Graton Weather Records (USC00043578)
Record envelope, standing records and threshold days for Graton (USC00043578), California, United States, with 101 years of record.
Key Facts for Graton
- Graton (USC00043578) is a weather station in California, United States at 38.43 latitude and -122.86 longitude, 61 m (200 ft) above sea level.
- The station reports from 1926 to 2026, 101 years of record.
- 1,464 records set at Graton still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Graton set a daily record high minimum temperature of 11.1 C (52.0 F) on 10 April 2026.
About the Station
- Location: California, United States, 38.43 latitude, -122.86 longitude.
- Elevation: 61 m (200 ft).
- Period of record: 1926 to 2026, 101 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 | 28.9 C (84.0 F) | -7.8 C (18.0 F) | 22.2 C (72.0 F) | -1.7 C (28.9 F) |
| Feb | 31.1 C (88.0 F) | -8.3 C (17.1 F) | 27.2 C (81.0 F) | -1.7 C (28.9 F) |
| Mar | 33.9 C (93.0 F) | -3.9 C (25.0 F) | 33.9 C (93.0 F) | 2.2 C (36.0 F) |
| Apr | 36.7 C (98.1 F) | -3.9 C (25.0 F) | 29.4 C (84.9 F) | 1.7 C (35.1 F) |
| May | 39.4 C (102.9 F) | -1.7 C (28.9 F) | 32.2 C (90.0 F) | 6.1 C (43.0 F) |
| Jun | 42.2 C (108.0 F) | 0.6 C (33.1 F) | 37.8 C (100.0 F) | 5.6 C (42.1 F) |
| Jul | 45.0 C (113.0 F) | 3.3 C (37.9 F) | 38.9 C (102.0 F) | 6.7 C (44.1 F) |
| Aug | 42.8 C (109.0 F) | 1.7 C (35.1 F) | 37.2 C (99.0 F) | 6.7 C (44.1 F) |
| Sep | 46.1 C (115.0 F) | -2.2 C (28.0 F) | 34.4 C (93.9 F) | 7.2 C (45.0 F) |
| Oct | 41.1 C (106.0 F) | -5.6 C (21.9 F) | 36.1 C (97.0 F) | 10.0 C (50.0 F) |
| Nov | 33.3 C (91.9 F) | -6.7 C (19.9 F) | n/a | n/a |
| Dec | 27.2 C (81.0 F) | -10.0 C (14.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1926 | 25 |
| 1927 | 12 |
| 1928 | 16 |
| 1929 | 32 |
| 1930 | 13 |
| 1931 | 17 |
| 1932 | 24 |
| 1933 | 8 |
| 1934 | 16 |
| 1935 | 16 |
| 1936 | 19 |
| 1937 | 22 |
| 1938 | 10 |
| 1939 | 20 |
| 1940 | 16 |
| 1941 | 12 |
| 1942 | 6 |
| 1943 | 9 |
| 1944 | 12 |
| 1945 | 11 |
| 1946 | 11 |
| 1947 | 10 |
| 1948 | 22 |
| 1949 | 27 |
| 1950 | 29 |
| 1951 | 13 |
| 1952 | 16 |
| 1953 | 17 |
| 1954 | 9 |
| 1955 | 20 |
| 1956 | 11 |
| 1957 | 19 |
| 1958 | 14 |
| 1959 | 14 |
| 1960 | 13 |
| 1961 | 15 |
| 1962 | 14 |
| 1963 | 19 |
| 1964 | 13 |
| 1965 | 19 |
| 1966 | 19 |
| 1967 | 17 |
| 1968 | 8 |
| 1969 | 12 |
| 1970 | 22 |
| 1971 | 20 |
| 1972 | 30 |
| 1973 | 25 |
| 1974 | 10 |
| 1975 | 17 |
| 1976 | 19 |
| 1977 | 17 |
| 1978 | 11 |
| 1979 | 9 |
| 1980 | 8 |
| 1981 | 14 |
| 1982 | 6 |
| 1983 | 9 |
| 1984 | 17 |
| 1985 | 23 |
| 1986 | 9 |
| 1987 | 14 |
| 1988 | 15 |
| 1989 | 21 |
| 1990 | 23 |
| 1991 | 12 |
| 1992 | 5 |
| 1993 | 13 |
| 1994 | 4 |
| 1995 | 11 |
| 1996 | 15 |
| 1997 | 9 |
| 1998 | 6 |
| 1999 | 16 |
| 2000 | 14 |
| 2001 | 8 |
| 2002 | 12 |
| 2003 | 8 |
| 2004 | 8 |
| 2005 | 7 |
| 2006 | 13 |
| 2007 | 14 |
| 2008 | 13 |
| 2009 | 19 |
| 2010 | 16 |
| 2011 | 16 |
| 2012 | 14 |
| 2013 | 17 |
| 2014 | 12 |
| 2015 | 22 |
| 2016 | 8 |
| 2017 | 14 |
| 2018 | 8 |
| 2019 | 11 |
| 2020 | 19 |
| 2021 | 7 |
| 2022 | 20 |
| 2023 | 11 |
| 2024 | 6 |
| 2025 | 5 |
| 2026 | 15 |
All-Time Record Progression
9 new records| Date | Kind | Detail |
|---|---|---|
| 1961-09-03 | Record high minimum temperature | Record high minimum temperature 21.7 C (71.1 F) |
| 1971-09-14 | Record high maximum temperature | Record high maximum temperature 43.3 C (109.9 F) |
| 1971-09-15 | Record high maximum temperature | Record high maximum temperature 44.4 C (111.9 F) |
| 1972-07-14 | Record high maximum temperature | Record high maximum temperature 45.0 C (113.0 F) |
| 1972-12-09 | Record low minimum temperature | Record low minimum temperature -9.4 C (15.1 F) |
