Saint Helena Weather Records (USC00047643)
Record envelope, standing records and threshold days for Saint Helena (USC00047643), California, United States, with 117 years of record.
Key Facts for Saint Helena
- Saint Helena (USC00047643) is a weather station in California, United States at 38.51 latitude and -122.47 longitude, 69 m (225 ft) above sea level.
- The station reports from 1907 to 2023, 117 years of record.
- 1,464 records set at Saint Helena still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Saint Helena tied a daily record high minimum temperature of 11.1 C (52.0 F) on 13 March 2023.
About the Station
- Location: California, United States, 38.51 latitude, -122.47 longitude.
- Elevation: 69 m (225 ft).
- Period of record: 1907 to 2023, 117 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 28.3 C (82.9 F) | -8.9 C (16.0 F) | n/a | n/a |
| Feb | 30.0 C (86.0 F) | -7.8 C (18.0 F) | n/a | n/a |
| Mar | 35.0 C (95.0 F) | -4.4 C (24.1 F) | n/a | n/a |
| Apr | 36.7 C (98.1 F) | -2.8 C (27.0 F) | n/a | n/a |
| May | 41.7 C (107.1 F) | -0.6 C (30.9 F) | n/a | n/a |
| Jun | 43.3 C (109.9 F) | 2.2 C (36.0 F) | n/a | n/a |
| Jul | 46.1 C (115.0 F) | 2.8 C (37.0 F) | n/a | n/a |
| Aug | 44.4 C (111.9 F) | 3.3 C (37.9 F) | n/a | n/a |
| Sep | 45.0 C (113.0 F) | 0.6 C (33.1 F) | n/a | n/a |
| Oct | 40.0 C (104.0 F) | -5.6 C (21.9 F) | n/a | n/a |
| Nov | 33.9 C (93.0 F) | -10.6 C (12.9 F) | n/a | n/a |
| Dec | 28.3 C (82.9 F) | -11.7 C (10.9 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1907 | 1 |
| 1908 | 15 |
| 1909 | 26 |
| 1910 | 13 |
| 1911 | 18 |
| 1912 | 14 |
| 1913 | 21 |
| 1914 | 13 |
| 1915 | 7 |
| 1916 | 14 |
| 1917 | 7 |
| 1918 | 16 |
| 1919 | 31 |
| 1920 | 61 |
| 1921 | 38 |
| 1922 | 21 |
| 1923 | 19 |
| 1924 | 28 |
| 1925 | 24 |
| 1926 | 26 |
| 1927 | 13 |
| 1928 | 9 |
| 1929 | 33 |
| 1930 | 29 |
| 1931 | 19 |
| 1932 | 24 |
| 1933 | 32 |
| 1934 | 13 |
| 1935 | 19 |
| 1936 | 13 |
| 1937 | 17 |
| 1938 | 14 |
| 1939 | 17 |
| 1940 | 7 |
| 1941 | 12 |
| 1942 | 6 |
| 1943 | 13 |
| 1944 | 7 |
| 1945 | 4 |
| 1946 | 13 |
| 1947 | 8 |
| 1948 | 14 |
| 1949 | 14 |
| 1950 | 22 |
| 1951 | 9 |
| 1952 | 8 |
| 1953 | 4 |
| 1954 | 6 |
| 1955 | 18 |
| 1956 | 4 |
| 1957 | 7 |
| 1958 | 9 |
| 1959 | 8 |
| 1960 | 9 |
| 1961 | 12 |
| 1962 | 12 |
| 1963 | 10 |
| 1964 | 14 |
| 1965 | 3 |
| 1966 | 13 |
| 1967 | 16 |
| 1968 | 12 |
| 1969 | 7 |
| 1970 | 10 |
| 1971 | 9 |
| 1972 | 16 |
| 1973 | 11 |
| 1974 | 7 |
| 1975 | 9 |
| 1976 | 15 |
| 1977 | 9 |
| 1978 | 6 |
| 1979 | 2 |
| 1980 | 3 |
| 1981 | 5 |
| 1982 | 8 |
| 1983 | 4 |
| 1984 | 11 |
| 1985 | 19 |
| 1986 | 2 |
| 1987 | 7 |
| 1988 | 4 |
| 1989 | 14 |
| 1990 | 11 |
| 1991 | 4 |
| 1992 | 5 |
| 1993 | 3 |
| 1994 | 3 |
| 1995 | 3 |
| 1996 | 22 |
| 1997 | 14 |
| 1998 | 3 |
| 1999 | 5 |
| 2000 | 15 |
| 2001 | 8 |
| 2002 | 4 |
| 2003 | 8 |
| 2004 | 6 |
| 2005 | 11 |
| 2006 | 11 |
| 2007 | 5 |
| 2008 | 8 |
| 2009 | 7 |
| 2010 | 6 |
| 2011 | 14 |
| 2012 | 2 |
| 2013 | 13 |
| 2014 | 19 |
| 2015 | 16 |
| 2016 | 11 |
| 2017 | 21 |
| 2018 | 12 |
| 2019 | 16 |
| 2020 | 22 |
| 2021 | 5 |
| 2022 | 12 |
| 2023 | 2 |
All-Time Record Progression
3 new records| Date | Kind | Detail |
|---|---|---|
| 1943-05-22 | Record high minimum temperature | Record high minimum temperature 24.4 C (75.9 F) |
| 1976-06-24 | Record high minimum temperature | Record high minimum temperature 25.6 C (78.1 F) |
| 2021-10-24 | Record daily precipitation | Record daily precipitation 252.2 mm (9.9 in) |
Wettest Day of Each Month
Oct: 252.2 mm (9.9 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 173.5 mm (6.8 in) | 21 January 1967 |
| Feb | 147.3 mm (5.8 in) | 16 February 1986 |
| Mar | 162.6 mm (6.4 in) | 9 March 1995 |
| Apr | 89.4 mm (3.5 in) | 1 April 1927 |
| May | 50.8 mm (2.0 in) | 18 May 2005 |
| Jun | 40.9 mm (1.6 in) | 2 June 1967 |
| Jul | 25.7 mm (1.0 in) | 8 July 1974 |
| Aug | 18.5 mm (0.7 in) | 20 August 1997 |
| Sep | 93.0 mm (3.7 in) | 18 September 1959 |
