Bowman Dam Weather Records (USC00041018)
Record envelope, standing records and threshold days for Bowman Dam (USC00041018), California, United States, with 131 years of record.
Key Facts for Bowman Dam
- Bowman Dam (USC00041018) is a weather station in California, United States at 39.45 latitude and -120.66 longitude, 1,641 m (5,385 ft) above sea level.
- The station reports from 1896 to 2026, 131 years of record.
- 1,464 records set at Bowman Dam still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Bowman Dam set a daily record precipitation of 57.5 mm (2.3 in) on 4 September 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: California, United States, 39.45 latitude, -120.66 longitude.
- Elevation: 1,641 m (5,385 ft).
- Period of record: 1896 to 2026, 131 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
5 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 23.9 C (75.0 F) | -18.9 C (-2.0 F) | 17.8 C (64.0 F) | -6.7 C (19.9 F) |
| Feb | 25.6 C (78.1 F) | -18.9 C (-2.0 F) | 19.4 C (66.9 F) | -3.3 C (26.1 F) |
| Mar | 28.3 C (82.9 F) | -15.6 C (3.9 F) | 27.8 C (82.0 F) | -7.2 C (19.0 F) |
| Apr | 31.1 C (88.0 F) | -13.9 C (7.0 F) | 20.6 C (69.1 F) | -5.0 C (23.0 F) |
| May | 33.9 C (93.0 F) | -11.1 C (12.0 F) | 27.2 C (81.0 F) | 0.0 C (32.0 F) |
| Jun | 37.8 C (100.0 F) | -3.9 C (25.0 F) | 31.1 C (88.0 F) | 2.8 C (37.0 F) |
| Jul | 38.9 C (102.0 F) | 0.0 C (32.0 F) | 30.0 C (86.0 F) | 8.9 C (48.0 F) |
| Aug | 37.2 C (99.0 F) | -1.1 C (30.0 F) | 34.4 C (93.9 F) | 10.0 C (50.0 F) |
| Sep | 36.7 C (98.1 F) | -6.1 C (21.0 F) | n/a | n/a |
| Oct | 32.2 C (90.0 F) | -7.8 C (18.0 F) | n/a | n/a |
| Nov | 27.8 C (82.0 F) | -11.7 C (10.9 F) | n/a | n/a |
| Dec | 22.2 C (72.0 F) | -17.8 C (0.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1901 | 24 |
| 1902 | 25 |
| 1903 | 17 |
| 1905 | 14 |
| 1910 | 12 |
| 1926 | 137 |
| 1927 | 13 |
| 1928 | 9 |
| 1929 | 19 |
| 1930 | 16 |
| 1931 | 12 |
| 1932 | 22 |
| 1933 | 41 |
| 1934 | 27 |
| 1935 | 19 |
| 1936 | 62 |
| 1937 | 12 |
| 1938 | 13 |
| 1939 | 11 |
| 1940 | 3 |
| 1941 | 8 |
| 1942 | 7 |
| 1943 | 4 |
| 1944 | 3 |
| 1945 | 13 |
| 1946 | 6 |
| 1947 | 26 |
| 1948 | 19 |
| 1949 | 12 |
| 1950 | 22 |
| 1951 | 10 |
| 1952 | 20 |
| 1953 | 7 |
| 1954 | 14 |
| 1955 | 25 |
| 1956 | 9 |
| 1957 | 9 |
| 1958 | 14 |
| 1959 | 15 |
| 1960 | 11 |
| 1961 | 12 |
| 1962 | 14 |
| 1963 | 17 |
| 1964 | 17 |
| 1965 | 8 |
| 1966 | 7 |
| 1967 | 27 |
| 1968 | 16 |
| 1969 | 8 |
| 1970 | 6 |
| 1971 | 18 |
| 1972 | 14 |
| 1973 | 6 |
| 1974 | 6 |
| 1975 | 24 |
| 1976 | 14 |
| 1977 | 17 |
| 1978 | 11 |
| 1979 | 6 |
| 1980 | 13 |
| 1981 | 12 |
| 1982 | 4 |
| 1983 | 5 |
| 1984 | 10 |
| 1985 | 25 |
| 1986 | 15 |
| 1987 | 17 |
| 1988 | 23 |
| 1989 | 18 |
| 1990 | 15 |
| 1991 | 9 |
| 1992 | 7 |
| 1993 | 4 |
| 1994 | 7 |
| 1995 | 22 |
| 1996 | 12 |
| 1997 | 4 |
| 1998 | 5 |
| 1999 | 5 |
| 2000 | 9 |
| 2001 | 5 |
| 2002 | 6 |
| 2003 | 14 |
| 2004 | 4 |
| 2005 | 1 |
| 2006 | 3 |
| 2007 | 2 |
| 2008 | 10 |
| 2009 | 24 |
| 2010 | 16 |
| 2011 | 8 |