| 1972-12-15 | Record low maximum temperature | Record low maximum temperature 1.1 C (34.0 F) |
| 1990-12-22 | Record low minimum temperature | Record low minimum temperature -10.0 C (14.0 F) |
| 2020-09-06 | Record high maximum temperature | Record high maximum temperature 45.6 C (114.1 F) |
| 2022-09-06 | Record high maximum temperature | Record high maximum temperature 46.1 C (115.0 F) |
Wettest Day of Each Month
Feb: 176.5 mm (6.9 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 145.3 mm (5.7 in) | 4 January 1982 |
| Feb | 176.5 mm (6.9 in) | 4 February 1937 |
| Mar | 164.8 mm (6.5 in) | 9 March 1995 |
| Apr | 101.6 mm (4.0 in) | 27 April 1953 |
| May | 59.2 mm (2.3 in) | 16 May 1996 |
| Jun | 53.8 mm (2.1 in) | 2 June 1967 |
| Jul | 31.2 mm (1.2 in) | 8 July 1974 |
| Aug | 43.4 mm (1.7 in) | 28 August 1954 |
| Sep | 106.2 mm (4.2 in) | 18 September 1959 |
| Oct | 156.7 mm (6.2 in) | 25 October 2021 |
| Nov | 140.7 mm (5.5 in) | 22 November 1977 |
| Dec | 170.2 mm (6.7 in) | 19 December 1981 |
Period of Record Coverage
1926 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1926 | 364 | 100% | Yes |
| 1927 | 365 | 100% | Yes |
| 1928 | 366 | 100% | Yes |
| 1929 | 365 | 100% | Yes |
| 1930 | 365 | 100% | Yes |
| 1931 | 364 | 100% | Yes |
| 1932 | 365 | 100% | Yes |
| 1933 | 364 | 100% | Yes |
| 1934 | 365 | 100% | Yes |
| 1935 | 365 | 100% | Yes |
| 1936 | 360 | 98% | Yes |
| 1937 | 365 | 100% | Yes |
| 1938 | 362 | 99% | Yes |
| 1939 | 363 | 99% | Yes |
| 1940 | 366 | 100% | Yes |
| 1941 | 364 | 100% | Yes |
| 1942 | 365 | 100% | Yes |
| 1943 | 363 | 99% | Yes |
| 1944 | 363 | 99% | Yes |
| 1945 | 364 | 100% | Yes |
| 1946 | 364 | 100% | Yes |
| 1947 | 362 | 99% | Yes |
| 1948 | 365 | 100% | Yes |
| 1949 | 364 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 357 | 98% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 351 | 96% | Yes |
| 1955 | 364 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 364 | 100% | Yes |
| 1958 | 364 | 100% | Yes |
| 1959 | 357 | 98% | Yes |
| 1960 | 364 | 99% | Yes |
| 1961 | 364 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 362 | 99% | Yes |
| 1964 | 363 | 99% | Yes |
| 1965 | 363 | 99% | Yes |
| 1966 | 362 | 99% | Yes |
| 1967 | 360 | 99% | Yes |
| 1968 | 344 | 94% | 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 | 365 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 365 | 100% | Yes |
| 1983 | 365 | 100% | Yes |
| 1984 | 366 | 100% | Yes |
| 1985 | 365 | 100% | Yes |
| 1986 | 365 | 100% | Yes |
| 1987 | 365 | 100% | Yes |
| 1988 | 366 | 100% | Yes |
| 1989 | 365 | 100% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 366 | 100% | Yes |
| 1993 | 364 | 100% | Yes |
| 1994 | 365 | 100% | Yes |
| 1995 | 365 | 100% | Yes |
| 1996 | 366 | 100% | Yes |
| 1997 | 365 | 100% | Yes |
| 1998 | 364 | 100% | Yes |
| 1999 | 365 | 100% | Yes |
| 2000 | 365 | 100% | Yes |
| 2001 | 364 | 100% | Yes |
| 2002 | 365 | 100% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 366 | 100% | Yes |
| 2005 | 364 | 100% | Yes |
| 2006 | 364 | 100% | Yes |
| 2007 | 364 | 100% | Yes |
| 2008 | 365 | 100% | Yes |
| 2009 | 364 | 100% | Yes |
| 2010 | 363 | 99% | Yes |
| 2011 | 364 | 100% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 364 | 100% | Yes |
| 2015 | 365 | 100% | Yes |
| 2016 | 366 | 100% | Yes |
| 2017 | 365 | 100% | Yes |
| 2018 | 365 | 100% | Yes |
| 2019 | 357 | 98% | Yes |
| 2020 | 365 | 100% | Yes |
| 2021 | 365 | 100% | Yes |
| 2022 | 365 | 100% | Yes |
| 2023 | 328 | 90% | No |
| 2024 | 265 | 72% | No |
| 2025 | 365 | 100% | Yes |
| 2026 | 249 | 68% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 10 April 2026 | Graton, US | daily high min | 11.1 C (52.0 F) | 0.5 C (0.9 F) | 84 years | 36 of 100 (Notable) |