| Oct | 252.2 mm (9.9 in) | 24 October 2021 |
| Nov | 131.8 mm (5.2 in) | 21 November 1977 |
| Dec | 177.8 mm (7.0 in) | 30 December 1913 |
Period of Record Coverage
1907 to 2023| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1907 | 68 | 19% | No |
| 1908 | 365 | 100% | Yes |
| 1909 | 364 | 100% | Yes |
| 1910 | 334 | 92% | Yes |
| 1911 | 358 | 98% | Yes |
| 1912 | 366 | 100% | Yes |
| 1913 | 365 | 100% | Yes |
| 1914 | 365 | 100% | Yes |
| 1915 | 365 | 100% | Yes |
| 1916 | 365 | 100% | Yes |
| 1917 | 357 | 98% | Yes |
| 1918 | 365 | 100% | Yes |
| 1919 | 352 | 96% | Yes |
| 1920 | 283 | 77% | No |
| 1921 | 364 | 100% | Yes |
| 1922 | 365 | 100% | Yes |
| 1923 | 365 | 100% | Yes |
| 1924 | 365 | 100% | Yes |
| 1925 | 365 | 100% | Yes |
| 1926 | 365 | 100% | Yes |
| 1927 | 365 | 100% | Yes |
| 1928 | 365 | 100% | Yes |
| 1929 | 365 | 100% | Yes |
| 1930 | 365 | 100% | Yes |
| 1931 | 356 | 98% | Yes |
| 1932 | 352 | 96% | Yes |
| 1933 | 364 | 100% | Yes |
| 1934 | 365 | 100% | Yes |
| 1935 | 364 | 100% | Yes |
| 1936 | 365 | 100% | Yes |
| 1937 | 363 | 99% | Yes |
| 1938 | 364 | 100% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 366 | 100% | Yes |
| 1941 | 365 | 100% | Yes |
| 1942 | 365 | 100% | Yes |
| 1943 | 365 | 100% | Yes |
| 1944 | 366 | 100% | Yes |
| 1945 | 365 | 100% | Yes |
| 1946 | 363 | 99% | Yes |
| 1947 | 365 | 100% | Yes |
| 1948 | 366 | 100% | Yes |
| 1949 | 365 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 363 | 99% | Yes |
| 1953 | 354 | 97% | Yes |
| 1954 | 351 | 96% | Yes |
| 1955 | 353 | 97% | Yes |
| 1956 | 355 | 97% | Yes |
| 1957 | 358 | 98% | Yes |
| 1958 | 363 | 99% | Yes |
| 1959 | 327 | 90% | No |
| 1960 | 351 | 96% | Yes |
| 1961 | 336 | 92% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 364 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 364 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 180 | 49% | No |
| 1980 | 58 | 16% | No |
| 1981 | 301 | 82% | No |
| 1982 | 334 | 92% | Yes |
| 1983 | 365 | 100% | Yes |
| 1984 | 264 | 72% | No |
| 1985 | 302 | 83% | No |
| 1986 | 271 | 74% | No |
| 1987 | 150 | 41% | No |
| 1988 | 244 | 67% | No |
| 1989 | 363 | 99% | Yes |
| 1990 | 333 | 91% | Yes |
| 1991 | 363 | 99% | Yes |
| 1992 | 333 | 91% | Yes |
| 1993 | 360 | 99% | Yes |
| 1994 | 362 | 99% | Yes |
| 1995 | 362 | 99% | Yes |
| 1996 | 362 | 99% | Yes |
| 1997 | 360 | 99% | Yes |
| 1998 | 322 | 88% | No |
| 1999 | 326 | 89% | No |
| 2000 | 348 | 95% | Yes |
| 2001 | 353 | 97% | Yes |
| 2002 | 347 | 95% | Yes |
| 2003 | 352 | 96% | Yes |
| 2004 | 327 | 89% | No |
| 2005 | 318 | 87% | No |
| 2006 | 352 | 96% | Yes |
| 2007 | 349 | 96% | Yes |
| 2008 | 353 | 96% | Yes |
| 2009 | 326 | 89% | No |
| 2010 | 357 | 98% | Yes |
| 2011 | 357 | 98% | Yes |
| 2012 | 296 | 81% | No |
| 2013 | 358 | 98% | Yes |
| 2014 | 362 | 99% | Yes |
| 2015 | 364 | 100% | Yes |
| 2016 | 365 | 100% | Yes |
| 2017 | 363 | 99% | Yes |
| 2018 | 365 | 100% | Yes |
| 2019 | 313 | 86% | No |
| 2020 | 295 | 81% | No |
| 2021 | 326 | 89% | No |
| 2022 | 264 | 72% | No |
| 2023 | 116 | 32% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 13 March 2023 | Saint Helena, US | daily high min (Tie) | 11.1 C (52.0 F) | tie | 56 years | 6 of 100 (Routine) |
| 10 March 2023 | Saint Helena, US | daily rain | 53.3 mm (2.1 in) | 9.9 mm (0.39 in) | 6 years | 18 of 100 (Routine) |
| 24 February 2023 | Saint Helena, US | daily low max | 7.8 C (46.0 F) | 0.5 C (0.9 F) | 87 years | 37 of 100 (Notable) |
| 23 February 2023 | Saint Helena, US | daily low max | 9.4 C (48.9 F) | 0.6 C (1.1 F) | 109 years | 41 of 100 (Notable) |
| 20 October 2022 | Saint Helena, US | daily high max | 35.0 C (95.0 F) | 1.1 C (2.0 F) | 100 years | 42 of 100 (Notable) |
| 12 September 2022 | Saint Helena, US | daily high min | 18.3 C (64.9 F) | 0.5 C (0.9 F) | 4 years | 12 of 100 (Routine) |
| 8 September 2022 | Saint Helena, US | daily high min | 18.3 C (64.9 F) | 1.6 C (2.9 F) | 48 years | 29 of 100 (Routine) |
