Hetch Hetchy Weather Records (USC00043939)
Record envelope, standing records and threshold days for Hetch Hetchy (USC00043939), California, United States, with 117 years of record.
Key Facts for Hetch Hetchy
- Hetch Hetchy (USC00043939) is a weather station in California, United States at 37.96 latitude and -119.78 longitude, 1,180 m (3,870 ft) above sea level.
- The station reports from 1910 to 2026, 117 years of record.
- 1,464 records set at Hetch Hetchy still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Hetch Hetchy set a daily record high maximum temperature of 30.6 C (87.1 F) on 12 May 2026.
About the Station
- Location: California, United States, 37.96 latitude, -119.78 longitude.
- Elevation: 1,180 m (3,870 ft).
- Period of record: 1910 to 2026, 117 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
13 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 22.2 C (72.0 F) | -19.4 C (-2.9 F) | 20.0 C (68.0 F) | -2.2 C (28.0 F) |
| Feb | 25.6 C (78.1 F) | -17.2 C (1.0 F) | 22.2 C (72.0 F) | -4.4 C (24.1 F) |
| Mar | 31.7 C (89.1 F) | -11.7 C (10.9 F) | 31.7 C (89.1 F) | 0.0 C (32.0 F) |
| Apr | 31.1 C (88.0 F) | -8.9 C (16.0 F) | 24.4 C (75.9 F) | 0.6 C (33.1 F) |
| May | 35.0 C (95.0 F) | -3.9 C (25.0 F) | 31.1 C (88.0 F) | 5.0 C (41.0 F) |
| Jun | 40.6 C (105.1 F) | -1.1 C (30.0 F) | 32.2 C (90.0 F) | 7.8 C (46.0 F) |
| Jul | 39.4 C (102.9 F) | 2.8 C (37.0 F) | 34.4 C (93.9 F) | 10.0 C (50.0 F) |
| Aug | 40.0 C (104.0 F) | -0.6 C (30.9 F) | n/a | n/a |
| Sep | 41.1 C (106.0 F) | 0.0 C (32.0 F) | n/a | n/a |
| Oct | 38.9 C (102.0 F) | -5.0 C (23.0 F) | n/a | n/a |
| Nov | 28.3 C (82.9 F) | -12.2 C (10.0 F) | n/a | n/a |
| Dec | 23.9 C (75.0 F) | -16.7 C (1.9 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1910 | 1 |
| 1911 | 29 |
| 1912 | 28 |
| 1913 | 31 |
| 1914 | 9 |
| 1915 | 31 |
| 1916 | 26 |
| 1917 | 45 |
| 1918 | 11 |
| 1919 | 12 |
| 1920 | 19 |
| 1921 | 12 |
| 1922 | 29 |
| 1923 | 9 |
| 1924 | 23 |
| 1925 | 16 |
| 1926 | 17 |
| 1927 | 15 |
| 1928 | 7 |
| 1929 | 10 |
| 1930 | 10 |
| 1931 | 30 |
| 1932 | 14 |
| 1933 | 21 |
| 1934 | 12 |
| 1935 | 17 |
| 1936 | 14 |
| 1937 | 17 |
| 1938 | 3 |
| 1939 | 13 |
| 1940 | 4 |
| 1941 | 6 |
| 1942 | 8 |
| 1943 | 1 |
| 1944 | 4 |
| 1945 | 4 |
| 1946 | 3 |
| 1947 | 9 |
| 1948 | 10 |
| 1949 | 21 |
| 1950 | 13 |
| 1951 | 7 |
| 1952 | 17 |
| 1953 | 6 |
| 1954 | 17 |
| 1955 | 15 |
| 1956 | 8 |
| 1957 | 8 |
| 1958 | 9 |
| 1959 | 7 |
| 1960 | 12 |
| 1961 | 14 |
| 1962 | 12 |
| 1963 | 12 |
| 1964 | 20 |
| 1965 | 6 |
| 1966 | 7 |
| 1967 | 15 |
| 1968 | 15 |
| 1969 | 2 |
| 1970 | 3 |
| 1971 | 14 |
| 1972 | 15 |
| 1973 | 1 |
| 1974 | 8 |
| 1975 | 12 |
| 1976 | 14 |
| 1977 | 14 |
| 1978 | 4 |
| 1979 | 3 |
| 1980 | 10 |
| 1981 | 10 |
| 1982 | 13 |
| 1983 | 14 |
| 1984 | 2 |
| 1985 | 11 |
| 1986 | 12 |
| 1987 | 12 |
| 1988 | 8 |
| 1989 | 24 |
| 1990 | 11 |
| 1991 | 8 |
| 1992 | 2 |
| 1993 | 8 |
| 1994 | 10 |
| 1995 | 11 |
| 1996 | 18 |
| 1997 | 6 |
| 1998 | 10 |
| 1999 | 21 |
| 2000 | 19 |
| 2001 | 14 |
| 2002 | 9 |
| 2003 | 16 |
| 2004 | 9 |
| 2005 | 3 |
| 2006 | 7 |
| 2007 | 10 |
| 2008 | 9 |
| 2009 | 7 |
| 2010 | 15 |
| 2011 | 9 |
| 2012 | 10 |
| 2014 | 14 |
| 2015 | 31 |
| 2016 | 9 |
| 2017 | 21 |
| 2018 | 8 |
| 2019 | 13 |
| 2020 | 19 |
| 2021 | 16 |
| 2022 | 16 |
| 2023 | 8 |
| 2024 | 13 |
| 2025 | 8 |
| 2026 | 19 |
All-Time Record Progression
2 new records| Date | Kind | Detail |
|---|---|---|
| 1950-11-19 | Record daily precipitation | Record daily precipitation 171.2 mm (6.7 in) |
| 1990-12-21 | Record low maximum temperature | Record low maximum temperature -6.1 C (21.0 F) |
Wettest Day of Each Month
Nov: 171.2 mm (6.7 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 111.5 mm (4.4 in) | 31 January 1963 |
| Feb | 138.4 mm (5.4 in) | 1 February 1963 |
| Mar | 106.7 mm (4.2 in) | 11 March 1995 |
| Apr | 67.8 mm (2.7 in) | 8 April 1935 |
| May | 58.7 mm (2.3 in) | 18 May 2020 |
| Jun | 63.5 mm (2.5 in) | 29 June 2011 |