| 31 March 2026 | Graton, US | daily high min | 11.7 C (53.1 F) | 0.6 C (1.1 F) | 100 years | 41 of 100 (Notable) |
| 29 March 2026 | Graton, US | daily high max | 30.6 C (87.1 F) | 0.6 C (1.1 F) | 8 years | 13 of 100 (Routine) |
| 24 March 2026 | Graton, US | daily high max (Tie) | 30.0 C (86.0 F) | tie | 100 years | 10 of 100 (Routine) |
| 23 March 2026 | Graton, US | daily high max (Tie) | 28.3 C (82.9 F) | tie | 100 years | 10 of 100 (Routine) |
| 21 March 2026 | Graton, US | daily high max | 32.2 C (90.0 F) | 2.8 C (5.0 F) | 21 years | 22 of 100 (Routine) |
| 20 March 2026 | Graton, US | monthly high max (Tie) | 33.9 C (93.0 F) | tie | 0 years | 5 of 100 (Routine) |
| 19 March 2026 | Graton, US | monthly high max | 33.9 C (93.0 F) | 0.6 C (1.1 F) | 0 years | 21 of 100 (Routine) |
| 18 March 2026 | Graton, US | daily high max | 32.8 C (91.0 F) | 1.7 C (3.1 F) | 21 years | 19 of 100 (Routine) |
| 17 March 2026 | Graton, US | monthly high max | 33.3 C (91.9 F) | 0.5 C (0.9 F) | 0 years | 21 of 100 (Routine) |
| 16 March 2026 | Graton, US | monthly high max | 32.8 C (91.0 F) | 0.6 C (1.1 F) | 37 years | 32 of 100 (Routine) |
| 15 March 2026 | Graton, US | daily high max | 31.1 C (88.0 F) | 2.2 C (4.0 F) | 21 years | 21 of 100 (Routine) |
| 8 March 2026 | Graton, US | daily high max | 27.8 C (82.0 F) | 1.1 C (2.0 F) | 92 years | 39 of 100 (Notable) |
| 7 March 2026 | Graton, US | daily high max | 27.2 C (81.0 F) | 0.5 C (0.9 F) | 92 years | 38 of 100 (Notable) |
| 7 March 2026 | Graton, US | daily high min | 13.3 C (55.9 F) | 1.1 C (2.0 F) | 65 years | 32 of 100 (Routine) |
| 27 February 2026 | Graton, US | daily high max | 27.2 C (81.0 F) | 0.5 C (0.9 F) | 94 years | 39 of 100 (Notable) |
| 17 February 2026 | Graton, US | daily low max | 8.9 C (48.0 F) | 0.5 C (0.9 F) | 28 years | 19 of 100 (Routine) |
| 21 December 2025 | Graton, US | daily high min | 13.9 C (57.0 F) | 0.6 C (1.1 F) | 70 years | 32 of 100 (Routine) |
| 19 December 2025 | Graton, US | daily high min (Tie) | 11.1 C (52.0 F) | tie | 70 years | 7 of 100 (Routine) |
| 13 November 2025 | Graton, US | daily high min (Tie) | 12.8 C (55.0 F) | tie | 59 years | 6 of 100 (Routine) |
Climate Trend
95 complete years, 1926 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1926 | 14.6 C | +0.64 C |
| 1928 | 13.8 C | -0.13 C |
| 1929 | 13.5 C | -0.44 C |
| 1930 | 14.1 C | +0.18 C |
| 1931 | 14.4 C | +0.44 C |
| 1932 | 13.9 C | -0.01 C |
| 1933 | 13.5 C | -0.39 C |
| 1934 | 15.0 C | +1.06 C |
| 1935 | 13.7 C | -0.23 C |
| 1936 | 14.8 C | +0.84 C |
| 1937 | 13.9 C | +0.01 C |
| 1938 | 13.8 C | -0.09 C |
| 1939 | 14.6 C | +0.66 C |
| 1940 | 14.8 C | +0.88 C |
| 1941 | 14.8 C | +0.83 C |
| 1942 | 14.0 C | +0.08 C |
| 1943 | 14.3 C | +0.34 C |
| 1944 | 13.4 C | -0.58 C |
| 1945 | 13.6 C | -0.36 C |
| 1946 | 12.8 C | -1.11 C |
| 1947 | 13.6 C | -0.36 C |
| 1948 | 12.4 C | -1.53 C |
| 1949 | 12.8 C | -1.12 C |
| 1950 | 13.5 C | -0.46 C |
| 1951 | 12.8 C | -1.12 C |
| 1952 | 12.9 C | -1.01 C |
| 1953 | 13.4 C | -0.50 C |
| 1955 | 12.8 C | -1.12 C |
| 1956 | 12.9 C | -1.03 C |
| 1957 | 13.2 C | -0.70 C |
| 1958 | 14.2 C | +0.27 C |
| 1959 | 14.4 C | +0.48 C |
| 1960 | 13.6 C | -0.33 C |
| 1961 | 13.7 C | -0.28 C |
| 1962 | 13.2 C | -0.71 C |
| 1963 | 13.2 C | -0.78 C |
| 1964 | 13.5 C | -0.46 C |
| 1965 | 13.0 C | -0.93 C |
| 1966 | 13.7 C | -0.21 C |
| 1967 | 13.5 C | -0.41 C |
| 1969 | 13.5 C | -0.45 C |
| 1970 | 13.7 C | -0.23 C |
| 1971 | 13.1 C | -0.83 C |
| 1972 | 13.2 C | -0.75 C |
| 1973 | 13.7 C | -0.27 C |
| 1974 | 13.3 C | -0.62 C |
| 1975 | 12.7 C | -1.23 C |
| 1976 | 13.7 C | -0.28 C |
| 1977 | 13.9 C | -0.03 C |
| 1978 | 14.3 C | +0.34 C |
| 1979 | 14.0 C | +0.03 C |
| 1980 | 13.7 C | -0.23 C |
| 1981 | 14.4 C | +0.45 C |