| 6 September 2022 | Saint Helena, US | monthly high max (Tie) | 45.0 C (113.0 F) | tie | 67 years | 10 of 100 (Routine) |
| 5 September 2022 | Saint Helena, US | daily high max | 44.4 C (111.9 F) | 2.7 C (4.9 F) | 99 years | 44 of 100 (Notable) |
| 23 August 2022 | Saint Helena, US | daily high min | 16.1 C (61.0 F) | 0.5 C (0.9 F) | 17 years | 16 of 100 (Routine) |
| 25 May 2022 | Saint Helena, US | daily high min | 16.7 C (62.1 F) | 1.7 C (3.1 F) | 25 years | 22 of 100 (Routine) |
| 25 May 2022 | Saint Helena, US | daily high max (Tie) | 37.8 C (100.0 F) | tie | 71 years | 7 of 100 (Routine) |
| 24 May 2022 | Saint Helena, US | daily high max | 37.2 C (99.0 F) | 0.5 C (0.9 F) | 84 years | 35 of 100 (Notable) |
| 10 April 2022 | Saint Helena, US | daily high min | 15.0 C (59.0 F) | 2.2 C (4.0 F) | 8 years | 18 of 100 (Routine) |
| 23 March 2022 | Saint Helena, US | daily high max | 30.6 C (87.1 F) | 1.2 C (2.2 F) | 96 years | 40 of 100 (Notable) |
| 22 March 2022 | Saint Helena, US | daily high max | 30.0 C (86.0 F) | 0.6 C (1.1 F) | 113 years | 41 of 100 (Notable) |
| 10 February 2022 | Saint Helena, US | daily high max | 27.2 C (81.0 F) | 1.1 C (2.0 F) | 16 years | 16 of 100 (Routine) |
| 9 February 2022 | Saint Helena, US | daily high max | 26.1 C (79.0 F) | 0.5 C (0.9 F) | 6 years | 12 of 100 (Routine) |
| 29 November 2021 | Saint Helena, US | daily high max (Tie) | 23.3 C (73.9 F) | tie | 114 years | 10 of 100 (Routine) |
| 30 October 2021 | Saint Helena, US | daily high min (Tie) | 15.0 C (59.0 F) | tie | 38 years | 5 of 100 (Routine) |
Climate Trend
90 complete years, 1908 to 2018| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1908 | 14.7 C | -0.35 C |
| 1909 | 14.3 C | -0.70 C |
| 1911 | 14.0 C | -1.01 C |
| 1912 | 14.4 C | -0.64 C |
| 1913 | 15.1 C | +0.05 C |
| 1914 | 15.1 C | +0.02 C |
| 1915 | 15.2 C | +0.20 C |
| 1916 | 14.5 C | -0.58 C |
| 1917 | 14.9 C | -0.10 C |
| 1918 | 14.8 C | -0.21 C |
| 1921 | 15.2 C | +0.14 C |
| 1922 | 14.2 C | -0.84 C |
| 1923 | 14.3 C | -0.70 C |
| 1924 | 14.0 C | -1.00 C |
| 1925 | 14.0 C | -1.06 C |
| 1926 | 14.7 C | -0.36 C |
| 1927 | 14.2 C | -0.81 C |
| 1928 | 14.0 C | -1.09 C |
| 1929 | 14.1 C | -0.96 C |
| 1930 | 13.7 C | -1.30 C |
| 1932 | 14.6 C | -0.42 C |
| 1933 | 14.1 C | -0.98 C |
| 1934 | 15.2 C | +0.16 C |
| 1935 | 14.0 C | -1.01 C |
| 1936 | 15.0 C | -0.07 C |
| 1937 | 14.4 C | -0.62 C |
| 1938 | 14.5 C | -0.55 C |
| 1939 | 15.3 C | +0.25 C |
| 1940 | 15.3 C | +0.27 C |
| 1941 | 15.0 C | -0.06 C |
| 1942 | 14.4 C | -0.63 C |
| 1943 | 15.1 C | +0.10 C |
| 1944 | 14.6 C | -0.48 C |
| 1945 | 14.8 C | -0.22 C |
| 1946 | 14.2 C | -0.81 C |
| 1947 | 14.8 C | -0.22 C |
| 1948 | 13.8 C | -1.26 C |
| 1949 | 14.2 C | -0.82 C |
| 1950 | 15.0 C | 0.00 C |
| 1951 | 14.5 C | -0.51 C |
| 1952 | 14.5 C | -0.53 C |
| 1953 | 14.8 C | -0.20 C |
| 1954 | 14.4 C | -0.60 C |
| 1955 | 14.3 C | -0.74 C |
| 1956 | 14.7 C | -0.38 C |
| 1957 | 14.7 C | -0.36 C |
| 1958 | 15.8 C | +0.76 C |
| 1960 | 15.1 C | +0.09 C |
| 1961 | 15.1 C | +0.06 C |
| 1962 | 14.7 C | -0.35 C |
| 1963 | 14.5 C | -0.58 C |
| 1964 | 14.7 C | -0.31 C |
| 1965 | 14.4 C | -0.66 C |
| 1966 | 15.2 C | +0.16 C |
| 1967 | 14.9 C | -0.18 C |
| 1968 | 15.1 C | +0.01 C |
| 1969 | 14.8 C | -0.26 C |
| 1970 | 15.1 C | +0.07 C |
| 1971 | 14.2 C | -0.84 C |
| 1972 | 14.4 C | -0.62 C |
| 1973 | 15.0 C | -0.09 C |
| 1974 | 14.9 C | -0.17 C |
| 1975 | 14.2 C | -0.84 C |
| 1976 | 15.1 C | +0.09 C |
| 1977 | 15.2 C | +0.11 C |
| 1978 | 15.3 C | +0.25 C |
| 1983 | 15.5 C | +0.42 C |
| 1989 | 14.9 C | -0.14 C |
| 1991 | 15.4 C | +0.35 C |
| 1993 | 15.5 C | +0.49 C |
| 1994 | 15.0 C | 0.00 C |
| 1995 | 16.2 C | +1.20 C |
| 1996 | 16.4 C | +1.35 C |
| 1997 | 16.7 C | +1.70 C |
| 2000 | 16.0 C | +0.92 C |
| 2001 | 16.2 C | +1.15 C |
| 2002 | 16.0 C | +0.99 C |
| 2003 | 16.1 C | +1.07 C |
| 2004 | 16.2 C | +1.17 C |
| 2006 | 15.8 C | +0.76 C |
| 2007 | 16.0 C | +0.99 C |
