 160 days |
| 1961 | 183 days |
| 1962 | 272 days |
| 1963 | 149 days |
| 1964 | 241 days |
| 1965 | 221 days |
| 1966 | 176 days |
| 1967 | 138 days |
| 1968 | 156 days |
| 1969 | 196 days |
| 1970 | 290 days |
| 1971 | 117 days |
| 1972 | 279 days |
| 1973 | 158 days |
| 1974 | 200 days |
| 1975 | 108 days |
| 1976 | 101 days |
| 1977 | 142 days |
| 1978 | 105 days |
| 1979 | 137 days |
| 1980 | 246 days |
| 1981 | 104 days |
| 1982 | 164 days |
| 1983 | 134 days |
| 1984 | 197 days |
| 1985 | 186 days |
| 1986 | 133 days |
| 1987 | 160 days |
| 1988 | 90 days |
| 1989 | 215 days |
| 1990 | 110 days |
| 1991 | 125 days |
| 1992 | 170 days |
| 1993 | 232 days |
| 1994 | 170 days |
| 1995 | 248 days |
| 1996 | 157 days |
| 1997 | 112 days |
| 1998 | 136 days |
| 1999 | 99 days |
| 2000 | 155 days |
| 2001 | 299 days |
| 2002 | 248 days |
| 2003 | 160 days |
| 2004 | 200 days |
| 2005 | 148 days |
| 2006 | 208 days |
| 2007 | 105 days |
| 2008 | 166 days |
| 2009 | 159 days |
| 2010 | 85 days |
| 2011 | 205 days |
| 2012 | 94 days |
| 2013 | 165 days |
| 2014 | 213 days |
| 2015 | 161 days |
| 2016 | 142 days |
| 2017 | 91 days |
| 2018 | 181 days |
| 2019 | 116 days |
| 2020 | 153 days |
| 2021 | 217 days |
| 2022 | 164 days |
| 2023 | 150 days |
| 2024 | 275 days |
| 2025 | 164 days |
| 2026 | 155 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
36 years with a frostAcross 36 years with a frost, the median last spring frost at Imperial falls on 1 February and the median first autumn frost on 14 December, which leaves a median of 309 days between them.
Fitted over all years, the growing season changes by +1.3 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1930 to 2015) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 1 February | n/a | 2 February | n/a | 0.0 days per decade |
| First autumn frost | 14 December | n/a | 15 December | n/a | +1.2 days per decade |
| Growing days | 309 days | n/a | 310 days | n/a | +1.3 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
91 years, 1902 to 2025A day with at least 19.0 mm (0.7 in) of rain is expected about once in 2 years. A day with at least 65.5 mm (2.6 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 19.0 mm (0.7 in) | |
| 5 years | 30.1 mm (1.2 in) | |
| 10 years | 38.0 mm (1.5 in) | |
| 25 years | 48.5 mm (1.9 in) | |
| 50 years | 56.9 mm (2.2 in) | |
| 100 years | 65.5 mm (2.6 in) | Longer than the 91 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, 91 years of values from 1902 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: 59.7 mm (2.4 in) in 1976; 58.7 mm (2.3 in) in 1932; 57.9 mm (2.3 in) in 1982.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Imperial, at 1994. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1994 ran 0.6 C (1.0 F) lower than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1994 | -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
2005 to 2025 against 1961 to 1990Over 2005 to 2025, Imperial had a mean temperature of 23.7 C (74.7 F) and 59.1 mm (2.3 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Indio Fire STN (United States, 113 km away), Yuma Proving Ground (United States, 110 km away) and Eagle Mtn (United States, 107 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Indio Fire STN | United States | 113 km (70 mi) | 23.1 C (73.5 F) | 79.9 mm (3.1 in) | 0.70 |
| Yuma Proving Ground | United States | 110 km (68 mi) | 23.0 C (73.5 F) | 92.3 mm (3.6 in) | 0.74 |
| Eagle Mtn | United States | 107 km (66 mi) | 23.0 C (73.4 F) | 89.9 mm (3.5 in) | 0.85 |
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).