| 2012 | 8 |
| 2014 | 18 |
| 2015 | 18 |
| 2016 | 10 |
| 2017 | 9 |
| 2018 | 4 |
| 2019 | 5 |
| 2020 | 4 |
| 2021 | 10 |
| 2022 | 9 |
| 2023 | 14 |
| 2024 | 4 |
| 2025 | 3 |
| 2026 | 4 |
All-Time Record Progression
4 new records| Date | Kind | Detail |
|---|---|---|
| 1955-12-22 | Record daily precipitation | Record daily precipitation 252.0 mm (9.9 in) |
| 1996-08-12 | Record high minimum temperature | Record high minimum temperature 24.4 C (75.9 F) |
| 2022-12-31 | Record daily precipitation | Record daily precipitation 252.2 mm (9.9 in) |
| 2025-12-22 | Record daily precipitation | Record daily precipitation 286.3 mm (11.3 in) |
Wettest Day of Each Month
Dec: 286.3 mm (11.3 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 210.8 mm (8.3 in) | 27 January 1903 |
| Feb | 227.1 mm (8.9 in) | 10 February 2014 |
| Mar | 191.5 mm (7.5 in) | 22 March 2018 |
| Apr | 155.2 mm (6.1 in) | 8 April 2017 |
| May | 121.4 mm (4.8 in) | 16 May 1996 |
| Jun | 70.4 mm (2.8 in) | 15 June 1929 |
| Jul | 68.3 mm (2.7 in) | 8 July 1974 |
| Aug | 45.2 mm (1.8 in) | 15 August 1976 |
| Sep | 66.5 mm (2.6 in) | 18 September 1959 |
| Oct | 193.0 mm (7.6 in) | 13 October 1962 |
| Nov | 169.7 mm (6.7 in) | 24 November 2018 |
| Dec | 286.3 mm (11.3 in) | 22 December 2025 |
Period of Record Coverage
1901 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1901 | 303 | 83% | No |
| 1902 | 344 | 94% | Yes |
| 1903 | 282 | 77% | No |
| 1905 | 34 | 9% | No |
| 1910 | 47 | 13% | No |
| 1926 | 362 | 99% | Yes |
| 1927 | 347 | 95% | Yes |
| 1928 | 350 | 96% | Yes |
| 1929 | 359 | 98% | Yes |
| 1930 | 360 | 99% | Yes |
| 1931 | 364 | 100% | Yes |
| 1932 | 363 | 99% | Yes |
| 1933 | 361 | 99% | Yes |
| 1934 | 350 | 96% | Yes |
| 1935 | 362 | 99% | Yes |
| 1936 | 361 | 99% | Yes |
| 1937 | 133 | 36% | No |
| 1938 | 364 | 100% | Yes |
| 1939 | 363 | 99% | Yes |
| 1940 | 366 | 100% | Yes |
| 1941 | 360 | 99% | Yes |
| 1942 | 363 | 99% | Yes |
| 1943 | 328 | 90% | No |
| 1944 | 117 | 32% | No |
| 1945 | 316 | 87% | No |
| 1946 | 365 | 100% | Yes |
| 1947 | 265 | 73% | No |
| 1948 | 328 | 90% | No |
| 1949 | 291 | 80% | No |
| 1950 | 333 | 91% | Yes |
| 1951 | 333 | 91% | Yes |
| 1952 | 349 | 95% | Yes |
| 1953 | 338 | 93% | Yes |
| 1954 | 351 | 96% | Yes |
| 1955 | 361 | 99% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 361 | 99% | Yes |
| 1958 | 363 | 99% | Yes |
| 1959 | 331 | 91% | Yes |
| 1960 | 363 | 99% | Yes |
| 1961 | 363 | 99% | Yes |
| 1962 | 356 | 98% | Yes |
| 1963 | 364 | 100% | Yes |
| 1964 | 356 | 97% | Yes |
| 1965 | 364 | 100% | Yes |
| 1966 | 354 | 97% | Yes |
| 1967 | 354 | 97% | Yes |
| 1968 | 353 | 96% | Yes |
| 1969 | 364 | 100% | Yes |
| 1970 | 360 | 99% | Yes |
| 1971 | 360 | 99% | Yes |
| 1972 | 356 | 97% | Yes |
| 1973 | 359 | 98% | Yes |
| 1974 | 350 | 96% | Yes |
| 1975 | 356 | 98% | Yes |
| 1976 | 354 | 97% | Yes |
| 1977 | 361 | 99% | Yes |
| 1978 | 343 | 94% | Yes |
| 1979 | 351 | 96% | Yes |
| 1980 | 349 | 95% | Yes |
| 1981 | 358 | 98% | Yes |