| 2008 | 16.0 C | +0.92 C |
| 2010 | 15.4 C | +0.34 C |
| 2011 | 15.3 C | +0.28 C |
| 2013 | 16.5 C | +1.49 C |
| 2014 | 17.4 C | +2.36 C |
| 2015 | 17.3 C | +2.26 C |
| 2016 | 16.6 C | +1.59 C |
| 2017 | 17.0 C | +1.96 C |
| 2018 | 16.7 C | +1.69 C |
The annual mean temperature here has risen by 0.2 C (0.2 to 0.2) per decade over 1908 to 2018. In Fahrenheit: 0.3 F (0.3 to 0.4) per decade. The slope is a straight line fitted to 90 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 (0.2 to 0.2) per decade | 0.3 F (0.3 to 0.4) per decade | 1908 to 2018 | 90 | Rise |
| Mean daily maximum | 0.05 C (0.00 to 0.09) per decade | 0.08 F (0.00 to 0.16) per decade | 1908 to 2018 | 90 | Rise |
| Mean daily minimum | 0.3 C (0.3 to 0.4) per decade | 0.6 F (0.5 to 0.7) per decade | 1908 to 2018 | 90 | 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
1907 to 2023| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 46.1 C (115.0 F) | 1913 | 41.7 C (107.1 F) | 117 |
| Coldest night (TNn) | -11.7 C (10.9 F) | 1932 | -4.4 C (24.1 F) | 117 |
| Wettest day (Rx1day) | 252.2 mm (9.9 in) | 2021 | 77.0 mm (3.0 in) | 117 |
| Wettest five days (Rx5day) | 472.1 mm (18.6 in) | 1986 | 163.1 mm (6.4 in) | 117 |
| Longest dry spell (CDD) | 228 days | 2019 | 102 days | 117 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1907 | 28.9 C (84.0 F) |
| 1908 | 41.1 C (106.0 F) |
| 1909 | 42.8 C (109.0 F) |
| 1910 | 41.7 C (107.1 F) |
| 1911 | 38.9 C (102.0 F) |
| 1912 | 39.4 C (102.9 F) |
| 1913 | 46.1 C (115.0 F) |
| 1914 | 40.6 C (105.1 F) |
| 1915 | 44.4 C (111.9 F) |
| 1916 | 42.2 C (108.0 F) |
| 1917 | 41.1 C (106.0 F) |
| 1918 | 42.8 C (109.0 F) |
| 1919 | 43.9 C (111.0 F) |
| 1920 | 43.3 C (109.9 F) |
| 1921 | 44.4 C (111.9 F) |
| 1922 | 41.1 C (106.0 F) |
| 1923 | 43.3 C (109.9 F) |
| 1924 | 40.0 C (104.0 F) |
| 1925 | 44.4 C (111.9 F) |
| 1926 | 42.8 C (109.0 F) |
| 1927 | 41.7 C (107.1 F) |
| 1928 | 41.1 C (106.0 F) |
| 1929 | 41.1 C (106.0 F) |
| 1930 | 40.6 C (105.1 F) |
| 1931 | 45.6 C (114.1 F) |
| 1932 | 42.2 C (108.0 F) |
| 1933 | 41.7 C (107.1 F) |
| 1934 | 41.7 C (107.1 F) |
| 1935 | 41.7 C (107.1 F) |
| 1936 | 41.1 C (106.0 F) |
| 1937 | 42.8 C (109.0 F) |
| 1938 | 40.6 C (105.1 F) |
| 1939 | 42.2 C (108.0 F) |
| 1940 | 41.7 C (107.1 F) |
| 1941 | 38.9 C (102.0 F) |
| 1942 | 41.7 C (107.1 F) |
| 1943 | 41.7 C (107.1 F) |
| 1944 | 44.4 C (111.9 F) |
| 1945 | 41.1 C (106.0 F) |
| 1946 | 42.8 C (109.0 F) |
| 1947 | 40.0 C (104.0 F) |
| 1948 | 40.6 C (105.1 F) |
| 1949 | 41.7 C (107.1 F) |
| 1950 | 44.4 C (111.9 F) |
| 1951 | 41.7 C (107.1 F) |
| 1952 | 42.2 C (108.0 F) |
| 1953 | 41.7 C (107.1 F) |
| 1954 | 42.8 C (109.0 F) |
| 1955 | 45.0 C (113.0 F) |
| 1956 | 41.1 C (106.0 F) |
| 1957 | 42.8 C (109.0 F) |
| 1958 | 41.1 C (106.0 F) |
| 1959 | 43.9 C (111.0 F) |
| 1960 | 41.7 C (107.1 F) |
| 1961 | 43.3 C (109.9 F) |
| 1962 | 41.1 C (106.0 F) |
| 1963 | 39.4 C (102.9 F) |
| 1964 | 41.1 C (106.0 F) |
| 1965 | 38.3 C (100.9 F) |
| 1966 | 41.1 C (106.0 F) |
| 1967 | 40.0 C (104.0 F) |
| 1968 | 39.4 C (102.9 F) |
| 1969 | 42.2 C (108.0 F) |
| 1970 | 41.7 C (107.1 F) |
| 1971 | 43.9 C (111.0 F) |
| 1972 | 46.1 C (115.0 F) |
| 1973 | 41.7 C (107.1 F) |
| 1974 | 40.6 C (105.1 F) |
| 1975 | 43.3 C (109.9 F) |
| 1976 | 43.3 C (109.9 F) |
| 1977 | 42.8 C (109.0 F) |
| 1978 | 41.1 C (106.0 F) |
| 1979 | 34.4 C (93.9 F) |
| 1980 | 30.0 C (86.0 F) |
| 1981 | 42.2 C (108.0 F) |
| 1982 | 38.3 C (100.9 F) |
| 1983 | 42.2 C (108.0 F) |
| 1984 | 41.7 C (107.1 F) |
| 1985 | 40.6 C (105.1 F) |
| 1986 | 37.8 C (100.0 F) |
| 1987 | 38.9 C (102.0 F) |
| 1988 | 41.7 C (107.1 F) |
| 1989 | 40.6 C (105.1 F) |
| 1990 | 41.7 C (107.1 F) |
| 1991 | 42.8 C (109.0 F) |
| 1992 | 38.9 C (102.0 F) |
| 1993 | 43.9 C (111.0 F) |
| 1994 | 40.0 C (104.0 F) |
| 1995 | 41.7 C (107.1 F) |
| 1996 | 43.3 C (109.9 F) |
| 1997 | 41.7 C (107.1 F) |
| 1998 | 41.1 C (106.0 F) |
| 1999 | 40.0 C (104.0 F) |
| 2000 | 41.7 C (107.1 F) |