| Jul | 63.2 mm (2.5 in) | 15 July 1992 |
| Aug | 46.5 mm (1.8 in) | 15 August 1965 |
| Sep | 90.2 mm (3.6 in) | 19 September 1959 |
| Oct | 119.4 mm (4.7 in) | 4 October 1916 |
| Nov | 171.2 mm (6.7 in) | 19 November 1950 |
| Dec | 147.3 mm (5.8 in) | 23 December 1955 |
Period of Record Coverage
1910 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1910 | 78 | 21% | No |
| 1911 | 363 | 99% | Yes |
| 1912 | 359 | 98% | Yes |
| 1913 | 355 | 97% | Yes |
| 1914 | 294 | 81% | No |
| 1915 | 329 | 90% | Yes |
| 1916 | 347 | 95% | Yes |
| 1917 | 316 | 87% | No |
| 1918 | 319 | 87% | No |
| 1919 | 363 | 99% | Yes |
| 1920 | 335 | 92% | Yes |
| 1921 | 315 | 86% | No |
| 1922 | 364 | 100% | Yes |
| 1923 | 364 | 100% | Yes |
| 1924 | 361 | 99% | Yes |
| 1925 | 364 | 100% | Yes |
| 1926 | 365 | 100% | Yes |
| 1927 | 365 | 100% | Yes |
| 1928 | 356 | 97% | Yes |
| 1929 | 332 | 91% | Yes |
| 1930 | 365 | 100% | Yes |
| 1931 | 358 | 98% | Yes |
| 1932 | 366 | 100% | Yes |
| 1933 | 365 | 100% | Yes |
| 1934 | 364 | 100% | Yes |
| 1935 | 365 | 100% | Yes |
| 1936 | 366 | 100% | Yes |
| 1937 | 358 | 98% | Yes |
| 1938 | 365 | 100% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 366 | 100% | Yes |
| 1941 | 365 | 100% | Yes |
| 1942 | 365 | 100% | Yes |
| 1943 | 365 | 100% | Yes |
| 1944 | 365 | 100% | Yes |
| 1945 | 365 | 100% | Yes |
| 1946 | 365 | 100% | Yes |
| 1947 | 365 | 100% | Yes |
| 1948 | 366 | 100% | Yes |
| 1949 | 364 | 100% | Yes |
| 1950 | 356 | 98% | Yes |
| 1951 | 363 | 99% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 364 | 100% | Yes |
| 1954 | 357 | 98% | Yes |
| 1955 | 363 | 99% | Yes |
| 1956 | 347 | 95% | Yes |
| 1957 | 335 | 92% | Yes |
| 1958 | 355 | 97% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 357 | 98% | Yes |
| 1961 | 355 | 97% | Yes |
| 1962 | 339 | 93% | Yes |
| 1963 | 354 | 97% | Yes |
| 1964 | 355 | 97% | Yes |
| 1965 | 350 | 96% | Yes |
| 1966 | 319 | 87% | No |
| 1967 | 352 | 96% | Yes |
| 1968 | 359 | 98% | Yes |
| 1969 | 342 | 94% | Yes |
| 1970 | 354 | 97% | Yes |
| 1971 | 354 | 97% | Yes |
| 1972 | 355 | 97% | Yes |
| 1973 | 316 | 87% | No |
| 1974 | 355 | 97% | Yes |
| 1975 | 318 | 87% | No |
| 1976 | 350 | 96% | Yes |
| 1977 | 358 | 98% | Yes |
| 1978 | 292 | 80% | No |
| 1979 | 324 | 89% | No |
| 1980 | 355 | 97% | Yes |
| 1981 | 356 | 98% | Yes |
| 1982 | 354 | 97% | Yes |
| 1983 | 358 | 98% | Yes |
| 1984 | 359 | 98% | Yes |
| 1985 | 357 | 98% | Yes |
| 1986 | 363 | 99% | Yes |
| 1987 | 361 | 99% | Yes |
| 1988 | 352 | 96% | Yes |
| 1989 | 360 | 99% | Yes |
| 1990 | 353 | 97% | Yes |
| 1991 | 359 | 98% | Yes |
| 1992 | 361 | 99% | Yes |
| 1993 | 362 | 99% | Yes |
| 1994 | 333 | 91% | Yes |
| 1995 | 362 | 99% | Yes |
| 1996 | 363 | 99% | Yes |
| 1997 | 333 | 91% | Yes |
| 1998 | 364 | 100% | Yes |
| 1999 | 357 | 98% | Yes |
| 2000 | 364 | 99% | Yes |
| 2001 | 361 | 99% | Yes |
| 2002 | 361 | 99% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 362 | 99% | Yes |
| 2005 | 360 | 99% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 365 | 100% | Yes |
| 2008 | 366 | 100% | Yes |
| 2009 | 363 | 99% | Yes |
| 2010 | 364 | 100% | Yes |
| 2011 | 334 | 92% | Yes |
| 2012 | 305 | 83% | No |
| 2014 | 365 | 100% | Yes |
| 2015 | 361 | 99% | Yes |
| 2016 | 344 | 94% | Yes |
| 2017 | 352 | 96% | Yes |
| 2018 | 353 | 97% | Yes |
| 2019 | 361 | 99% | Yes |
| 2020 | 364 | 99% | Yes |
| 2021 | 360 | 99% | Yes |
| 2022 | 361 | 99% | Yes |
| 2023 | 352 | 96% | Yes |
| 2024 | 354 | 97% | Yes |
| 2025 | 329 | 90% | Yes |
| 2026 | 211 | 58% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 12 May 2026 | Hetch Hetchy, US | daily high max | 30.6 C (87.1 F) | 0.6 C (1.1 F) | 92 years | 38 of 100 (Notable) |
| 13 April 2026 | Hetch Hetchy, US | daily low max (Tie) | 4.4 C (39.9 F) | tie | 69 years | 7 of 100 (Routine) |
| 31 March 2026 | Hetch Hetchy, US | daily high min | 10.0 C (50.0 F) | 1.1 C (2.0 F) | 103 years | 43 of 100 (Notable) |