| 1982 | 204 | 56% | No |
| 1983 | 353 | 97% | Yes |
| 1984 | 359 | 98% | Yes |
| 1985 | 360 | 99% | Yes |
| 1986 | 359 | 98% | Yes |
| 1987 | 352 | 96% | Yes |
| 1988 | 327 | 89% | No |
| 1989 | 325 | 89% | No |
| 1990 | 280 | 77% | No |
| 1991 | 252 | 69% | No |
| 1992 | 282 | 77% | No |
| 1993 | 293 | 80% | No |
| 1994 | 297 | 81% | No |
| 1995 | 284 | 78% | No |
| 1996 | 265 | 72% | No |
| 1997 | 294 | 81% | No |
| 1998 | 229 | 63% | No |
| 1999 | 230 | 63% | No |
| 2000 | 240 | 66% | No |
| 2001 | 248 | 68% | No |
| 2002 | 253 | 69% | No |
| 2003 | 263 | 72% | No |
| 2004 | 239 | 65% | No |
| 2005 | 235 | 64% | No |
| 2006 | 245 | 67% | No |
| 2007 | 329 | 90% | Yes |
| 2008 | 302 | 83% | No |
| 2009 | 284 | 78% | No |
| 2010 | 211 | 58% | No |
| 2011 | 316 | 87% | No |
| 2012 | 270 | 74% | No |
| 2014 | 249 | 68% | No |
| 2015 | 338 | 93% | Yes |
| 2016 | 361 | 99% | Yes |
| 2017 | 154 | 42% | No |
| 2018 | 171 | 47% | No |
| 2019 | 182 | 50% | No |
| 2020 | 237 | 65% | No |
| 2021 | 239 | 65% | No |
| 2022 | 166 | 45% | No |
| 2023 | 117 | 32% | No |
| 2024 | 85 | 23% | No |
| 2025 | 50 | 14% | No |
| 2026 | 66 | 18% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 4 September 2026 | Bowman Dam, US | daily rain (Provisional) | 57.5 mm (2.3 in) | 45.1 mm (1.8 in) | 85 years | 68 of 100 (Major) |
| 13 April 2026 | Bowman Dam, US | daily snowfall | 33.0 cm (13.0 in) | 10.1 cm (4.0 in) | 31 years | 28 of 100 (Routine) |
| 13 April 2026 | Bowman Dam, US | daily rain | 84.1 mm (3.3 in) | 2.3 mm (0.09 in) | 8 years | 13 of 100 (Routine) |
| 11 April 2026 | Bowman Dam, US | daily rain | 57.4 mm (2.3 in) | 14.0 mm (0.6 in) | 7 years | 19 of 100 (Routine) |
| 28 March 2026 | Bowman Dam, US | daily high max | 22.8 C (73.0 F) | 2.8 C (5.0 F) | 100 years | 44 of 100 (Notable) |
| 25 March 2026 | Bowman Dam, US | daily high max | 27.8 C (82.0 F) | 5.6 C (10.1 F) | 100 years | 49 of 100 (Notable) |
| 19 March 2026 | Bowman Dam, US | daily high max | 24.4 C (75.9 F) | 3.3 C (5.9 F) | 89 years | 41 of 100 (Notable) |
| 18 March 2026 | Bowman Dam, US | daily high max | 25.6 C (78.1 F) | 3.4 C (6.1 F) | 21 years | 21 of 100 (Routine) |
| 11 February 2026 | Bowman Dam, US | daily high max (Tie) | 19.4 C (66.9 F) | tie | 8 years | 3 of 100 (Routine) |
| 5 January 2026 | Bowman Dam, US | daily rain | 165.9 mm (6.5 in) | 25.7 mm (1.0 in) | 48 years | 32 of 100 (Routine) |
| 26 December 2025 | Bowman Dam, US | daily rain | 123.7 mm (4.9 in) | 28.2 mm (1.1 in) | 123 years | 48 of 100 (Notable) |
| 22 December 2025 | Bowman Dam, US | all-time rain | 286.3 mm (11.3 in) | 34.1 mm (1.3 in) | 2 years | 40 of 100 (Notable) |
| 17 December 2025 | Bowman Dam, US | daily high min | 4.4 C (39.9 F) | 0.5 C (0.9 F) | 67 years | 31 of 100 (Routine) |
| 10 December 2025 | Bowman Dam, US | daily high max | 18.3 C (64.9 F) | 0.5 C (0.9 F) | 88 years | 36 of 100 (Notable) |
| 22 October 2025 | Bowman Dam, US | daily low min (Tie) | -3.3 C (26.1 F) | tie | 64 years | 7 of 100 (Routine) |