| 2001 | 39.4 C (102.9 F) |
| 2002 | 42.2 C (108.0 F) |
| 2003 | 38.9 C (102.0 F) |
| 2004 | 37.8 C (100.0 F) |
| 2005 | 37.8 C (100.0 F) |
| 2006 | 42.2 C (108.0 F) |
| 2007 | 38.9 C (102.0 F) |
| 2008 | 39.4 C (102.9 F) |
| 2009 | 39.4 C (102.9 F) |
| 2010 | 40.0 C (104.0 F) |
| 2011 | 37.2 C (99.0 F) |
| 2012 | 39.4 C (102.9 F) |
| 2013 | 39.4 C (102.9 F) |
| 2014 | 38.3 C (100.9 F) |
| 2015 | 40.6 C (105.1 F) |
| 2016 | 40.0 C (104.0 F) |
| 2017 | 45.0 C (113.0 F) |
| 2018 | 41.1 C (106.0 F) |
| 2019 | 39.4 C (102.9 F) |
| 2020 | 45.0 C (113.0 F) |
| 2021 | 41.7 C (107.1 F) |
| 2022 | 45.0 C (113.0 F) |
| 2023 | 32.8 C (91.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1907 | -1.7 C (28.9 F) |
| 1908 | -5.6 C (21.9 F) |
| 1909 | -5.0 C (23.0 F) |
| 1910 | -5.6 C (21.9 F) |
| 1911 | -5.0 C (23.0 F) |
| 1912 | -4.4 C (24.1 F) |
| 1913 | -4.4 C (24.1 F) |
| 1914 | -3.3 C (26.1 F) |
| 1915 | -6.1 C (21.0 F) |
| 1916 | -3.9 C (25.0 F) |
| 1917 | -3.9 C (25.0 F) |
| 1918 | -3.9 C (25.0 F) |
| 1919 | -7.8 C (18.0 F) |
| 1920 | -3.9 C (25.0 F) |
| 1921 | -5.0 C (23.0 F) |
| 1922 | -7.8 C (18.0 F) |
| 1923 | -6.1 C (21.0 F) |
| 1924 | -8.9 C (16.0 F) |
| 1925 | -4.4 C (24.1 F) |
| 1926 | -3.9 C (25.0 F) |
| 1927 | -3.9 C (25.0 F) |
| 1928 | -5.6 C (21.9 F) |
| 1929 | -6.1 C (21.0 F) |
| 1930 | -7.8 C (18.0 F) |
| 1931 | -5.0 C (23.0 F) |
| 1932 | -11.7 C (10.9 F) |
| 1933 | -4.4 C (24.1 F) |
| 1934 | -1.7 C (28.9 F) |
| 1935 | -4.4 C (24.1 F) |
| 1936 | -6.1 C (21.0 F) |
| 1937 | -8.9 C (16.0 F) |
| 1938 | -4.4 C (24.1 F) |
| 1939 | -3.9 C (25.0 F) |
| 1940 | -4.4 C (24.1 F) |
| 1941 | -3.9 C (25.0 F) |
| 1942 | -5.0 C (23.0 F) |
| 1943 | -6.1 C (21.0 F) |
| 1944 | -2.8 C (27.0 F) |
| 1945 | -5.6 C (21.9 F) |
| 1946 | -5.0 C (23.0 F) |
| 1947 | -5.6 C (21.9 F) |
| 1948 | -7.2 C (19.0 F) |
| 1949 | -7.2 C (19.0 F) |
| 1950 | -6.7 C (19.9 F) |
| 1951 | -4.4 C (24.1 F) |
| 1952 | -5.0 C (23.0 F) |
| 1953 | -2.8 C (27.0 F) |
| 1954 | -3.9 C (25.0 F) |
| 1955 | -3.9 C (25.0 F) |
| 1956 | -5.6 C (21.9 F) |
| 1957 | -5.6 C (21.9 F) |
| 1958 | -3.9 C (25.0 F) |
| 1959 | -3.9 C (25.0 F) |
| 1960 | -6.1 C (21.0 F) |
| 1961 | -6.1 C (21.0 F) |
| 1962 | -5.6 C (21.9 F) |
| 1963 | -6.1 C (21.0 F) |
| 1964 | -3.9 C (25.0 F) |
| 1965 | -5.6 C (21.9 F) |
| 1966 | -4.4 C (24.1 F) |
| 1967 | -3.9 C (25.0 F) |
| 1968 | -6.1 C (21.0 F) |
| 1969 | -4.4 C (24.1 F) |
| 1970 | -4.4 C (24.1 F) |
| 1971 | -4.4 C (24.1 F) |
| 1972 | -8.3 C (17.1 F) |
| 1973 | -6.1 C (21.0 F) |
| 1974 | -4.4 C (24.1 F) |
| 1975 | -6.1 C (21.0 F) |
| 1976 | -6.1 C (21.0 F) |
| 1977 | -3.9 C (25.0 F) |
| 1978 | -5.6 C (21.9 F) |
| 1979 | -3.3 C (26.1 F) |
| 1980 | -6.1 C (21.0 F) |
| 1981 | 0.0 C (32.0 F) |
| 1982 | -5.0 C (23.0 F) |
| 1983 | -4.4 C (24.1 F) |
| 1984 | -5.6 C (21.9 F) |
| 1985 | -3.3 C (26.1 F) |
| 1986 | -1.1 C (30.0 F) |
| 1987 | -0.6 C (30.9 F) |
| 1988 | -2.8 C (27.0 F) |
| 1989 | -4.4 C (24.1 F) |
| 1990 | -10.0 C (14.0 F) |
| 1991 | -4.4 C (24.1 F) |
| 1992 | -5.0 C (23.0 F) |
| 1993 | -3.3 C (26.1 F) |
| 1994 | -2.2 C (28.0 F) |
| 1995 | 0.0 C (32.0 F) |
| 1996 | -1.1 C (30.0 F) |
| 1997 | -1.7 C (28.9 F) |
| 1998 | -4.4 C (24.1 F) |
| 1999 | -1.7 C (28.9 F) |
| 2000 | -3.3 C (26.1 F) |
| 2001 | -3.3 C (26.1 F) |
| 2002 | -2.8 C (27.0 F) |
| 2003 | -1.7 C (28.9 F) |
| 2004 | -1.7 C (28.9 F) |
| 2005 | -1.1 C (30.0 F) |
| 2006 | -1.7 C (28.9 F) |
| 2007 | -4.4 C (24.1 F) |
| 2008 | -2.8 C (27.0 F) |
| 2009 | -4.4 C (24.1 F) |
| 2010 | -1.7 C (28.9 F) |
| 2011 | -2.2 C (28.0 F) |
| 2012 | -3.9 C (25.0 F) |
| 2013 | -4.4 C (24.1 F) |
| 2014 | -0.6 C (30.9 F) |
| 2015 | -3.9 C (25.0 F) |
| 2016 | -4.4 C (24.1 F) |
| 2017 | -1.7 C (28.9 F) |
| 2018 | -1.7 C (28.9 F) |
| 2019 | -10.6 C (12.9 F) |
| 2020 | -7.8 C (18.0 F) |
| 2021 | -1.7 C (28.9 F) |
| 2022 | -1.7 C (28.9 F) |
| 2023 | -1.7 C (28.9 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1907 | 41.7 mm (1.6 in) |
| 1908 | 46.2 mm (1.8 in) |