| 28 March 2026 | Hetch Hetchy, US | daily high max | 27.2 C (81.0 F) | 1.6 C (2.9 F) | 40 years | 24 of 100 (Routine) |
| 25 March 2026 | Hetch Hetchy, US | daily high max | 28.3 C (82.9 F) | 0.5 C (0.9 F) | 12 years | 13 of 100 (Routine) |
| 24 March 2026 | Hetch Hetchy, US | daily high max | 26.7 C (80.1 F) | 0.6 C (1.1 F) | 96 years | 39 of 100 (Notable) |
| 22 March 2026 | Hetch Hetchy, US | daily high min | 11.1 C (52.0 F) | 1.7 C (3.1 F) | 21 years | 21 of 100 (Routine) |
| 21 March 2026 | Hetch Hetchy, US | monthly high max (Tie) | 31.7 C (89.1 F) | tie | 0 years | 5 of 100 (Routine) |
| 20 March 2026 | Hetch Hetchy, US | daily high min | 10.6 C (51.1 F) | 2.3 C (4.1 F) | 28 years | 24 of 100 (Routine) |
| 20 March 2026 | Hetch Hetchy, US | monthly high max | 31.7 C (89.1 F) | 1.1 C (2.0 F) | 0 years | 21 of 100 (Routine) |
| 19 March 2026 | Hetch Hetchy, US | monthly high max | 30.6 C (87.1 F) | 1.2 C (2.2 F) | 110 years | 52 of 100 (Notable) |
| 19 March 2026 | Hetch Hetchy, US | daily high min | 10.6 C (51.1 F) | 1.7 C (3.1 F) | 21 years | 21 of 100 (Routine) |
| 18 March 2026 | Hetch Hetchy, US | daily high min | 10.0 C (50.0 F) | 0.6 C (1.1 F) | 21 years | 17 of 100 (Routine) |
| 18 March 2026 | Hetch Hetchy, US | monthly high max (Tie) | 29.4 C (84.9 F) | tie | 110 years | 12 of 100 (Routine) |
| 2 March 2026 | Hetch Hetchy, US | daily high min | 6.1 C (43.0 F) | 1.1 C (2.0 F) | 40 years | 25 of 100 (Routine) |
| 20 February 2026 | Hetch Hetchy, US | daily low max | 0.6 C (33.1 F) | 1.6 C (2.9 F) | 56 years | 30 of 100 (Routine) |
| 19 February 2026 | Hetch Hetchy, US | daily low max (Tie) | 0.6 C (33.1 F) | tie | 74 years | 8 of 100 (Routine) |
| 17 February 2026 | Hetch Hetchy, US | daily snowfall (Tie) | 30.5 cm (12.0 in) | tie | 36 years | 5 of 100 (Routine) |
| 5 February 2026 | Hetch Hetchy, US | daily high max | 21.7 C (71.1 F) | 1.1 C (2.0 F) | 11 years | 15 of 100 (Routine) |
| 4 February 2026 | Hetch Hetchy, US | daily high max | 21.7 C (71.1 F) | 1.1 C (2.0 F) | 8 years | 14 of 100 (Routine) |
Climate Trend
96 complete years, 1911 to 2024| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1911 | 10.8 C | -1.37 C |
| 1912 | 10.4 C | -1.80 C |
| 1913 | 11.0 C | -1.22 C |
| 1919 | 11.9 C | -0.30 C |
| 1922 | 12.0 C | -0.21 C |
| 1923 | 11.7 C | -0.51 C |
| 1924 | 10.5 C | -1.69 C |
| 1925 | 12.2 C | -0.04 C |
| 1926 | 13.2 C | +0.98 C |
| 1927 | 11.9 C | -0.29 C |
| 1928 | 12.5 C | +0.28 C |
| 1930 | 11.9 C | -0.31 C |
| 1931 | 12.8 C | +0.57 C |
| 1932 | 11.8 C | -0.38 C |
| 1933 | 11.7 C | -0.45 C |
| 1934 | 13.9 C | +1.66 C |
| 1935 | 11.6 C | -0.57 C |
| 1936 | 12.8 C | +0.62 C |
| 1937 | 11.5 C | -0.74 C |
| 1938 | 12.0 C | -0.22 C |
| 1939 | 12.7 C | +0.51 C |
| 1940 | 12.8 C | +0.57 C |
| 1941 | 11.5 C | -0.74 C |
| 1942 | 11.7 C | -0.48 C |
| 1943 | 12.5 C | +0.29 C |
| 1944 | 11.4 C | -0.78 C |
| 1945 | 11.8 C | -0.41 C |
| 1946 | 11.9 C | -0.27 C |
| 1947 | 12.4 C | +0.17 C |
| 1948 | 10.6 C | -1.55 C |
| 1949 | 11.5 C | -0.68 C |
| 1950 | 12.6 C | +0.44 C |
| 1951 | 11.9 C | -0.26 C |
| 1952 | 11.3 C | -0.88 C |
| 1953 | 11.8 C | -0.42 C |
| 1954 | 12.3 C | +0.13 C |
| 1955 | 11.3 C | -0.85 C |
| 1956 | 11.5 C | -0.68 C |
| 1957 | 11.1 C | -1.07 C |
| 1958 | 12.6 C | +0.42 C |
| 1959 | 13.2 C | +0.98 C |
| 1960 | 12.3 C | +0.08 C |
| 1961 | 12.2 C | +0.03 C |
| 1962 | 11.6 C | -0.59 C |
| 1963 | 11.3 C | -0.87 C |
| 1964 | 11.3 C | -0.93 C |
| 1965 | 11.3 C | -0.94 C |
| 1967 | 11.6 C | -0.63 C |
| 1968 | 11.6 C | -0.59 C |
| 1969 | 11.5 C | -0.72 C |
| 1970 | 12.1 C | -0.11 C |
| 1971 | 11.1 C | -1.12 C |
| 1972 | 11.9 C | -0.31 C |
| 1974 | 12.1 C | -0.06 C |
| 1976 | 11.9 C | -0.29 C |
| 1977 | 12.4 C | +0.17 C |
| 1980 | 12.1 C | -0.13 C |
| 1981 | 12.8 C | +0.57 C |
| 1982 | 10.6 C | -1.56 C |
| 1983 | 11.1 C | -1.08 C |
| 1984 | 12.0 C | -0.22 C |
| 1985 | 11.6 C | -0.62 C |
| 1986 | 12.4 C | +0.19 C |
| 1987 | 12.7 C | +0.46 C |