| 25 August 2025 | Bowman Dam, US | daily high max | 32.8 C (91.0 F) | 0.6 C (1.1 F) | 15 years | 15 of 100 (Routine) |
| 14 March 2025 | Bowman Dam, US | daily rain | 94.0 mm (3.7 in) | 6.6 mm (0.26 in) | 12 years | 15 of 100 (Routine) |
| 7 October 2024 | Bowman Dam, US | daily high max (Tie) | 30.0 C (86.0 F) | tie | 12 years | 3 of 100 (Routine) |
| 26 August 2024 | Bowman Dam, US | daily low min | 1.7 C (35.1 F) | 0.5 C (0.9 F) | 79 years | 34 of 100 (Routine) |
| 26 August 2024 | Bowman Dam, US | daily rain | 25.9 mm (1.0 in) | 3.8 mm (0.15 in) | 51 years | 29 of 100 (Routine) |
Climate Trend
60 complete years, 1902 to 2016| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1902 | 9.3 C | -0.51 C |
| 1926 | 10.5 C | +0.71 C |
| 1927 | 9.3 C | -0.51 C |
| 1928 | 9.7 C | -0.14 C |
| 1930 | 9.7 C | -0.05 C |
| 1931 | 10.2 C | +0.41 C |
| 1932 | 9.5 C | -0.26 C |
| 1933 | 10.3 C | +0.55 C |
| 1934 | 12.1 C | +2.26 C |
| 1935 | 11.2 C | +1.42 C |
| 1936 | 12.7 C | +2.87 C |
| 1938 | 9.5 C | -0.28 C |
| 1939 | 10.4 C | +0.58 C |
| 1940 | 9.7 C | -0.07 C |
| 1941 | 8.5 C | -1.33 C |
| 1942 | 9.1 C | -0.70 C |
| 1946 | 9.2 C | -0.60 C |
| 1950 | 9.6 C | -0.23 C |
| 1951 | 9.7 C | -0.11 C |
| 1952 | 9.1 C | -0.70 C |
| 1953 | 9.8 C | -0.04 C |
| 1954 | 10.5 C | +0.72 C |
| 1955 | 9.2 C | -0.57 C |
| 1956 | 10.0 C | +0.21 C |
| 1957 | 9.5 C | -0.28 C |
| 1958 | 10.5 C | +0.66 C |
| 1959 | 11.4 C | +1.61 C |
| 1961 | 9.8 C | +0.02 C |
| 1962 | 9.6 C | -0.16 C |
| 1963 | 9.2 C | -0.56 C |
| 1964 | 9.0 C | -0.81 C |
| 1965 | 9.2 C | -0.60 C |
| 1966 | 10.0 C | +0.23 C |
| 1967 | 9.5 C | -0.25 C |
| 1968 | 9.8 C | +0.02 C |
| 1969 | 9.5 C | -0.29 C |
| 1970 | 9.9 C | +0.08 C |
| 1971 | 8.6 C | -1.24 C |
| 1972 | 9.5 C | -0.29 C |
| 1973 | 9.2 C | -0.61 C |
| 1974 | 10.1 C | +0.26 C |
| 1975 | 8.7 C | -1.13 C |
| 1976 | 10.4 C | +0.57 C |
| 1977 | 9.9 C | +0.15 C |
| 1978 | 9.4 C | -0.36 C |
| 1979 | 8.8 C | -0.96 C |
| 1980 | 9.7 C | -0.07 C |
| 1981 | 10.4 C | +0.57 C |
| 1983 | 7.9 C | -1.92 C |
| 1984 | 9.2 C | -0.63 C |
| 1985 | 9.4 C | -0.35 C |
| 1986 | 9.9 C | +0.09 C |
| 1987 | 9.4 C | -0.41 C |
| 1988 | 10.3 C | +0.50 C |
| 1989 | 9.0 C | -0.80 C |
| 2007 | 10.8 C | +0.98 C |
| 2008 | 10.7 C | +0.95 C |
| 2011 | 9.0 C | -0.84 C |
| 2015 | 11.5 C | +1.72 C |
| 2016 | 10.3 C | +0.54 C |
The fitted trend in annual mean temperature here over 1902 to 2016 is -0.02 C (-0.11 to 0.07) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.04 F (-0.20 to 0.13) per decade. The slope is a straight line fitted to 60 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | -0.02 C (-0.11 to 0.07) per decade | -0.04 F (-0.20 to 0.13) per decade | 1902 to 2016 | 60 | Not clearly different from zero |
| Mean daily maximum | -0.04 C (-0.17 to 0.10) per decade | -0.1 F (-0.3 to 0.2) per decade | 1902 to 2016 | 60 | Not clearly different from zero |
| Mean daily minimum | 0.00 C (-0.13 to 0.12) per decade | -0.01 F (-0.23 to 0.21) per decade | 1902 to 2016 | 60 | 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