| 1909 | 83.8 mm (3.3 in) |
| 1910 | 64.8 mm (2.6 in) |
| 1911 | 99.1 mm (3.9 in) |
| 1912 | 77.0 mm (3.0 in) |
| 1913 | 177.8 mm (7.0 in) |
| 1914 | 87.6 mm (3.4 in) |
| 1915 | 115.6 mm (4.6 in) |
| 1916 | 134.1 mm (5.3 in) |
| 1917 | 91.4 mm (3.6 in) |
| 1918 | 63.0 mm (2.5 in) |
| 1919 | 66.8 mm (2.6 in) |
| 1920 | 54.6 mm (2.1 in) |
| 1921 | 78.7 mm (3.1 in) |
| 1922 | 55.1 mm (2.2 in) |
| 1923 | 48.0 mm (1.9 in) |
| 1924 | 91.2 mm (3.6 in) |
| 1925 | 128.3 mm (5.1 in) |
| 1926 | 86.4 mm (3.4 in) |
| 1927 | 89.4 mm (3.5 in) |
| 1928 | 50.3 mm (2.0 in) |
| 1929 | 106.9 mm (4.2 in) |
| 1930 | 53.8 mm (2.1 in) |
| 1931 | 89.7 mm (3.5 in) |
| 1932 | 54.1 mm (2.1 in) |
| 1933 | 52.3 mm (2.1 in) |
| 1934 | 49.0 mm (1.9 in) |
| 1935 | 71.9 mm (2.8 in) |
| 1936 | 73.7 mm (2.9 in) |
| 1937 | 132.8 mm (5.2 in) |
| 1938 | 51.6 mm (2.0 in) |
| 1939 | 41.9 mm (1.6 in) |
| 1940 | 109.2 mm (4.3 in) |
| 1941 | 78.7 mm (3.1 in) |
| 1942 | 75.7 mm (3.0 in) |
| 1943 | 112.0 mm (4.4 in) |
| 1944 | 57.2 mm (2.3 in) |
| 1945 | 72.6 mm (2.9 in) |
| 1946 | 62.0 mm (2.4 in) |
| 1947 | 65.8 mm (2.6 in) |
| 1948 | 68.3 mm (2.7 in) |
| 1949 | 50.5 mm (2.0 in) |
| 1950 | 104.4 mm (4.1 in) |
| 1951 | 75.2 mm (3.0 in) |
| 1952 | 105.7 mm (4.2 in) |
| 1953 | 71.6 mm (2.8 in) |
| 1954 | 89.2 mm (3.5 in) |
| 1955 | 146.3 mm (5.8 in) |
| 1956 | 103.9 mm (4.1 in) |
| 1957 | 71.4 mm (2.8 in) |
| 1958 | 83.1 mm (3.3 in) |
| 1959 | 93.0 mm (3.7 in) |
| 1960 | 109.2 mm (4.3 in) |
| 1961 | 89.4 mm (3.5 in) |
| 1962 | 141.7 mm (5.6 in) |
| 1963 | 117.6 mm (4.6 in) |
| 1964 | 102.1 mm (4.0 in) |
| 1965 | 103.4 mm (4.1 in) |
| 1966 | 96.3 mm (3.8 in) |
| 1967 | 173.5 mm (6.8 in) |
| 1968 | 103.4 mm (4.1 in) |
| 1969 | 76.5 mm (3.0 in) |
| 1970 | 101.6 mm (4.0 in) |
| 1971 | 57.7 mm (2.3 in) |
| 1972 | 37.3 mm (1.5 in) |
| 1973 | 65.5 mm (2.6 in) |
| 1974 | 60.7 mm (2.4 in) |
| 1975 | 68.3 mm (2.7 in) |
| 1976 | 35.3 mm (1.4 in) |
| 1977 | 131.8 mm (5.2 in) |
| 1978 | 65.0 mm (2.6 in) |
| 1979 | 99.6 mm (3.9 in) |
| 1980 | 139.7 mm (5.5 in) |
| 1981 | 104.1 mm (4.1 in) |
| 1982 | 128.3 mm (5.1 in) |
| 1983 | 103.6 mm (4.1 in) |
| 1984 | 30.5 mm (1.2 in) |
| 1985 | 114.3 mm (4.5 in) |
| 1986 | 147.3 mm (5.8 in) |
| 1987 | 76.2 mm (3.0 in) |
| 1988 | 51.8 mm (2.0 in) |
| 1989 | 49.8 mm (2.0 in) |
| 1990 | 58.4 mm (2.3 in) |
| 1991 | 94.0 mm (3.7 in) |
| 1992 | 82.3 mm (3.2 in) |
| 1993 | 58.4 mm (2.3 in) |
| 1994 | 51.3 mm (2.0 in) |
| 1995 | 162.6 mm (6.4 in) |
| 1996 | 87.1 mm (3.4 in) |
| 1997 | 99.1 mm (3.9 in) |
| 1998 | 49.5 mm (1.9 in) |
| 1999 | 106.7 mm (4.2 in) |
| 2000 | 67.8 mm (2.7 in) |
| 2001 | 52.6 mm (2.1 in) |
| 2002 | 106.7 mm (4.2 in) |
| 2003 | 55.9 mm (2.2 in) |
| 2004 | 80.0 mm (3.1 in) |
| 2005 | 133.6 mm (5.3 in) |
| 2006 | 68.6 mm (2.7 in) |
| 2007 | 38.1 mm (1.5 in) |
| 2008 | 104.1 mm (4.1 in) |
| 2009 | 91.4 mm (3.6 in) |
| 2010 | 55.9 mm (2.2 in) |
| 2011 | 59.2 mm (2.3 in) |
| 2012 | 73.7 mm (2.9 in) |
| 2013 | 20.3 mm (0.8 in) |
| 2014 | 138.4 mm (5.4 in) |
| 2015 | 71.1 mm (2.8 in) |
| 2016 | 66.0 mm (2.6 in) |
| 2017 | 83.6 mm (3.3 in) |
| 2018 | 54.4 mm (2.1 in) |
| 2019 | 84.3 mm (3.3 in) |
| 2020 | 17.8 mm (0.7 in) |
| 2021 | 252.2 mm (9.9 in) |
| 2022 | 33.5 mm (1.3 in) |
| 2023 | 58.4 mm (2.3 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1907 | 85.6 mm (3.4 in) |
| 1908 | 75.7 mm (3.0 in) |
| 1909 | 242.0 mm (9.5 in) |
| 1910 | 85.8 mm (3.4 in) |
| 1911 | 206.0 mm (8.1 in) |
| 1912 | 116.0 mm (4.6 in) |
| 1913 | 268.0 mm (10.6 in) |
| 1914 | 307.6 mm (12.1 in) |
| 1915 | 199.5 mm (7.9 in) |
| 1916 | 196.8 mm (7.7 in) |
| 1917 | 228.9 mm (9.0 in) |
| 1918 | 95.8 mm (3.8 in) |
| 1919 | 176.2 mm (6.9 in) |
| 1920 | 137.2 mm (5.4 in) |
| 1921 | 152.1 mm (6.0 in) |
| 1922 | 144.3 mm (5.7 in) |
| 1923 | 80.6 mm (3.2 in) |
| 1924 | 101.8 mm (4.0 in) |
| 1925 | 199.7 mm (7.9 in) |
| 1926 | 221.1 mm (8.7 in) |
| 1927 | 182.0 mm (7.2 in) |
| 1928 | 144.5 mm (5.7 in) |
| 1929 | 206.7 mm (8.1 in) |