| 1988 | 13.1 C | +0.94 C |
| 1989 | 12.0 C | -0.20 C |
| 1990 | 11.9 C | -0.33 C |
| 1991 | 12.3 C | +0.07 C |
| 1992 | 12.9 C | +0.73 C |
| 1993 | 12.1 C | -0.05 C |
| 1995 | 12.7 C | +0.46 C |
| 1996 | 12.8 C | +0.65 C |
| 1998 | 10.4 C | -1.80 C |
| 1999 | 11.8 C | -0.40 C |
| 2000 | 13.3 C | +1.15 C |
| 2001 | 13.6 C | +1.36 C |
| 2002 | 13.3 C | +1.11 C |
| 2003 | 13.5 C | +1.30 C |
| 2004 | 13.3 C | +1.07 C |
| 2005 | 11.9 C | -0.25 C |
| 2006 | 12.3 C | +0.15 C |
| 2007 | 12.9 C | +0.74 C |
| 2008 | 12.7 C | +0.51 C |
| 2009 | 12.3 C | +0.09 C |
| 2010 | 11.4 C | -0.80 C |
| 2014 | 14.6 C | +2.37 C |
| 2015 | 14.2 C | +1.96 C |
| 2016 | 13.6 C | +1.38 C |
| 2017 | 13.5 C | +1.30 C |
| 2018 | 13.7 C | +1.49 C |
| 2019 | 12.1 C | -0.05 C |
| 2020 | 13.8 C | +1.58 C |
| 2021 | 13.9 C | +1.68 C |
| 2022 | 13.4 C | +1.19 C |
| 2023 | 12.5 C | +0.33 C |
| 2024 | 13.6 C | +1.45 C |
The annual mean temperature here has risen by 0.1 C (0.1 to 0.2) per decade over 1911 to 2024. In Fahrenheit: 0.3 F (0.2 to 0.3) per decade. The slope is a straight line fitted to 96 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 | 1911 to 2024 | 96 | Rise |
| Mean daily maximum | -0.03 C (-0.09 to 0.03) per decade | -0.1 F (-0.2 to 0.1) per decade | 1911 to 2024 | 96 | Not clearly different from zero |
| Mean daily minimum | 0.3 C (0.3 to 0.4) per decade | 0.6 F (0.5 to 0.6) per decade | 1911 to 2024 | 96 | 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
1910 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 41.1 C (106.0 F) | 1917 | 35.9 C (96.5 F) | 116 |
| Coldest night (TNn) | -19.4 C (-2.9 F) | 1912 | -8.9 C (16.0 F) | 116 |
| Wettest day (Rx1day) | 171.2 mm (6.7 in) | 1950 | 66.0 mm (2.6 in) | 117 |
| Wettest five days (Rx5day) | 395.2 mm (15.6 in) | 1955 | 134.4 mm (5.3 in) | 117 |
| Longest dry spell (CDD) | 147 days | 1995 | 67 days | 117 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1910 | 30.0 C (86.0 F) |
| 1911 | 35.6 C (96.1 F) |
| 1912 | 35.6 C (96.1 F) |
| 1913 | 39.4 C (102.9 F) |
| 1914 | 40.6 C (105.1 F) |
| 1915 | 39.4 C (102.9 F) |
| 1916 | 35.6 C (96.1 F) |
| 1917 | 41.1 C (106.0 F) |
| 1918 | 35.6 C (96.1 F) |
| 1919 | 37.2 C (99.0 F) |
| 1920 | 38.3 C (100.9 F) |
| 1921 | 37.2 C (99.0 F) |
| 1922 | 36.7 C (98.1 F) |
| 1923 | 36.7 C (98.1 F) |
| 1924 | 37.2 C (99.0 F) |
| 1925 | 37.8 C (100.0 F) |
| 1926 | 36.7 C (98.1 F) |
| 1927 | 35.6 C (96.1 F) |
| 1928 | 36.7 C (98.1 F) |
| 1929 | 36.1 C (97.0 F) |
| 1930 | 35.0 C (95.0 F) |
| 1931 | 38.3 C (100.9 F) |
| 1932 | 36.1 C (97.0 F) |
| 1933 | 40.0 C (104.0 F) |
| 1934 | 38.9 C (102.0 F) |
| 1935 | 35.0 C (95.0 F) |
| 1936 | 35.6 C (96.1 F) |
| 1937 | 36.7 C (98.1 F) |
| 1938 | 36.7 C (98.1 F) |
| 1939 | 36.7 C (98.1 F) |
| 1940 | 36.1 C (97.0 F) |
| 1941 | 37.2 C (99.0 F) |
| 1942 | 37.2 C (99.0 F) |
| 1943 | 35.0 C (95.0 F) |
| 1944 | 36.7 C (98.1 F) |
| 1945 | 37.2 C (99.0 F) |
| 1946 | 36.1 C (97.0 F) |
| 1947 | 35.0 C (95.0 F) |
| 1948 | 34.4 C (93.9 F) |
| 1949 | 34.4 C (93.9 F) |
| 1950 | 37.2 C (99.0 F) |
| 1951 | 35.6 C (96.1 F) |
| 1952 | 33.9 C (93.0 F) |
| 1953 | 35.0 C (95.0 F) |
| 1954 | 35.6 C (96.1 F) |
| 1955 | 37.8 C (100.0 F) |
| 1956 | 34.4 C (93.9 F) |
| 1957 | 35.0 C (95.0 F) |
| 1958 | 35.0 C (95.0 F) |
| 1959 | 37.2 C (99.0 F) |
| 1960 | 37.8 C (100.0 F) |
| 1961 | 39.4 C (102.9 F) |
| 1962 | 34.4 C (93.9 F) |
| 1963 | 34.4 C (93.9 F) |
| 1964 | 34.4 C (93.9 F) |
| 1965 | 32.2 C (90.0 F) |
| 1966 | 35.0 C (95.0 F) |
| 1967 | 34.4 C (93.9 F) |
| 1968 | 35.0 C (95.0 F) |
| 1969 | 33.9 C (93.0 F) |
| 1970 | 35.0 C (95.0 F) |
| 1971 | 36.1 C (97.0 F) |
| 1972 | 38.3 C (100.9 F) |
| 1973 | 34.4 C (93.9 F) |
| 1974 | 32.2 C (90.0 F) |
| 1975 | 35.6 C (96.1 F) |
| 1976 | 35.6 C (96.1 F) |
| 1977 | 36.1 C (97.0 F) |
| 1978 | 35.0 C (95.0 F) |
| 1979 | 34.4 C (93.9 F) |
| 1980 | 38.9 C (102.0 F) |
| 1981 | 37.8 C (100.0 F) |
| 1982 | 33.9 C (93.0 F) |
| 1983 | 37.2 C (99.0 F) |
| 1984 | 35.6 C (96.1 F) |