| 1982 | 13.2 C | -0.77 C |
| 1983 | 14.5 C | +0.54 C |
| 1984 | 14.3 C | +0.32 C |
| 1985 | 13.3 C | -0.63 C |
| 1986 | 14.1 C | +0.17 C |
| 1987 | 14.0 C | +0.02 C |
| 1988 | 14.2 C | +0.25 C |
| 1989 | 13.5 C | -0.46 C |
| 1990 | 13.9 C | -0.07 C |
| 1991 | 13.8 C | -0.16 C |
| 1992 | 14.4 C | +0.51 C |
| 1993 | 14.0 C | +0.03 C |
| 1994 | 13.4 C | -0.56 C |
| 1995 | 14.7 C | +0.73 C |
| 1996 | 14.5 C | +0.58 C |
| 1997 | 14.7 C | +0.75 C |
| 1998 | 13.4 C | -0.49 C |
| 1999 | 13.2 C | -0.69 C |
| 2000 | 13.8 C | -0.13 C |
| 2001 | 14.1 C | +0.20 C |
| 2002 | 14.1 C | +0.15 C |
| 2003 | 14.4 C | +0.47 C |
| 2004 | 14.7 C | +0.81 C |
| 2005 | 14.2 C | +0.26 C |
| 2006 | 13.8 C | -0.13 C |
| 2007 | 14.1 C | +0.21 C |
| 2008 | 14.1 C | +0.12 C |
| 2009 | 14.0 C | +0.03 C |
| 2010 | 13.8 C | -0.10 C |
| 2011 | 13.7 C | -0.21 C |
| 2012 | 14.2 C | +0.25 C |
| 2013 | 14.4 C | +0.43 C |
| 2014 | 15.5 C | +1.59 C |
| 2015 | 15.5 C | +1.60 C |
| 2016 | 14.9 C | +0.93 C |
| 2017 | 14.9 C | +1.01 C |
| 2018 | 14.7 C | +0.72 C |
| 2019 | 14.9 C | +0.96 C |
| 2020 | 15.5 C | +1.61 C |
| 2021 | 14.7 C | +0.73 C |
| 2022 | 15.1 C | +1.20 C |
| 2025 | 14.5 C | +0.55 C |
The annual mean temperature here has risen by 0.09 C (0.05 to 0.14) per decade over 1926 to 2025. In Fahrenheit: 0.2 F (0.1 to 0.2) per decade. The slope is a straight line fitted to 95 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.09 C (0.05 to 0.14) per decade | 0.2 F (0.1 to 0.2) per decade | 1926 to 2025 | 95 | Rise |
| Mean daily maximum | 0.2 C (0.1 to 0.3) per decade | 0.4 F (0.2 to 0.5) per decade | 1926 to 2025 | 95 | Rise |
| Mean daily minimum | -0.02 C (-0.07 to 0.04) per decade | -0.03 F (-0.12 to 0.06) per decade | 1926 to 2025 | 95 | Not clearly different from zero |
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
1926 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 46.1 C (115.0 F) | 2022 | 39.4 C (102.9 F) | 101 |
| Coldest night (TNn) | -10.0 C (14.0 F) | 1990 | -4.4 C (24.1 F) | 101 |
| Wettest day (Rx1day) | 176.5 mm (6.9 in) | 1937 | 87.9 mm (3.5 in) | 101 |
| Wettest five days (Rx5day) | 389.1 mm (15.3 in) | 2021 | 175.8 mm (6.9 in) | 101 |
| Longest dry spell (CDD) | 170 days | 2012 | 110 days | 101 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1926 | 39.4 C (102.9 F) |
| 1927 | 36.1 C (97.0 F) |
| 1928 | 41.1 C (106.0 F) |
| 1929 | 37.8 C (100.0 F) |
| 1930 | 38.3 C (100.9 F) |
| 1931 | 42.8 C (109.0 F) |
| 1932 | 42.8 C (109.0 F) |
| 1933 | 40.0 C (104.0 F) |
| 1934 | 40.6 C (105.1 F) |
| 1935 | 38.9 C (102.0 F) |
| 1936 | 41.1 C (106.0 F) |
| 1937 | 38.3 C (100.9 F) |
| 1938 | 38.3 C (100.9 F) |
| 1939 | 42.2 C (108.0 F) |
| 1940 | 38.9 C (102.0 F) |
| 1941 | 38.9 C (102.0 F) |
| 1942 | 38.3 C (100.9 F) |
| 1943 | 41.1 C (106.0 F) |
| 1944 | 41.7 C (107.1 F) |
| 1945 | 36.7 C (98.1 F) |
| 1946 | 39.4 C (102.9 F) |
| 1947 | 37.2 C (99.0 F) |
| 1948 | 36.7 C (98.1 F) |
| 1949 | 38.3 C (100.9 F) |
| 1950 | 41.7 C (107.1 F) |
| 1951 | 37.8 C (100.0 F) |
| 1952 | 37.8 C (100.0 F) |
| 1953 | 36.7 C (98.1 F) |
| 1954 | 39.4 C (102.9 F) |
| 1955 | 40.0 C (104.0 F) |
| 1956 | 36.1 C (97.0 F) |
| 1957 | 37.8 C (100.0 F) |
| 1958 | 36.7 C (98.1 F) |
| 1959 | 42.8 C (109.0 F) |
| 1960 | 40.6 C (105.1 F) |
| 1961 | 41.1 C (106.0 F) |
| 1962 | 37.2 C (99.0 F) |
| 1963 | 36.1 C (97.0 F) |
| 1964 | 38.3 C (100.9 F) |
| 1965 | 35.0 C (95.0 F) |
| 1966 | 38.3 C (100.9 F) |
| 1967 | 37.8 C (100.0 F) |
| 1968 | 39.4 C (102.9 F) |
| 1969 | 39.4 C (102.9 F) |
| 1970 | 40.6 C (105.1 F) |
| 1971 | 44.4 C (111.9 F) |
| 1972 | 45.0 C (113.0 F) |
| 1973 | 41.1 C (106.0 F) |
| 1974 | 38.3 C (100.9 F) |
| 1975 | 38.3 C (100.9 F) |
| 1976 | 42.2 C (108.0 F) |
| 1977 | 42.2 C (108.0 F) |