| 1930 | 83.5 mm (3.3 in) |
| 1931 | 204.0 mm (8.0 in) |
| 1932 | 100.6 mm (4.0 in) |
| 1933 | 103.6 mm (4.1 in) |
| 1934 | 115.3 mm (4.5 in) |
| 1935 | 90.7 mm (3.6 in) |
| 1936 | 187.9 mm (7.4 in) |
| 1937 | 199.7 mm (7.9 in) |
| 1938 | 154.6 mm (6.1 in) |
| 1939 | 65.3 mm (2.6 in) |
| 1940 | 232.4 mm (9.1 in) |
| 1941 | 135.3 mm (5.3 in) |
| 1942 | 227.9 mm (9.0 in) |
| 1943 | 231.4 mm (9.1 in) |
| 1944 | 117.7 mm (4.6 in) |
| 1945 | 194.0 mm (7.6 in) |
| 1946 | 120.9 mm (4.8 in) |
| 1947 | 90.8 mm (3.6 in) |
| 1948 | 83.8 mm (3.3 in) |
| 1949 | 94.3 mm (3.7 in) |
| 1950 | 169.3 mm (6.7 in) |
| 1951 | 163.1 mm (6.4 in) |
| 1952 | 187.3 mm (7.4 in) |
| 1953 | 110.2 mm (4.3 in) |
| 1954 | 162.3 mm (6.4 in) |
| 1955 | 397.1 mm (15.6 in) |
| 1956 | 247.4 mm (9.7 in) |
| 1957 | 160.4 mm (6.3 in) |
| 1958 | 171.5 mm (6.8 in) |
| 1959 | 165.1 mm (6.5 in) |
| 1960 | 218.1 mm (8.6 in) |
| 1961 | 194.6 mm (7.7 in) |
| 1962 | 298.9 mm (11.8 in) |
| 1963 | 251.1 mm (9.9 in) |
| 1964 | 255.5 mm (10.1 in) |
| 1965 | 190.5 mm (7.5 in) |
| 1966 | 179.3 mm (7.1 in) |
| 1967 | 301.8 mm (11.9 in) |
| 1968 | 160.3 mm (6.3 in) |
| 1969 | 199.5 mm (7.9 in) |
| 1970 | 217.5 mm (8.6 in) |
| 1971 | 110.8 mm (4.4 in) |
| 1972 | 114.0 mm (4.5 in) |
| 1973 | 223.7 mm (8.8 in) |
| 1974 | 113.6 mm (4.5 in) |
| 1975 | 159.1 mm (6.3 in) |
| 1976 | 56.5 mm (2.2 in) |
| 1977 | 159.7 mm (6.3 in) |
| 1978 | 180.1 mm (7.1 in) |
| 1979 | 188.1 mm (7.4 in) |
| 1980 | 230.1 mm (9.1 in) |
| 1981 | 213.3 mm (8.4 in) |
| 1982 | 213.6 mm (8.4 in) |
| 1983 | 242.5 mm (9.5 in) |
| 1984 | 69.6 mm (2.7 in) |
| 1985 | 128.5 mm (5.1 in) |
| 1986 | 472.1 mm (18.6 in) |
| 1987 | 104.1 mm (4.1 in) |
| 1988 | 95.0 mm (3.7 in) |
| 1989 | 85.3 mm (3.4 in) |
| 1990 | 90.4 mm (3.6 in) |
| 1991 | 237.0 mm (9.3 in) |
| 1992 | 192.8 mm (7.6 in) |
| 1993 | 137.9 mm (5.4 in) |
| 1994 | 92.7 mm (3.6 in) |
| 1995 | 250.2 mm (9.9 in) |
| 1996 | 151.5 mm (6.0 in) |
| 1997 | 230.7 mm (9.1 in) |
| 1998 | 149.3 mm (5.9 in) |
| 1999 | 182.5 mm (7.2 in) |
| 2000 | 184.1 mm (7.2 in) |
| 2001 | 148.9 mm (5.9 in) |
| 2002 | 324.6 mm (12.8 in) |
| 2003 | 85.3 mm (3.4 in) |
| 2004 | 153.7 mm (6.1 in) |
| 2005 | 258.1 mm (10.2 in) |
| 2006 | 261.9 mm (10.3 in) |
| 2007 | 118.1 mm (4.6 in) |
| 2008 | 159.5 mm (6.3 in) |
| 2009 | 144.3 mm (5.7 in) |
| 2010 | 205.5 mm (8.1 in) |
| 2011 | 150.7 mm (5.9 in) |
| 2012 | 167.6 mm (6.6 in) |
| 2013 | 34.5 mm (1.4 in) |
| 2014 | 233.4 mm (9.2 in) |
| 2015 | 155.7 mm (6.1 in) |
| 2016 | 116.1 mm (4.6 in) |
| 2017 | 240.5 mm (9.5 in) |
| 2018 | 77.5 mm (3.1 in) |
| 2019 | 168.1 mm (6.6 in) |
| 2020 | 34.8 mm (1.4 in) |
| 2021 | 275.6 mm (10.9 in) |
| 2022 | 33.5 mm (1.3 in) |
| 2023 | 147.0 mm (5.8 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1907 | 21 days |
| 1908 | 74 days |
| 1909 | 98 days |
| 1910 | 126 days |
| 1911 | 122 days |
| 1912 | 73 days |
| 1913 | 125 days |
| 1914 | 86 days |
| 1915 | 52 days |
| 1916 | 36 days |
| 1917 | 23 days |
| 1918 | 21 days |
| 1919 | 35 days |
| 1920 | 22 days |
| 1921 | 48 days |
| 1922 | 62 days |
| 1923 | 65 days |
| 1924 | 145 days |
| 1925 | 63 days |
| 1926 | 110 days |
| 1927 | 140 days |
| 1928 | 148 days |
| 1929 | 174 days |
| 1930 | 102 days |
| 1931 | 127 days |
| 1932 | 95 days |
| 1933 | 130 days |
| 1934 | 82 days |
| 1935 | 118 days |
| 1936 | 115 days |
| 1937 | 69 days |
| 1938 | 149 days |
| 1939 | 131 days |
| 1940 | 96 days |
| 1941 | 67 days |
| 1942 | 137 days |
| 1943 | 146 days |
| 1944 | 117 days |
| 1945 | 143 days |
| 1946 | 59 days |
| 1947 | 120 days |
| 1948 | 102 days |
| 1949 | 89 days |
| 1950 | 154 days |
| 1951 | 142 days |
| 1952 | 135 days |
| 1953 | 83 days |
| 1954 | 39 days |
| 1955 | 85 days |
| 1956 | 48 days |
| 1957 | 108 days |
| 1958 | 81 days |
| 1959 | 88 days |
| 1960 | 95 days |
| 1961 | 37 days |
| 1962 | 74 days |
| 1963 | 151 days |
| 1964 | 90 days |
| 1965 | 111 days |
| 1966 | 53 days |
| 1967 | 106 days |