| 1985 | 34.4 C (93.9 F) |
| 1986 | 33.9 C (93.0 F) |
| 1987 | 36.1 C (97.0 F) |
| 1988 | 37.2 C (99.0 F) |
| 1989 | 36.7 C (98.1 F) |
| 1990 | 35.6 C (96.1 F) |
| 1991 | 35.6 C (96.1 F) |
| 1992 | 33.9 C (93.0 F) |
| 1993 | 33.9 C (93.0 F) |
| 1994 | 35.0 C (95.0 F) |
| 1995 | 34.4 C (93.9 F) |
| 1996 | 35.0 C (95.0 F) |
| 1997 | 37.2 C (99.0 F) |
| 1998 | 35.0 C (95.0 F) |
| 1999 | 33.9 C (93.0 F) |
| 2000 | 35.6 C (96.1 F) |
| 2001 | 35.6 C (96.1 F) |
| 2002 | 37.2 C (99.0 F) |
| 2003 | 35.6 C (96.1 F) |
| 2004 | 36.1 C (97.0 F) |
| 2005 | 35.6 C (96.1 F) |
| 2006 | 37.8 C (100.0 F) |
| 2007 | 37.8 C (100.0 F) |
| 2008 | 38.3 C (100.9 F) |
| 2009 | 35.6 C (96.1 F) |
| 2010 | 36.7 C (98.1 F) |
| 2011 | 32.8 C (91.0 F) |
| 2012 | 36.1 C (97.0 F) |
| 2013 | n/a |
| 2014 | 38.9 C (102.0 F) |
| 2015 | 36.1 C (97.0 F) |
| 2016 | 36.1 C (97.0 F) |
| 2017 | 35.6 C (96.1 F) |
| 2018 | 35.0 C (95.0 F) |
| 2019 | 33.3 C (91.9 F) |
| 2020 | 37.2 C (99.0 F) |
| 2021 | 37.8 C (100.0 F) |
| 2022 | 39.4 C (102.9 F) |
| 2023 | 38.3 C (100.9 F) |
| 2024 | 38.3 C (100.9 F) |
| 2025 | 37.2 C (99.0 F) |
| 2026 | 34.4 C (93.9 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1910 | -7.2 C (19.0 F) |
| 1911 | -15.0 C (5.0 F) |
| 1912 | -19.4 C (-2.9 F) |
| 1913 | -16.1 C (3.0 F) |
| 1914 | -12.2 C (10.0 F) |
| 1915 | -8.3 C (17.1 F) |
| 1916 | -14.4 C (6.1 F) |
| 1917 | -15.0 C (5.0 F) |
| 1918 | -12.2 C (10.0 F) |
| 1919 | -10.6 C (12.9 F) |
| 1920 | -10.0 C (14.0 F) |
| 1921 | -11.1 C (12.0 F) |
| 1922 | -13.3 C (8.1 F) |
| 1923 | -11.1 C (12.0 F) |
| 1924 | -15.0 C (5.0 F) |
| 1925 | -7.2 C (19.0 F) |
| 1926 | -11.7 C (10.9 F) |
| 1927 | -6.7 C (19.9 F) |
| 1928 | -10.6 C (12.9 F) |
| 1929 | -12.8 C (9.0 F) |
| 1930 | -12.2 C (10.0 F) |
| 1931 | -12.8 C (9.0 F) |
| 1932 | -17.2 C (1.0 F) |
| 1933 | -14.4 C (6.1 F) |
| 1934 | -8.3 C (17.1 F) |
| 1935 | -16.1 C (3.0 F) |
| 1936 | -8.9 C (16.0 F) |
| 1937 | -18.3 C (-0.9 F) |
| 1938 | -8.3 C (17.1 F) |
| 1939 | -11.1 C (12.0 F) |
| 1940 | -8.3 C (17.1 F) |
| 1941 | -9.4 C (15.1 F) |
| 1942 | -13.3 C (8.1 F) |
| 1943 | -7.8 C (18.0 F) |
| 1944 | -6.7 C (19.9 F) |
| 1945 | -8.9 C (16.0 F) |
| 1946 | -8.9 C (16.0 F) |
| 1947 | -8.9 C (16.0 F) |
| 1948 | -11.1 C (12.0 F) |
| 1949 | -13.3 C (8.1 F) |
| 1950 | -15.0 C (5.0 F) |
| 1951 | -11.7 C (10.9 F) |
| 1952 | -11.7 C (10.9 F) |
| 1953 | -9.4 C (15.1 F) |
| 1954 | -8.3 C (17.1 F) |
| 1955 | -10.6 C (12.9 F) |
| 1956 | -11.1 C (12.0 F) |
| 1957 | -13.3 C (8.1 F) |
| 1958 | -8.3 C (17.1 F) |
| 1959 | -10.6 C (12.9 F) |
| 1960 | -12.2 C (10.0 F) |
| 1961 | -8.3 C (17.1 F) |
| 1962 | -12.8 C (9.0 F) |
| 1963 | -8.9 C (16.0 F) |
| 1964 | -7.2 C (19.0 F) |
| 1965 | -12.2 C (10.0 F) |
| 1966 | -10.0 C (14.0 F) |
| 1967 | -11.7 C (10.9 F) |
| 1968 | -12.2 C (10.0 F) |
| 1969 | -11.7 C (10.9 F) |
| 1970 | -7.8 C (18.0 F) |
| 1971 | -9.4 C (15.1 F) |
| 1972 | -16.7 C (1.9 F) |
| 1973 | -6.1 C (21.0 F) |
| 1974 | -10.0 C (14.0 F) |
| 1975 | -8.9 C (16.0 F) |
| 1976 | -7.2 C (19.0 F) |
| 1977 | -7.8 C (18.0 F) |
| 1978 | -7.2 C (19.0 F) |
| 1979 | -6.7 C (19.9 F) |
| 1980 | -6.1 C (21.0 F) |
| 1981 | -6.7 C (19.9 F) |
| 1982 | -9.4 C (15.1 F) |
| 1983 | -5.6 C (21.9 F) |
| 1984 | -8.3 C (17.1 F) |
| 1985 | -8.3 C (17.1 F) |
| 1986 | -4.4 C (24.1 F) |
| 1987 | -8.9 C (16.0 F) |
| 1988 | -10.6 C (12.9 F) |
| 1989 | -14.4 C (6.1 F) |
| 1990 | -15.6 C (3.9 F) |
| 1991 | -6.1 C (21.0 F) |
| 1992 | -7.8 C (18.0 F) |
| 1993 | -9.4 C (15.1 F) |
| 1994 | -8.3 C (17.1 F) |
| 1995 | -3.9 C (25.0 F) |
| 1996 | -10.0 C (14.0 F) |
| 1997 | -8.9 C (16.0 F) |
| 1998 | -11.1 C (12.0 F) |
| 1999 | -8.3 C (17.1 F) |
| 2000 | -3.3 C (26.1 F) |
| 2001 | -4.4 C (24.1 F) |
| 2002 | -8.9 C (16.0 F) |
| 2003 | -6.1 C (21.0 F) |
| 2004 | -7.8 C (18.0 F) |
| 2005 | -5.6 C (21.9 F) |
| 2006 | -11.7 C (10.9 F) |
| 2007 | -11.1 C (12.0 F) |
| 2008 | -8.3 C (17.1 F) |
| 2009 | -10.6 C (12.9 F) |
| 2010 | -8.9 C (16.0 F) |