| 1978 | 38.3 C (100.9 F) |
| 1979 | 42.8 C (109.0 F) |
| 1980 | 41.1 C (106.0 F) |
| 1981 | 42.2 C (108.0 F) |
| 1982 | 38.9 C (102.0 F) |
| 1983 | 40.6 C (105.1 F) |
| 1984 | 41.7 C (107.1 F) |
| 1985 | 42.2 C (108.0 F) |
| 1986 | 37.8 C (100.0 F) |
| 1987 | 38.9 C (102.0 F) |
| 1988 | 43.3 C (109.9 F) |
| 1989 | 40.6 C (105.1 F) |
| 1990 | 38.3 C (100.9 F) |
| 1991 | 39.4 C (102.9 F) |
| 1992 | 37.8 C (100.0 F) |
| 1993 | 40.0 C (104.0 F) |
| 1994 | 37.8 C (100.0 F) |
| 1995 | 39.4 C (102.9 F) |
| 1996 | 40.0 C (104.0 F) |
| 1997 | 37.2 C (99.0 F) |
| 1998 | 40.6 C (105.1 F) |
| 1999 | 37.8 C (100.0 F) |
| 2000 | 41.1 C (106.0 F) |
| 2001 | 38.3 C (100.9 F) |
| 2002 | 38.9 C (102.0 F) |
| 2003 | 39.4 C (102.9 F) |
| 2004 | 38.3 C (100.9 F) |
| 2005 | 38.9 C (102.0 F) |
| 2006 | 41.1 C (106.0 F) |
| 2007 | 38.9 C (102.0 F) |
| 2008 | 40.6 C (105.1 F) |
| 2009 | 40.0 C (104.0 F) |
| 2010 | 42.2 C (108.0 F) |
| 2011 | 38.9 C (102.0 F) |
| 2012 | 41.1 C (106.0 F) |
| 2013 | 37.2 C (99.0 F) |
| 2014 | 38.9 C (102.0 F) |
| 2015 | 40.6 C (105.1 F) |
| 2016 | 38.9 C (102.0 F) |
| 2017 | 44.4 C (111.9 F) |
| 2018 | 38.3 C (100.9 F) |
| 2019 | 40.0 C (104.0 F) |
| 2020 | 45.6 C (114.1 F) |
| 2021 | 40.0 C (104.0 F) |
| 2022 | 46.1 C (115.0 F) |
| 2023 | 37.8 C (100.0 F) |
| 2024 | 41.1 C (106.0 F) |
| 2025 | 38.9 C (102.0 F) |
| 2026 | 38.9 C (102.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1926 | -3.3 C (26.1 F) |
| 1927 | -2.2 C (28.0 F) |
| 1928 | -4.4 C (24.1 F) |
| 1929 | -5.0 C (23.0 F) |
| 1930 | -5.6 C (21.9 F) |
| 1931 | -3.9 C (25.0 F) |
| 1932 | -8.3 C (17.1 F) |
| 1933 | -5.0 C (23.0 F) |
| 1934 | -1.1 C (30.0 F) |
| 1935 | -3.3 C (26.1 F) |
| 1936 | -3.9 C (25.0 F) |
| 1937 | -7.8 C (18.0 F) |
| 1938 | -3.3 C (26.1 F) |
| 1939 | -3.3 C (26.1 F) |
| 1940 | -4.4 C (24.1 F) |
| 1941 | -2.2 C (28.0 F) |
| 1942 | -3.9 C (25.0 F) |
| 1943 | -5.0 C (23.0 F) |
| 1944 | -1.7 C (28.9 F) |
| 1945 | -3.9 C (25.0 F) |
| 1946 | -3.9 C (25.0 F) |
| 1947 | -5.0 C (23.0 F) |
| 1948 | -6.1 C (21.0 F) |
| 1949 | -6.7 C (19.9 F) |
| 1950 | -5.6 C (21.9 F) |
| 1951 | -4.4 C (24.1 F) |
| 1952 | -5.0 C (23.0 F) |
| 1953 | -3.9 C (25.0 F) |
| 1954 | -3.9 C (25.0 F) |
| 1955 | -3.9 C (25.0 F) |
| 1956 | -4.4 C (24.1 F) |
| 1957 | -5.0 C (23.0 F) |
| 1958 | -3.3 C (26.1 F) |
| 1959 | -3.9 C (25.0 F) |
| 1960 | -5.6 C (21.9 F) |
| 1961 | -5.6 C (21.9 F) |
| 1962 | -5.6 C (21.9 F) |
| 1963 | -6.1 C (21.0 F) |
| 1964 | -2.8 C (27.0 F) |
| 1965 | -5.0 C (23.0 F) |
| 1966 | -4.4 C (24.1 F) |
| 1967 | -6.7 C (19.9 F) |
| 1968 | -6.1 C (21.0 F) |
| 1969 | -3.9 C (25.0 F) |
| 1970 | -4.4 C (24.1 F) |
| 1971 | -5.6 C (21.9 F) |
| 1972 | -9.4 C (15.1 F) |
| 1973 | -6.1 C (21.0 F) |
| 1974 | -4.4 C (24.1 F) |
| 1975 | -6.7 C (19.9 F) |
| 1976 | -6.1 C (21.0 F) |
| 1977 | -4.4 C (24.1 F) |
| 1978 | -6.7 C (19.9 F) |
| 1979 | -6.1 C (21.0 F) |
| 1980 | -6.1 C (21.0 F) |
| 1981 | -1.7 C (28.9 F) |
| 1982 | -5.0 C (23.0 F) |
| 1983 | -3.3 C (26.1 F) |
| 1984 | -3.3 C (26.1 F) |
| 1985 | -5.6 C (21.9 F) |
| 1986 | -6.7 C (19.9 F) |
| 1987 | -6.7 C (19.9 F) |
| 1988 | -3.9 C (25.0 F) |
| 1989 | -8.3 C (17.1 F) |
| 1990 | -10.0 C (14.0 F) |
| 1991 | -6.7 C (19.9 F) |
| 1992 | -3.3 C (26.1 F) |
| 1993 | -5.0 C (23.0 F) |
| 1994 | -4.4 C (24.1 F) |
| 1995 | -2.2 C (28.0 F) |
| 1996 | -2.8 C (27.0 F) |
| 1997 | -5.0 C (23.0 F) |
| 1998 | -7.8 C (18.0 F) |
| 1999 | -2.8 C (27.0 F) |
| 2000 | -3.3 C (26.1 F) |
| 2001 | -5.0 C (23.0 F) |
| 2002 | -4.4 C (24.1 F) |
| 2003 | -3.9 C (25.0 F) |
| 2004 | -3.9 C (25.0 F) |
| 2005 | -3.3 C (26.1 F) |
| 2006 | -5.6 C (21.9 F) |
| 2007 | -7.2 C (19.0 F) |
| 2008 | -5.0 C (23.0 F) |
| 2009 | -7.8 C (18.0 F) |
| 2010 | -3.3 C (26.1 F) |