1896 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 38.9 C (102.0 F) | 1902 | 33.3 C (91.9 F) | 105 |
| Coldest night (TNn) | -18.9 C (-2.0 F) | 1932 | -12.8 C (9.0 F) | 104 |
| Wettest day (Rx1day) | 286.3 mm (11.3 in) | 2025 | 115.3 mm (4.5 in) | 122 |
| Wettest five days (Rx5day) | 689.6 mm (27.1 in) | 1964 | 219.0 mm (8.6 in) | 118 |
| Longest dry spell (CDD) | 162 days | 2002 | 62 days | 120 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1896 | n/a |
| 1897 | n/a |
| 1898 | n/a |
| 1899 | n/a |
| 1900 | n/a |
| 1901 | 34.4 C (93.9 F) |
| 1902 | 38.9 C (102.0 F) |
| 1903 | 33.3 C (91.9 F) |
| 1904 | n/a |
| 1905 | 17.8 C (64.0 F) |
| 1906 | n/a |
| 1907 | n/a |
| 1908 | n/a |
| 1909 | n/a |
| 1910 | 6.1 C (43.0 F) |
| 1911 | n/a |
| 1912 | n/a |
| 1913 | n/a |
| 1914 | n/a |
| 1915 | n/a |
| 1925 | n/a |
| 1926 | 37.8 C (100.0 F) |
| 1927 | 30.0 C (86.0 F) |
| 1928 | 32.2 C (90.0 F) |
| 1929 | 33.3 C (91.9 F) |
| 1930 | 33.3 C (91.9 F) |
| 1931 | 34.4 C (93.9 F) |
| 1932 | 31.7 C (89.1 F) |
| 1933 | 36.7 C (98.1 F) |
| 1934 | 32.2 C (90.0 F) |
| 1935 | 33.3 C (91.9 F) |
| 1936 | 32.2 C (90.0 F) |
| 1937 | 34.4 C (93.9 F) |
| 1938 | 33.3 C (91.9 F) |
| 1939 | 32.2 C (90.0 F) |
| 1940 | 32.2 C (90.0 F) |
| 1941 | 31.1 C (88.0 F) |
| 1942 | 32.8 C (91.0 F) |
| 1943 | 31.7 C (89.1 F) |
| 1944 | 17.8 C (64.0 F) |
| 1945 | 33.3 C (91.9 F) |
| 1946 | 32.2 C (90.0 F) |
| 1947 | 33.9 C (93.0 F) |
| 1948 | 35.0 C (95.0 F) |
| 1949 | 31.1 C (88.0 F) |
| 1950 | 35.0 C (95.0 F) |
| 1951 | 33.3 C (91.9 F) |
| 1952 | 30.6 C (87.1 F) |
| 1953 | 32.2 C (90.0 F) |
| 1954 | 31.7 C (89.1 F) |
| 1955 | 35.0 C (95.0 F) |
| 1956 | 34.4 C (93.9 F) |
| 1957 | 32.8 C (91.0 F) |
| 1958 | 31.7 C (89.1 F) |
| 1959 | 35.0 C (95.0 F) |
| 1960 | 35.0 C (95.0 F) |
| 1961 | 32.8 C (91.0 F) |
| 1962 | 31.7 C (89.1 F) |
| 1963 | 28.9 C (84.0 F) |
| 1964 | 31.1 C (88.0 F) |
| 1965 | 30.0 C (86.0 F) |
| 1966 | 31.7 C (89.1 F) |
| 1967 | 31.7 C (89.1 F) |
| 1968 | 31.7 C (89.1 F) |
| 1969 | 31.1 C (88.0 F) |
| 1970 | 32.2 C (90.0 F) |
| 1971 | 33.9 C (93.0 F) |
| 1972 | 35.0 C (95.0 F) |
| 1973 | 32.2 C (90.0 F) |
| 1974 | 32.8 C (91.0 F) |
| 1975 | 32.8 C (91.0 F) |
| 1976 | 32.2 C (90.0 F) |
| 1977 | 33.9 C (93.0 F) |
| 1978 | 35.0 C (95.0 F) |
| 1979 | 32.2 C (90.0 F) |
| 1980 | 32.2 C (90.0 F) |
| 1981 | 36.7 C (98.1 F) |
| 1982 | 30.6 C (87.1 F) |
| 1983 | 32.8 C (91.0 F) |
| 1984 | 32.8 C (91.0 F) |
| 1985 | 32.8 C (91.0 F) |
| 1986 | 31.7 C (89.1 F) |
| 1987 | 35.0 C (95.0 F) |
| 1988 | 36.7 C (98.1 F) |
| 1989 | 32.2 C (90.0 F) |
| 1990 | 33.3 C (91.9 F) |
| 1991 | 33.3 C (91.9 F) |
| 1992 | 32.8 C (91.0 F) |
| 1993 | 32.8 C (91.0 F) |
| 1994 | 33.9 C (93.0 F) |
| 1995 | 31.7 C (89.1 F) |
| 1996 | 33.9 C (93.0 F) |
| 1997 | 33.9 C (93.0 F) |
| 1998 | 34.4 C (93.9 F) |
| 1999 | 33.9 C (93.0 F) |
| 2000 | 35.0 C (95.0 F) |
| 2001 | 33.9 C (93.0 F) |
| 2002 | 35.6 C (96.1 F) |
| 2003 | 34.4 C (93.9 F) |
| 2004 | 33.9 C (93.0 F) |
| 2005 | 31.7 C (89.1 F) |