| 2011 | -7.8 C (18.0 F) |
| 2012 | -6.1 C (21.0 F) |
| 2013 | n/a |
| 2014 | -3.3 C (26.1 F) |
| 2015 | -8.9 C (16.0 F) |
| 2016 | -5.6 C (21.9 F) |
| 2017 | -6.1 C (21.0 F) |
| 2018 | -9.4 C (15.1 F) |
| 2019 | -10.0 C (14.0 F) |
| 2020 | -4.4 C (24.1 F) |
| 2021 | -6.7 C (19.9 F) |
| 2022 | -6.7 C (19.9 F) |
| 2023 | -7.8 C (18.0 F) |
| 2024 | -7.8 C (18.0 F) |
| 2025 | -3.9 C (25.0 F) |
| 2026 | -4.4 C (24.1 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1910 | 28.2 mm (1.1 in) |
| 1911 | 100.6 mm (4.0 in) |
| 1912 | 53.8 mm (2.1 in) |
| 1913 | 45.7 mm (1.8 in) |
| 1914 | 93.5 mm (3.7 in) |
| 1915 | 107.7 mm (4.2 in) |
| 1916 | 119.4 mm (4.7 in) |
| 1917 | 40.6 mm (1.6 in) |
| 1918 | 51.3 mm (2.0 in) |
| 1919 | 51.1 mm (2.0 in) |
| 1920 | 55.9 mm (2.2 in) |
| 1921 | 101.6 mm (4.0 in) |
| 1922 | 45.7 mm (1.8 in) |
| 1923 | 43.2 mm (1.7 in) |
| 1924 | 56.4 mm (2.2 in) |
| 1925 | 82.6 mm (3.3 in) |
| 1926 | 67.1 mm (2.6 in) |
| 1927 | 49.8 mm (2.0 in) |
| 1928 | 79.5 mm (3.1 in) |
| 1929 | 68.6 mm (2.7 in) |
| 1930 | 46.2 mm (1.8 in) |
| 1931 | 71.6 mm (2.8 in) |
| 1932 | 52.1 mm (2.1 in) |
| 1933 | 66.0 mm (2.6 in) |
| 1934 | 45.5 mm (1.8 in) |
| 1935 | 67.8 mm (2.7 in) |
| 1936 | 92.2 mm (3.6 in) |
| 1937 | 114.3 mm (4.5 in) |
| 1938 | 63.8 mm (2.5 in) |
| 1939 | 36.8 mm (1.4 in) |
| 1940 | 82.8 mm (3.3 in) |
| 1941 | 66.0 mm (2.6 in) |
| 1942 | 68.8 mm (2.7 in) |
| 1943 | 72.6 mm (2.9 in) |
| 1944 | 55.9 mm (2.2 in) |
| 1945 | 110.7 mm (4.4 in) |
| 1946 | 98.6 mm (3.9 in) |
| 1947 | 44.5 mm (1.8 in) |
| 1948 | 51.8 mm (2.0 in) |
| 1949 | 72.4 mm (2.9 in) |
| 1950 | 171.2 mm (6.7 in) |
| 1951 | 71.4 mm (2.8 in) |
| 1952 | 61.0 mm (2.4 in) |
| 1953 | 47.0 mm (1.9 in) |
| 1954 | 64.0 mm (2.5 in) |
| 1955 | 147.3 mm (5.8 in) |
| 1956 | 58.9 mm (2.3 in) |
| 1957 | 52.1 mm (2.1 in) |
| 1958 | 43.2 mm (1.7 in) |
| 1959 | 90.2 mm (3.6 in) |
| 1960 | 68.3 mm (2.7 in) |
| 1961 | 35.8 mm (1.4 in) |
| 1962 | 90.7 mm (3.6 in) |
| 1963 | 138.4 mm (5.4 in) |
| 1964 | 115.1 mm (4.5 in) |
| 1965 | 47.5 mm (1.9 in) |
| 1966 | 82.8 mm (3.3 in) |
| 1967 | 60.2 mm (2.4 in) |
| 1968 | 54.6 mm (2.1 in) |
| 1969 | 94.0 mm (3.7 in) |
| 1970 | 88.4 mm (3.5 in) |
| 1971 | 61.0 mm (2.4 in) |
| 1972 | 31.5 mm (1.2 in) |
| 1973 | 63.8 mm (2.5 in) |
| 1974 | 53.3 mm (2.1 in) |
| 1975 | 76.2 mm (3.0 in) |
| 1976 | 63.8 mm (2.5 in) |
| 1977 | 71.1 mm (2.8 in) |
| 1978 | 69.6 mm (2.7 in) |
| 1979 | 62.2 mm (2.4 in) |
| 1980 | 78.0 mm (3.1 in) |
| 1981 | 63.0 mm (2.5 in) |
| 1982 | 91.7 mm (3.6 in) |
| 1983 | 71.6 mm (2.8 in) |
| 1984 | 50.3 mm (2.0 in) |
| 1985 | 38.6 mm (1.5 in) |
| 1986 | 79.2 mm (3.1 in) |
| 1987 | 61.7 mm (2.4 in) |
| 1988 | 86.4 mm (3.4 in) |
| 1989 | 54.9 mm (2.2 in) |
| 1990 | 34.0 mm (1.3 in) |
| 1991 | 57.7 mm (2.3 in) |
| 1992 | 63.2 mm (2.5 in) |
| 1993 | 42.9 mm (1.7 in) |
| 1994 | 52.6 mm (2.1 in) |
| 1995 | 106.7 mm (4.2 in) |
| 1996 | 71.6 mm (2.8 in) |
| 1997 | 82.0 mm (3.2 in) |
| 1998 | 72.4 mm (2.9 in) |
| 1999 | 58.4 mm (2.3 in) |
| 2000 | 53.1 mm (2.1 in) |
| 2001 | 56.4 mm (2.2 in) |
| 2002 | 82.0 mm (3.2 in) |
| 2003 | 66.0 mm (2.6 in) |
| 2004 | 76.2 mm (3.0 in) |
| 2005 | 88.1 mm (3.5 in) |
| 2006 | 67.1 mm (2.6 in) |
| 2007 | 52.6 mm (2.1 in) |
| 2008 | 88.6 mm (3.5 in) |
| 2009 | 73.2 mm (2.9 in) |
| 2010 | 80.5 mm (3.2 in) |
| 2011 | 63.5 mm (2.5 in) |
| 2012 | 91.9 mm (3.6 in) |
| 2013 | 19.6 mm (0.8 in) |
| 2014 | 50.5 mm (2.0 in) |
| 2015 | 86.4 mm (3.4 in) |
| 2016 | 96.8 mm (3.8 in) |
| 2017 | 96.5 mm (3.8 in) |
| 2018 | 73.7 mm (2.9 in) |
| 2019 | 49.3 mm (1.9 in) |
| 2020 | 58.7 mm (2.3 in) |
| 2021 | 93.7 mm (3.7 in) |
| 2022 | 87.4 mm (3.4 in) |
| 2023 | 101.6 mm (4.0 in) |
| 2024 | 65.5 mm (2.6 in) |
| 2025 | 75.7 mm (3.0 in) |
| 2026 | 38.4 mm (1.5 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1910 | 46.4 mm (1.8 in) |
| 1911 | 237.5 mm (9.4 in) |
| 1912 | 103.9 mm (4.1 in) |
| 1913 | 96.0 mm (3.8 in) |
| 1914 | 214.7 mm (8.5 in) |