| 2011 | -5.0 C (23.0 F) |
| 2012 | -6.7 C (19.9 F) |
| 2013 | -7.8 C (18.0 F) |
| 2014 | -5.6 C (21.9 F) |
| 2015 | -6.7 C (19.9 F) |
| 2016 | -5.0 C (23.0 F) |
| 2017 | -4.4 C (24.1 F) |
| 2018 | -3.9 C (25.0 F) |
| 2019 | -2.8 C (27.0 F) |
| 2020 | -3.3 C (26.1 F) |
| 2021 | -3.3 C (26.1 F) |
| 2022 | -3.3 C (26.1 F) |
| 2023 | -3.3 C (26.1 F) |
| 2024 | -2.8 C (27.0 F) |
| 2025 | -3.3 C (26.1 F) |
| 2026 | -1.7 C (28.9 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1926 | 120.7 mm (4.8 in) |
| 1927 | 91.4 mm (3.6 in) |
| 1928 | 83.8 mm (3.3 in) |
| 1929 | 102.6 mm (4.0 in) |
| 1930 | 82.3 mm (3.2 in) |
| 1931 | 103.4 mm (4.1 in) |
| 1932 | 79.0 mm (3.1 in) |
| 1933 | 86.4 mm (3.4 in) |
| 1934 | 61.5 mm (2.4 in) |
| 1935 | 96.5 mm (3.8 in) |
| 1936 | 67.6 mm (2.7 in) |
| 1937 | 176.5 mm (6.9 in) |
| 1938 | 57.2 mm (2.3 in) |
| 1939 | 51.3 mm (2.0 in) |
| 1940 | 121.2 mm (4.8 in) |
| 1941 | 78.7 mm (3.1 in) |
| 1942 | 82.8 mm (3.3 in) |
| 1943 | 111.3 mm (4.4 in) |
| 1944 | 90.9 mm (3.6 in) |
| 1945 | 142.2 mm (5.6 in) |
| 1946 | 63.2 mm (2.5 in) |
| 1947 | 49.3 mm (1.9 in) |
| 1948 | 56.6 mm (2.2 in) |
| 1949 | 59.7 mm (2.4 in) |
| 1950 | 157.7 mm (6.2 in) |
| 1951 | 112.3 mm (4.4 in) |
| 1952 | 139.2 mm (5.5 in) |
| 1953 | 101.6 mm (4.0 in) |
| 1954 | 105.4 mm (4.1 in) |
| 1955 | 132.1 mm (5.2 in) |
| 1956 | 85.9 mm (3.4 in) |
| 1957 | 108.0 mm (4.3 in) |
| 1958 | 84.6 mm (3.3 in) |
| 1959 | 106.2 mm (4.2 in) |
| 1960 | 87.9 mm (3.5 in) |
| 1961 | 62.2 mm (2.4 in) |
| 1962 | 114.3 mm (4.5 in) |
| 1963 | 107.2 mm (4.2 in) |
| 1964 | 63.5 mm (2.5 in) |
| 1965 | 63.5 mm (2.5 in) |
| 1966 | 97.8 mm (3.9 in) |
| 1967 | 130.0 mm (5.1 in) |
| 1968 | 68.6 mm (2.7 in) |
| 1969 | 94.7 mm (3.7 in) |
| 1970 | 100.1 mm (3.9 in) |
| 1971 | 54.6 mm (2.1 in) |
| 1972 | 64.8 mm (2.6 in) |
| 1973 | 125.7 mm (4.9 in) |
| 1974 | 76.2 mm (3.0 in) |
| 1975 | 111.8 mm (4.4 in) |
| 1976 | 51.8 mm (2.0 in) |
| 1977 | 140.7 mm (5.5 in) |
| 1978 | 69.3 mm (2.7 in) |
| 1979 | 137.9 mm (5.4 in) |
| 1980 | 114.6 mm (4.5 in) |
| 1981 | 170.2 mm (6.7 in) |
| 1982 | 145.3 mm (5.7 in) |
| 1983 | 100.6 mm (4.0 in) |
| 1984 | 50.5 mm (2.0 in) |
| 1985 | 104.1 mm (4.1 in) |
| 1986 | 125.5 mm (4.9 in) |
| 1987 | 91.2 mm (3.6 in) |
| 1988 | 88.1 mm (3.5 in) |
| 1989 | 64.5 mm (2.5 in) |
| 1990 | 63.2 mm (2.5 in) |
| 1991 | 100.6 mm (4.0 in) |
| 1992 | 79.2 mm (3.1 in) |
| 1993 | 80.3 mm (3.2 in) |
| 1994 | 84.1 mm (3.3 in) |
| 1995 | 164.8 mm (6.5 in) |
| 1996 | 108.7 mm (4.3 in) |
| 1997 | 89.7 mm (3.5 in) |
| 1998 | 95.3 mm (3.8 in) |
| 1999 | 106.2 mm (4.2 in) |
| 2000 | 58.9 mm (2.3 in) |
| 2001 | 57.9 mm (2.3 in) |
| 2002 | 108.0 mm (4.3 in) |
| 2003 | 69.9 mm (2.8 in) |
| 2004 | 84.1 mm (3.3 in) |
| 2005 | 113.8 mm (4.5 in) |
| 2006 | 81.0 mm (3.2 in) |
| 2007 | 61.0 mm (2.4 in) |
| 2008 | 88.9 mm (3.5 in) |
| 2009 | 70.9 mm (2.8 in) |
| 2010 | 137.2 mm (5.4 in) |
| 2011 | 55.9 mm (2.2 in) |
| 2012 | 96.5 mm (3.8 in) |
| 2013 | 48.5 mm (1.9 in) |
| 2014 | 95.3 mm (3.8 in) |
| 2015 | 61.0 mm (2.4 in) |
| 2016 | 58.9 mm (2.3 in) |
| 2017 | 65.8 mm (2.6 in) |
| 2018 | 51.1 mm (2.0 in) |
| 2019 | 76.5 mm (3.0 in) |
| 2020 | 28.4 mm (1.1 in) |
| 2021 | 156.7 mm (6.2 in) |
| 2022 | 83.8 mm (3.3 in) |
| 2023 | 76.2 mm (3.0 in) |
| 2024 | 127.5 mm (5.0 in) |
| 2025 | 68.3 mm (2.7 in) |
| 2026 | 17.8 mm (0.7 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1926 | 270.4 mm (10.6 in) |
| 1927 | 154.5 mm (6.1 in) |
| 1928 | 154.2 mm (6.1 in) |
| 1929 | 297.2 mm (11.7 in) |
| 1930 | 124.6 mm (4.9 in) |
| 1931 | 199.1 mm (7.8 in) |
| 1932 | 138.5 mm (5.5 in) |
| 1933 | 113.1 mm (4.5 in) |
| 1934 | 156.8 mm (6.2 in) |
| 1935 | 129.7 mm (5.1 in) |
| 1936 | 187.2 mm (7.4 in) |
| 1937 | 219.9 mm (8.7 in) |