| 2006 | 35.6 C (96.1 F) |
| 2007 | 34.4 C (93.9 F) |
| 2008 | 35.0 C (95.0 F) |
| 2009 | 35.0 C (95.0 F) |
| 2010 | 33.3 C (91.9 F) |
| 2011 | 30.6 C (87.1 F) |
| 2012 | 33.9 C (93.0 F) |
| 2013 | n/a |
| 2014 | 35.6 C (96.1 F) |
| 2015 | 30.6 C (87.1 F) |
| 2016 | 30.6 C (87.1 F) |
| 2017 | 35.0 C (95.0 F) |
| 2018 | 34.4 C (93.9 F) |
| 2019 | 32.8 C (91.0 F) |
| 2020 | 33.9 C (93.0 F) |
| 2021 | 35.6 C (96.1 F) |
| 2022 | 36.7 C (98.1 F) |
| 2023 | 35.0 C (95.0 F) |
| 2024 | 36.7 C (98.1 F) |
| 2025 | 32.8 C (91.0 F) |
| 2026 | 34.4 C (93.9 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1896 | n/a |
| 1897 | n/a |
| 1898 | n/a |
| 1899 | n/a |
| 1900 | n/a |
| 1901 | -12.2 C (10.0 F) |
| 1902 | -12.8 C (9.0 F) |
| 1903 | -17.2 C (1.0 F) |
| 1904 | n/a |
| 1905 | n/a |
| 1906 | n/a |
| 1907 | n/a |
| 1908 | n/a |
| 1909 | n/a |
| 1910 | -16.1 C (3.0 F) |
| 1911 | n/a |
| 1912 | n/a |
| 1913 | n/a |
| 1914 | n/a |
| 1915 | n/a |
| 1925 | n/a |
| 1926 | -16.1 C (3.0 F) |
| 1927 | -12.2 C (10.0 F) |
| 1928 | -11.7 C (10.9 F) |
| 1929 | -12.8 C (9.0 F) |
| 1930 | -16.7 C (1.9 F) |
| 1931 | -13.3 C (8.1 F) |
| 1932 | -18.9 C (-2.0 F) |
| 1933 | -13.3 C (8.1 F) |
| 1934 | -7.8 C (18.0 F) |
| 1935 | -18.9 C (-2.0 F) |
| 1936 | -8.9 C (16.0 F) |
| 1937 | -16.7 C (1.9 F) |
| 1938 | -13.3 C (8.1 F) |
| 1939 | -14.4 C (6.1 F) |
| 1940 | -11.7 C (10.9 F) |
| 1941 | -11.1 C (12.0 F) |
| 1942 | -12.8 C (9.0 F) |
| 1943 | -16.7 C (1.9 F) |
| 1944 | -12.2 C (10.0 F) |
| 1945 | -12.2 C (10.0 F) |
| 1946 | -12.8 C (9.0 F) |
| 1947 | -12.8 C (9.0 F) |
| 1948 | -13.3 C (8.1 F) |
| 1949 | -17.8 C (0.0 F) |
| 1950 | -18.9 C (-2.0 F) |
| 1951 | -16.1 C (3.0 F) |
| 1952 | -14.4 C (6.1 F) |
| 1953 | -9.4 C (15.1 F) |
| 1954 | -11.1 C (12.0 F) |
| 1955 | -16.7 C (1.9 F) |
| 1956 | -14.4 C (6.1 F) |
| 1957 | -16.1 C (3.0 F) |
| 1958 | -12.2 C (10.0 F) |
| 1959 | -11.1 C (12.0 F) |
| 1960 | -12.2 C (10.0 F) |
| 1961 | -12.8 C (9.0 F) |
| 1962 | -16.7 C (1.9 F) |
| 1963 | -15.6 C (3.9 F) |
| 1964 | -12.2 C (10.0 F) |
| 1965 | -13.3 C (8.1 F) |
| 1966 | -15.6 C (3.9 F) |
| 1967 | -13.3 C (8.1 F) |
| 1968 | -12.2 C (10.0 F) |
| 1969 | -15.0 C (5.0 F) |
| 1970 | -10.0 C (14.0 F) |
| 1971 | -11.7 C (10.9 F) |
| 1972 | -16.1 C (3.0 F) |
| 1973 | -12.2 C (10.0 F) |
| 1974 | -13.3 C (8.1 F) |
| 1975 | -12.2 C (10.0 F) |
| 1976 | -10.6 C (12.9 F) |
| 1977 | -13.3 C (8.1 F) |
| 1978 | -12.8 C (9.0 F) |
| 1979 | -12.2 C (10.0 F) |
| 1980 | -11.7 C (10.9 F) |
| 1981 | -9.4 C (15.1 F) |
| 1982 | -12.2 C (10.0 F) |
| 1983 | -9.4 C (15.1 F) |
| 1984 | -11.1 C (12.0 F) |
| 1985 | -12.2 C (10.0 F) |
| 1986 | -9.4 C (15.1 F) |
| 1987 | -13.3 C (8.1 F) |
| 1988 | -15.0 C (5.0 F) |
| 1989 | -17.2 C (1.0 F) |
| 1990 | -17.2 C (1.0 F) |
| 1991 | -8.3 C (17.1 F) |
| 1992 | -11.7 C (10.9 F) |
| 1993 | -15.0 C (5.0 F) |
| 1994 | -13.3 C (8.1 F) |
| 1995 | -12.2 C (10.0 F) |
| 1996 | -13.3 C (8.1 F) |
| 1997 | -13.3 C (8.1 F) |
| 1998 | -12.2 C (10.0 F) |
| 1999 | -12.8 C (9.0 F) |
| 2000 | -10.6 C (12.9 F) |