| 1968 | 85 days |
| 1969 | 120 days |
| 1970 | 130 days |
| 1971 | 121 days |
| 1972 | 108 days |
| 1973 | 118 days |
| 1974 | 82 days |
| 1975 | 72 days |
| 1976 | 66 days |
| 1977 | 112 days |
| 1978 | 115 days |
| 1979 | 23 days |
| 1980 | 16 days |
| 1981 | 85 days |
| 1982 | 75 days |
| 1983 | 104 days |
| 1984 | 79 days |
| 1985 | 68 days |
| 1986 | 76 days |
| 1987 | 37 days |
| 1988 | 73 days |
| 1989 | 102 days |
| 1990 | 113 days |
| 1991 | 72 days |
| 1992 | 48 days |
| 1993 | 118 days |
| 1994 | 138 days |
| 1995 | 137 days |
| 1996 | 149 days |
| 1997 | 76 days |
| 1998 | 61 days |
| 1999 | 119 days |
| 2000 | 123 days |
| 2001 | 157 days |
| 2002 | 169 days |
| 2003 | 110 days |
| 2004 | 158 days |
| 2005 | 118 days |
| 2006 | 136 days |
| 2007 | 70 days |
| 2008 | 106 days |
| 2009 | 117 days |
| 2010 | 108 days |
| 2011 | 62 days |
| 2012 | 30 days |
| 2013 | 66 days |
| 2014 | 139 days |
| 2015 | 97 days |
| 2016 | 134 days |
| 2017 | 147 days |
| 2018 | 128 days |
| 2019 | 228 days |
| 2020 | 167 days |
| 2021 | 174 days |
| 2022 | 123 days |
| 2023 | 23 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
86 years with a frostAcross 86 years with a frost, the median last spring frost at Saint Helena falls on 28 March and the median first autumn frost on 13 November, which leaves a median of 234 days between them.
In 1969 to 2018 the median growing season was 274 days. That is 57 days more than in 1908 to 1941.
Fitted over all years, the growing season changes by +8.0 days per decade at this station.
| Measure | Median, all years | Earliest period (1908 to 1941) | Recent period (1969 to 2018) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 28 March | 1 April | 2 March | 30 days earlier | -5.0 days per decade |
| First autumn frost | 13 November | 4 November | 26 November | 22 days later | +3.0 days per decade |
| Growing days | 234 days | 217 days | 274 days | 57 days more | +8.0 days per decade |
A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.
Rainfall Return Levels
89 years, 1909 to 2020A day with at least 79.5 mm (3.1 in) of rain is expected about once in 2 years. A day with at least 177.8 mm (7.0 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 79.5 mm (3.1 in) | |
| 5 years | 108.6 mm (4.3 in) | |
| 10 years | 126.7 mm (5.0 in) | |
| 25 years | 148.3 mm (5.8 in) | |
| 50 years | 163.5 mm (6.4 in) | |
| 100 years | 177.8 mm (7.0 in) | Longer than the 89 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, 89 years of values from 1909 to 2020.
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: 177.8 mm (7.0 in) in 1913; 173.5 mm (6.8 in) in 1967; 162.6 mm (6.4 in) in 1995.
Station Changes
2 suspected2 changes were suspected in the annual mean temperature of Saint Helena, at 1969 and 1997. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1969 ran 0.2 C (0.3 F) lower than in the years before (possible change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1997 ran 0.3 C (0.5 F) higher than in the years before (possible change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1969 | -0.2 | -0.3 | possible | 5 |
| 1997 | +0.3 | +0.5 | 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
2001 to 2018 against 1961 to 1990Over 2001 to 2018, Saint Helena had a mean temperature of 16.3 C (61.4 F) and 773.8 mm (30.5 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Lisboa Geofisica (Portugal, 9,063 km away), Beja (Portugal, 9,198 km away) and Coimbra (Portugal, 8,995 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Lisboa Geofisica | Portugal | 9,063 km (5,631 mi) | 16.8 C (62.3 F) | 750.0 mm (29.5 in) | 1.04 |
| Beja | Portugal | 9,198 km (5,715 mi) | 16.2 C (61.1 F) | 586.1 mm (23.1 in) | 1.27 |
| Coimbra | Portugal | 8,995 km (5,589 mi) | 15.6 C (60.2 F) | 984.2 mm (38.7 in) | 1.28 |
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 2026-10-12 (12 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2025-12-31).