| 1938 | 133.9 mm (5.3 in) |
| 1939 | 73.9 mm (2.9 in) |
| 1940 | 239.3 mm (9.4 in) |
| 1941 | 158.4 mm (6.2 in) |
| 1942 | 243.8 mm (9.6 in) |
| 1943 | 243.6 mm (9.6 in) |
| 1944 | 190.0 mm (7.5 in) |
| 1945 | 257.5 mm (10.1 in) |
| 1946 | 119.8 mm (4.7 in) |
| 1947 | 89.9 mm (3.5 in) |
| 1948 | 95.5 mm (3.8 in) |
| 1949 | 133.0 mm (5.2 in) |
| 1950 | 212.6 mm (8.4 in) |
| 1951 | 267.3 mm (10.5 in) |
| 1952 | 210.4 mm (8.3 in) |
| 1953 | 130.8 mm (5.1 in) |
| 1954 | 168.9 mm (6.6 in) |
| 1955 | 367.3 mm (14.5 in) |
| 1956 | 204.0 mm (8.0 in) |
| 1957 | 228.1 mm (9.0 in) |
| 1958 | 163.7 mm (6.4 in) |
| 1959 | 175.8 mm (6.9 in) |
| 1960 | 192.4 mm (7.6 in) |
| 1961 | 137.4 mm (5.4 in) |
| 1962 | 276.3 mm (10.9 in) |
| 1963 | 242.6 mm (9.6 in) |
| 1964 | 181.6 mm (7.1 in) |
| 1965 | 180.0 mm (7.1 in) |
| 1966 | 216.0 mm (8.5 in) |
| 1967 | 295.4 mm (11.6 in) |
| 1968 | 147.9 mm (5.8 in) |
| 1969 | 224.1 mm (8.8 in) |
| 1970 | 247.0 mm (9.7 in) |
| 1971 | 90.1 mm (3.5 in) |
| 1972 | 139.6 mm (5.5 in) |
| 1973 | 254.6 mm (10.0 in) |
| 1974 | 155.3 mm (6.1 in) |
| 1975 | 187.3 mm (7.4 in) |
| 1976 | 88.2 mm (3.5 in) |
| 1977 | 207.8 mm (8.2 in) |
| 1978 | 189.6 mm (7.5 in) |
| 1979 | 233.2 mm (9.2 in) |
| 1980 | 200.9 mm (7.9 in) |
| 1981 | 251.5 mm (9.9 in) |
| 1982 | 219.2 mm (8.6 in) |
| 1983 | 218.7 mm (8.6 in) |
| 1984 | 133.0 mm (5.2 in) |
| 1985 | 133.1 mm (5.2 in) |
| 1986 | 342.4 mm (13.5 in) |
| 1987 | 135.0 mm (5.3 in) |
| 1988 | 121.0 mm (4.8 in) |
| 1989 | 107.5 mm (4.2 in) |
| 1990 | 110.0 mm (4.3 in) |
| 1991 | 239.3 mm (9.4 in) |
| 1992 | 163.3 mm (6.4 in) |
| 1993 | 155.7 mm (6.1 in) |
| 1994 | 145.4 mm (5.7 in) |
| 1995 | 260.8 mm (10.3 in) |
| 1996 | 148.3 mm (5.8 in) |
| 1997 | 200.3 mm (7.9 in) |
| 1998 | 233.8 mm (9.2 in) |
| 1999 | 181.5 mm (7.1 in) |
| 2000 | 165.4 mm (6.5 in) |
| 2001 | 169.9 mm (6.7 in) |
| 2002 | 258.2 mm (10.2 in) |
| 2003 | 116.9 mm (4.6 in) |
| 2004 | 180.4 mm (7.1 in) |
| 2005 | 246.9 mm (9.7 in) |
| 2006 | 238.8 mm (9.4 in) |
| 2007 | 159.5 mm (6.3 in) |
| 2008 | 143.3 mm (5.6 in) |
| 2009 | 132.9 mm (5.2 in) |
| 2010 | 196.1 mm (7.7 in) |
| 2011 | 130.5 mm (5.1 in) |
| 2012 | 207.0 mm (8.1 in) |
| 2013 | 80.3 mm (3.2 in) |
| 2014 | 170.3 mm (6.7 in) |
| 2015 | 110.3 mm (4.3 in) |
| 2016 | 153.6 mm (6.0 in) |
| 2017 | 202.7 mm (8.0 in) |
| 2018 | 104.3 mm (4.1 in) |
| 2019 | 150.1 mm (5.9 in) |
| 2020 | 63.2 mm (2.5 in) |
| 2021 | 389.1 mm (15.3 in) |
| 2022 | 150.6 mm (5.9 in) |
| 2023 | 189.0 mm (7.4 in) |
| 2024 | 302.6 mm (11.9 in) |
| 2025 | 116.7 mm (4.6 in) |
| 2026 | 17.8 mm (0.7 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1926 | 146 days |
| 1927 | 89 days |
| 1928 | 148 days |
| 1929 | 68 days |
| 1930 | 102 days |
| 1931 | 127 days |
| 1932 | 144 days |
| 1933 | 123 days |
| 1934 | 122 days |
| 1935 | 100 days |
| 1936 | 80 days |
| 1937 | 77 days |
| 1938 | 122 days |
| 1939 | 113 days |
| 1940 | 96 days |
| 1941 | 69 days |
| 1942 | 89 days |
| 1943 | 104 days |
| 1944 | 88 days |
| 1945 | 128 days |
| 1946 | 59 days |
| 1947 | 120 days |
| 1948 | 99 days |
| 1949 | 98 days |
| 1950 | 114 days |
| 1951 | 88 days |
| 1952 | 124 days |
| 1953 | 83 days |
| 1954 | 45 days |
| 1955 | 137 days |
| 1956 | 131 days |
| 1957 | 108 days |
| 1958 | 86 days |
| 1959 | 127 days |
| 1960 | 133 days |
| 1961 | 70 days |
| 1962 | 92 days |
| 1963 | 151 days |
| 1964 | 90 days |
| 1965 | 111 days |
| 1966 | 84 days |
| 1967 | 120 days |
| 1968 | 97 days |
| 1969 | 141 days |
| 1970 | 130 days |
| 1971 | 94 days |
| 1972 | 68 days |
| 1973 | 158 days |
| 1974 | 110 days |
| 1975 | 85 days |
| 1976 | 123 days |
| 1977 | 97 days |
| 1978 | 113 days |
| 1979 | 140 days |
| 1980 | 72 days |
| 1981 | 80 days |