| 1915 | 132.3 mm (5.2 in) |
| 1916 | 93.1 mm (3.7 in) |
| 1917 | 43.6 mm (1.7 in) |
| 1918 | 128.9 mm (5.1 in) |
| 1919 | 120.5 mm (4.7 in) |
| 1920 | 89.1 mm (3.5 in) |
| 1921 | 213.4 mm (8.4 in) |
| 1922 | 110.4 mm (4.3 in) |
| 1923 | 118.9 mm (4.7 in) |
| 1924 | 83.0 mm (3.3 in) |
| 1925 | 175.8 mm (6.9 in) |
| 1926 | 169.2 mm (6.7 in) |
| 1927 | 121.4 mm (4.8 in) |
| 1928 | 215.6 mm (8.5 in) |
| 1929 | 97.9 mm (3.9 in) |
| 1930 | 97.3 mm (3.8 in) |
| 1931 | 183.3 mm (7.2 in) |
| 1932 | 140.3 mm (5.5 in) |
| 1933 | 129.9 mm (5.1 in) |
| 1934 | 105.4 mm (4.1 in) |
| 1935 | 139.4 mm (5.5 in) |
| 1936 | 166.6 mm (6.6 in) |
| 1937 | 245.3 mm (9.7 in) |
| 1938 | 157.7 mm (6.2 in) |
| 1939 | 68.1 mm (2.7 in) |
| 1940 | 193.8 mm (7.6 in) |
| 1941 | 157.5 mm (6.2 in) |
| 1942 | 162.8 mm (6.4 in) |
| 1943 | 209.7 mm (8.3 in) |
| 1944 | 131.3 mm (5.2 in) |
| 1945 | 228.4 mm (9.0 in) |
| 1946 | 179.1 mm (7.1 in) |
| 1947 | 74.0 mm (2.9 in) |
| 1948 | 78.8 mm (3.1 in) |
| 1949 | 98.6 mm (3.9 in) |
| 1950 | 300.0 mm (11.8 in) |
| 1951 | 154.2 mm (6.1 in) |
| 1952 | 154.2 mm (6.1 in) |
| 1953 | 71.8 mm (2.8 in) |
| 1954 | 134.4 mm (5.3 in) |
| 1955 | 395.2 mm (15.6 in) |
| 1956 | 151.8 mm (6.0 in) |
| 1957 | 88.7 mm (3.5 in) |
| 1958 | 149.9 mm (5.9 in) |
| 1959 | 117.2 mm (4.6 in) |
| 1960 | 124.8 mm (4.9 in) |
| 1961 | 81.8 mm (3.2 in) |
| 1962 | 228.3 mm (9.0 in) |
| 1963 | 310.8 mm (12.2 in) |
| 1964 | 243.2 mm (9.6 in) |
| 1965 | 132.6 mm (5.2 in) |
| 1966 | 194.8 mm (7.7 in) |
| 1967 | 163.4 mm (6.4 in) |
| 1968 | 83.8 mm (3.3 in) |
| 1969 | 235.7 mm (9.3 in) |
| 1970 | 164.4 mm (6.5 in) |
| 1971 | 100.9 mm (4.0 in) |
| 1972 | 68.8 mm (2.7 in) |
| 1973 | 122.8 mm (4.8 in) |
| 1974 | 106.4 mm (4.2 in) |
| 1975 | 141.5 mm (5.6 in) |
| 1976 | 81.9 mm (3.2 in) |
| 1977 | 138.9 mm (5.5 in) |
| 1978 | 215.4 mm (8.5 in) |
| 1979 | 71.1 mm (2.8 in) |
| 1980 | 295.1 mm (11.6 in) |
| 1981 | 154.3 mm (6.1 in) |
| 1982 | 152.9 mm (6.0 in) |
| 1983 | 180.8 mm (7.1 in) |
| 1984 | 78.2 mm (3.1 in) |
| 1985 | 83.8 mm (3.3 in) |
| 1986 | 306.4 mm (12.1 in) |
| 1987 | 96.5 mm (3.8 in) |
| 1988 | 88.7 mm (3.5 in) |
| 1989 | 95.4 mm (3.8 in) |
| 1990 | 57.4 mm (2.3 in) |
| 1991 | 174.3 mm (6.9 in) |
| 1992 | 113.9 mm (4.5 in) |
| 1993 | 104.5 mm (4.1 in) |
| 1994 | 109.5 mm (4.3 in) |
| 1995 | 213.7 mm (8.4 in) |
| 1996 | 141.9 mm (5.6 in) |
| 1997 | 243.4 mm (9.6 in) |
| 1998 | 148.4 mm (5.8 in) |
| 1999 | 134.1 mm (5.3 in) |
| 2000 | 150.7 mm (5.9 in) |
| 2001 | 114.1 mm (4.5 in) |
| 2002 | 156.7 mm (6.2 in) |
| 2003 | 104.1 mm (4.1 in) |
| 2004 | 165.6 mm (6.5 in) |
| 2005 | 190.2 mm (7.5 in) |
| 2006 | 193.1 mm (7.6 in) |
| 2007 | 85.3 mm (3.4 in) |
| 2008 | 160.8 mm (6.3 in) |
| 2009 | 133.9 mm (5.3 in) |
| 2010 | 164.9 mm (6.5 in) |
| 2011 | 117.1 mm (4.6 in) |
| 2012 | 139.4 mm (5.5 in) |
| 2013 | 28.2 mm (1.1 in) |
| 2014 | 97.1 mm (3.8 in) |
| 2015 | 119.6 mm (4.7 in) |
| 2016 | 99.8 mm (3.9 in) |
| 2017 | 221.4 mm (8.7 in) |
| 2018 | 143.1 mm (5.6 in) |
| 2019 | 154.4 mm (6.1 in) |
| 2020 | 88.9 mm (3.5 in) |
| 2021 | 148.3 mm (5.8 in) |
| 2022 | 178.8 mm (7.0 in) |
| 2023 | 237.0 mm (9.3 in) |
| 2024 | 93.4 mm (3.7 in) |
| 2025 | 116.1 mm (4.6 in) |
| 2026 | 102.4 mm (4.0 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1910 | 29 days |
| 1911 | 68 days |
| 1912 | 47 days |
| 1913 | 37 days |
| 1914 | 85 days |
| 1915 | 111 days |
| 1916 | 94 days |
| 1917 | 22 days |
| 1918 | 44 days |
| 1919 | 23 days |
| 1920 | 32 days |
| 1921 | 28 days |
| 1922 | 17 days |
| 1923 | 23 days |
| 1924 | 21 days |
| 1925 | 36 days |
| 1926 | 83 days |
| 1927 | 87 days |
| 1928 | 114 days |
| 1929 | 94 days |
| 1930 | 94 days |
| 1931 | 56 days |
| 1932 | 44 days |
| 1933 | 89 days |
| 1934 | 72 days |
| 1935 | 123 days |
| 1936 | 44 days |
| 1937 | 81 days |
| 1938 | 53 days |
| 1939 | 64 days |
| 1940 | 109 days |
| 1941 | 50 days |
| 1942 | 104 days |
| 1943 | 135 days |
| 1944 | 88 days |
| 1945 | 40 days |