| 2001 | -11.7 C (10.9 F) |
| 2002 | -14.4 C (6.1 F) |
| 2003 | -10.0 C (14.0 F) |
| 2004 | -11.7 C (10.9 F) |
| 2005 | -9.4 C (15.1 F) |
| 2006 | -11.1 C (12.0 F) |
| 2007 | -11.1 C (12.0 F) |
| 2008 | -11.7 C (10.9 F) |
| 2009 | -12.8 C (9.0 F) |
| 2010 | -10.0 C (14.0 F) |
| 2011 | -13.3 C (8.1 F) |
| 2012 | -11.1 C (12.0 F) |
| 2013 | n/a |
| 2014 | -8.9 C (16.0 F) |
| 2015 | -12.2 C (10.0 F) |
| 2016 | -11.1 C (12.0 F) |
| 2017 | -11.7 C (10.9 F) |
| 2018 | -11.1 C (12.0 F) |
| 2019 | -12.8 C (9.0 F) |
| 2020 | -11.1 C (12.0 F) |
| 2021 | -12.8 C (9.0 F) |
| 2022 | -14.4 C (6.1 F) |
| 2023 | -18.9 C (-2.0 F) |
| 2024 | -13.3 C (8.1 F) |
| 2025 | -13.3 C (8.1 F) |
| 2026 | -7.2 C (19.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1896 | 105.7 mm (4.2 in) |
| 1897 | 90.4 mm (3.6 in) |
| 1898 | 92.2 mm (3.6 in) |
| 1899 | 156.2 mm (6.1 in) |
| 1900 | 100.3 mm (3.9 in) |
| 1901 | 124.5 mm (4.9 in) |
| 1902 | 101.6 mm (4.0 in) |
| 1903 | 210.8 mm (8.3 in) |
| 1904 | 202.4 mm (8.0 in) |
| 1905 | 99.1 mm (3.9 in) |
| 1906 | 205.7 mm (8.1 in) |
| 1907 | 164.8 mm (6.5 in) |
| 1908 | 80.0 mm (3.1 in) |
| 1909 | 114.8 mm (4.5 in) |
| 1910 | 68.1 mm (2.7 in) |
| 1911 | 50.8 mm (2.0 in) |
| 1912 | 74.9 mm (2.9 in) |
| 1913 | 90.4 mm (3.6 in) |
| 1914 | 76.2 mm (3.0 in) |
| 1915 | 134.6 mm (5.3 in) |
| 1925 | 53.3 mm (2.1 in) |
| 1926 | 103.6 mm (4.1 in) |
| 1927 | 77.0 mm (3.0 in) |
| 1928 | 158.5 mm (6.2 in) |
| 1929 | 131.1 mm (5.2 in) |
| 1930 | 124.2 mm (4.9 in) |
| 1931 | 101.6 mm (4.0 in) |
| 1932 | 55.1 mm (2.2 in) |
| 1933 | 112.5 mm (4.4 in) |
| 1934 | 88.1 mm (3.5 in) |
| 1935 | 76.2 mm (3.0 in) |
| 1936 | 104.6 mm (4.1 in) |
| 1937 | 198.9 mm (7.8 in) |
| 1938 | 112.0 mm (4.4 in) |
| 1939 | 106.2 mm (4.2 in) |
| 1940 | 111.8 mm (4.4 in) |
| 1941 | 119.4 mm (4.7 in) |
| 1942 | 138.4 mm (5.4 in) |
| 1943 | 143.5 mm (5.6 in) |
| 1944 | 121.4 mm (4.8 in) |
| 1945 | 123.7 mm (4.9 in) |
| 1946 | 140.2 mm (5.5 in) |
| 1947 | 133.9 mm (5.3 in) |
| 1948 | 166.6 mm (6.6 in) |
| 1949 | 70.4 mm (2.8 in) |
| 1950 | 137.9 mm (5.4 in) |
| 1951 | 102.1 mm (4.0 in) |
| 1952 | 63.0 mm (2.5 in) |
| 1953 | 90.7 mm (3.6 in) |
| 1954 | 128.3 mm (5.1 in) |
| 1955 | 252.0 mm (9.9 in) |
| 1956 | 104.6 mm (4.1 in) |
| 1957 | 114.8 mm (4.5 in) |
| 1958 | 52.1 mm (2.1 in) |
| 1959 | 99.3 mm (3.9 in) |
| 1960 | 174.0 mm (6.9 in) |
| 1961 | 55.4 mm (2.2 in) |
| 1962 | 193.0 mm (7.6 in) |
| 1963 | 163.3 mm (6.4 in) |
| 1964 | 198.9 mm (7.8 in) |
| 1965 | 101.3 mm (4.0 in) |
| 1966 | 103.6 mm (4.1 in) |
| 1967 | 132.1 mm (5.2 in) |
| 1968 | 84.8 mm (3.3 in) |
| 1969 | 144.5 mm (5.7 in) |
| 1970 | 143.0 mm (5.6 in) |
| 1971 | 94.5 mm (3.7 in) |
| 1972 | 76.5 mm (3.0 in) |
| 1973 | 101.6 mm (4.0 in) |
| 1974 | 95.8 mm (3.8 in) |
| 1975 | 115.8 mm (4.6 in) |
| 1976 | 61.0 mm (2.4 in) |
| 1977 | 94.0 mm (3.7 in) |
| 1978 | 140.2 mm (5.5 in) |
| 1979 | 117.3 mm (4.6 in) |
| 1980 | 174.8 mm (6.9 in) |
| 1981 | 179.3 mm (7.1 in) |
| 1982 | 141.0 mm (5.6 in) |
| 1983 | 139.2 mm (5.5 in) |