| 1982 | 79 days |
| 1983 | 104 days |
| 1984 | 76 days |
| 1985 | 96 days |
| 1986 | 131 days |
| 1987 | 150 days |
| 1988 | 127 days |
| 1989 | 77 days |
| 1990 | 114 days |
| 1991 | 87 days |
| 1992 | 92 days |
| 1993 | 125 days |
| 1994 | 140 days |
| 1995 | 137 days |
| 1996 | 115 days |
| 1997 | 76 days |
| 1998 | 120 days |
| 1999 | 110 days |
| 2000 | 85 days |
| 2001 | 88 days |
| 2002 | 156 days |
| 2003 | 122 days |
| 2004 | 150 days |
| 2005 | 130 days |
| 2006 | 134 days |
| 2007 | 83 days |
| 2008 | 148 days |
| 2009 | 129 days |
| 2010 | 106 days |
| 2011 | 96 days |
| 2012 | 170 days |
| 2013 | 86 days |
| 2014 | 143 days |
| 2015 | 79 days |
| 2016 | 107 days |
| 2017 | 95 days |
| 2018 | 153 days |
| 2019 | 117 days |
| 2020 | 88 days |
| 2021 | 137 days |
| 2022 | 104 days |
| 2023 | 139 days |
| 2024 | 111 days |
| 2025 | 119 days |
| 2026 | 115 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
95 years with a frostAcross 95 years with a frost, the median last spring frost at Graton falls on 1 April and the median first autumn frost on 7 November, which leaves a median of 222 days between them.
In 1994 to 2025 the median growing season was 222 days. That is 3 days fewer than in 1926 to 1957.
Fitted over all years, the growing season changes by -2.6 days per decade at this station.
| Measure | Median, all years | Earliest period (1926 to 1957) | Recent period (1994 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 1 April | 21 March | 6 April | 16 days later | +2.0 days per decade |
| First autumn frost | 7 November | 7 November | 3 November | 4 days earlier | -0.6 days per decade |
| Growing days | 222 days | 225 days | 222 days | 3 days fewer | -2.6 days per decade |
A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.
Rainfall Return Levels
99 years, 1926 to 2025A day with at least 87.1 mm (3.4 in) of rain is expected about once in 2 years. A day with at least 183.9 mm (7.2 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 87.1 mm (3.4 in) | |
| 5 years | 115.1 mm (4.5 in) | |
| 10 years | 132.8 mm (5.2 in) | |
| 25 years | 154.2 mm (6.1 in) | |
| 50 years | 169.4 mm (6.7 in) | |
| 100 years | 183.9 mm (7.2 in) | Longer than the 99 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, 99 years of values from 1926 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: 176.5 mm (6.9 in) in 1937; 170.2 mm (6.7 in) in 1981; 164.8 mm (6.5 in) in 1995.
Station Changes
2 suspected2 changes were suspected in the annual mean temperature of Graton, at 1961 and 1987. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1961 ran 0.3 C (0.6 F) higher than in the years before (likely change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1987 ran 0.3 C (0.5 F) lower than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1961 | +0.3 | +0.6 | likely | 5 |
| 1987 | -0.2 | -0.4 | 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
2009 to 2025 against 1961 to 1990Over 2009 to 2025, Graton had a mean temperature of 14.7 C (58.4 F) and 897.8 mm (35.3 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Ben Lomond #4 (United States, 164 km away), Coimbra (Portugal, 9,025 km away) and Gijon la Merced (Spain, 8,930 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Ben Lomond #4 | United States | 164 km (102 mi) | 14.8 C (58.6 F) | 1,172.0 mm (46.1 in) | 1.15 |
| Coimbra | Portugal | 9,025 km (5,608 mi) | 15.6 C (60.2 F) | 984.2 mm (38.7 in) | 1.21 |
| Gijon la Merced | Spain | 8,930 km (5,549 mi) | 13.9 C (56.9 F) | 959.9 mm (37.8 in) | 1.22 |
Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.
Download the Data
Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-14 (14 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-12).