| 1946 | 99 days |
| 1947 | 101 days |
| 1948 | 125 days |
| 1949 | 48 days |
| 1950 | 92 days |
| 1951 | 123 days |
| 1952 | 47 days |
| 1953 | 101 days |
| 1954 | 114 days |
| 1955 | 136 days |
| 1956 | 85 days |
| 1957 | 47 days |
| 1958 | 47 days |
| 1959 | 110 days |
| 1960 | 121 days |
| 1961 | 37 days |
| 1962 | 47 days |
| 1963 | 76 days |
| 1964 | 75 days |
| 1965 | 28 days |
| 1966 | 100 days |
| 1967 | 65 days |
| 1968 | 53 days |
| 1969 | 80 days |
| 1970 | 115 days |
| 1971 | 70 days |
| 1972 | 79 days |
| 1973 | 38 days |
| 1974 | 58 days |
| 1975 | 54 days |
| 1976 | 44 days |
| 1977 | 98 days |
| 1978 | 56 days |
| 1979 | 112 days |
| 1980 | 67 days |
| 1981 | 111 days |
| 1982 | 60 days |
| 1983 | 64 days |
| 1984 | 33 days |
| 1985 | 50 days |
| 1986 | 76 days |
| 1987 | 78 days |
| 1988 | 66 days |
| 1989 | 60 days |
| 1990 | 53 days |
| 1991 | 68 days |
| 1992 | 45 days |
| 1993 | 119 days |
| 1994 | 104 days |
| 1995 | 147 days |
| 1996 | 31 days |
| 1997 | 33 days |
| 1998 | 82 days |
| 1999 | 67 days |
| 2000 | 63 days |
| 2001 | 76 days |
| 2002 | 96 days |
| 2003 | 65 days |
| 2004 | 82 days |
| 2005 | 58 days |
| 2006 | 72 days |
| 2007 | 66 days |
| 2008 | 127 days |
| 2009 | 69 days |
| 2010 | 72 days |
| 2011 | 4 days |
| 2012 | 29 days |
| 2013 | 24 days |
| 2014 | 49 days |
| 2015 | 54 days |
| 2016 | 100 days |
| 2017 | 96 days |
| 2018 | 36 days |
| 2019 | 109 days |
| 2020 | 79 days |
| 2021 | 64 days |
| 2022 | 85 days |
| 2023 | 31 days |
| 2024 | 50 days |
| 2025 | 71 days |
| 2026 | 57 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
96 years with a frostAcross 96 years with a frost, the median last spring frost at Hetch Hetchy falls on 30 April and the median first autumn frost on 31 October, which leaves a median of 180 days between them.
In 1990 to 2024 the median growing season was 201 days. That is 28 days more than in 1911 to 1948.
Fitted over all years, the growing season changes by +3.6 days per decade at this station.
| Measure | Median, all years | Earliest period (1911 to 1948) | Recent period (1990 to 2024) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 30 April | 2 May | 21 April | 11 days earlier | -1.6 days per decade |
| First autumn frost | 31 October | 26 October | 7 November | 12 days later | +2.0 days per decade |
| Growing days | 180 days | 173 days | 201 days | 28 days more | +3.6 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
100 years, 1911 to 2025A day with at least 68.3 mm (2.7 in) of rain is expected about once in 2 years. A day with at least 145.8 mm (5.7 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 68.3 mm (2.7 in) | |
| 5 years | 89.3 mm (3.5 in) | |
| 10 years | 103.1 mm (4.1 in) | |
| 25 years | 120.5 mm (4.7 in) | |
| 50 years | 133.2 mm (5.2 in) | |
| 100 years | 145.8 mm (5.7 in) |
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 100 years of values from 1911 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: 171.2 mm (6.7 in) in 1950; 147.3 mm (5.8 in) in 1955; 138.4 mm (5.4 in) in 1963.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Climate Twins
2007 to 2024 against 1961 to 1990Over 2007 to 2024, Hetch Hetchy had a mean temperature of 13.2 C (55.8 F) and 903.4 mm (35.6 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Placerville (United States, 122 km away), Montelimar (France, 9,282 km away) and Covelo (United States, 364 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Placerville | United States | 122 km (76 mi) | 13.6 C (56.5 F) | 901.9 mm (35.5 in) | 0.70 |
| Montelimar | France | 9,282 km (5,768 mi) | 13.0 C (55.3 F) | 913.3 mm (36.0 in) | 0.80 |
| Covelo | United States | 364 km (226 mi) | 12.9 C (55.2 F) | 1,024.2 mm (40.3 in) | 1.12 |
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.
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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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-12).