| 1984 | 61.7 mm (2.4 in) |
| 1985 | 136.9 mm (5.4 in) |
| 1986 | 144.3 mm (5.7 in) |
| 1987 | 86.6 mm (3.4 in) |
| 1988 | 163.1 mm (6.4 in) |
| 1989 | 78.5 mm (3.1 in) |
| 1990 | 78.2 mm (3.1 in) |
| 1991 | 85.9 mm (3.4 in) |
| 1992 | 83.3 mm (3.3 in) |
| 1993 | 91.4 mm (3.6 in) |
| 1994 | 105.7 mm (4.2 in) |
| 1995 | 133.9 mm (5.3 in) |
| 1996 | 154.9 mm (6.1 in) |
| 1997 | 201.2 mm (7.9 in) |
| 1998 | 88.9 mm (3.5 in) |
| 1999 | 144.8 mm (5.7 in) |
| 2000 | 130.0 mm (5.1 in) |
| 2001 | 138.9 mm (5.5 in) |
| 2002 | 172.2 mm (6.8 in) |
| 2003 | 126.0 mm (5.0 in) |
| 2004 | 85.9 mm (3.4 in) |
| 2005 | 120.4 mm (4.7 in) |
| 2006 | 65.3 mm (2.6 in) |
| 2007 | 80.3 mm (3.2 in) |
| 2008 | 68.6 mm (2.7 in) |
| 2009 | 95.0 mm (3.7 in) |
| 2010 | 172.7 mm (6.8 in) |
| 2011 | 109.2 mm (4.3 in) |
| 2012 | 135.1 mm (5.3 in) |
| 2013 | 47.0 mm (1.9 in) |
| 2014 | 227.1 mm (8.9 in) |
| 2015 | 92.7 mm (3.6 in) |
| 2016 | 147.8 mm (5.8 in) |
| 2017 | 172.7 mm (6.8 in) |
| 2018 | 191.5 mm (7.5 in) |
| 2019 | 213.6 mm (8.4 in) |
| 2020 | 101.6 mm (4.0 in) |
| 2021 | 192.3 mm (7.6 in) |
| 2022 | 252.2 mm (9.9 in) |
| 2023 | 170.2 mm (6.7 in) |
| 2024 | 139.2 mm (5.5 in) |
| 2025 | 286.3 mm (11.3 in) |
| 2026 | 165.9 mm (6.5 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1896 | 313.2 mm (12.3 in) |
| 1897 | 255.1 mm (10.0 in) |
| 1898 | 116.3 mm (4.6 in) |
| 1899 | 343.7 mm (13.5 in) |
| 1900 | 245.5 mm (9.7 in) |
| 1901 | 273.3 mm (10.8 in) |
| 1902 | 169.4 mm (6.7 in) |
| 1903 | 507.3 mm (20.0 in) |
| 1904 | 574.0 mm (22.6 in) |
| 1905 | 12.4 mm (0.5 in) |
| 1906 | 388.6 mm (15.3 in) |
| 1907 | 446.5 mm (17.6 in) |
| 1908 | 160.0 mm (6.3 in) |
| 1909 | 402.8 mm (15.9 in) |
| 1910 | 181.6 mm (7.1 in) |
| 1911 | n/a |
| 1912 | 116.6 mm (4.6 in) |
| 1913 | 354.1 mm (13.9 in) |
| 1914 | 160.3 mm (6.3 in) |
| 1915 | 257.5 mm (10.1 in) |
| 1925 | n/a |
| 1926 | 280.2 mm (11.0 in) |
| 1927 | 221.2 mm (8.7 in) |
| 1928 | 436.3 mm (17.2 in) |
| 1929 | 399.7 mm (15.7 in) |
| 1930 | 211.6 mm (8.3 in) |
| 1931 | 250.3 mm (9.9 in) |
| 1932 | 130.0 mm (5.1 in) |
| 1933 | 215.9 mm (8.5 in) |
| 1934 | 200.1 mm (7.9 in) |
| 1935 | 197.6 mm (7.8 in) |
| 1936 | 307.2 mm (12.1 in) |
| 1937 | 350.1 mm (13.8 in) |
| 1938 | 382.7 mm (15.1 in) |
| 1939 | 250.2 mm (9.9 in) |
| 1940 | 354.1 mm (13.9 in) |
| 1941 | 209.1 mm (8.2 in) |
| 1942 | 315.1 mm (12.4 in) |
| 1943 | 332.3 mm (13.1 in) |
| 1944 | 172.5 mm (6.8 in) |
| 1945 | 354.5 mm (14.0 in) |
| 1946 | 275.6 mm (10.9 in) |
| 1947 | 167.0 mm (6.6 in) |
| 1948 | 222.8 mm (8.8 in) |
| 1949 | 131.3 mm (5.2 in) |
| 1950 | 240.3 mm (9.5 in) |
| 1951 | 158.4 mm (6.2 in) |
| 1952 | 165.6 mm (6.5 in) |
| 1953 | 148.3 mm (5.8 in) |
| 1954 | 217.3 mm (8.6 in) |
| 1955 | 82.7 mm (3.3 in) |
| 1956 | 148.6 mm (5.9 in) |
| 1957 | 176.0 mm (6.9 in) |
| 1958 | 52.1 mm (2.1 in) |
| 1959 | 90.1 mm (3.5 in) |
| 1960 | 333.3 mm (13.1 in) |
| 1961 | 142.7 mm (5.6 in) |
| 1962 | 593.0 mm (23.3 in) |
| 1963 | 436.4 mm (17.2 in) |
| 1964 | 689.6 mm (27.1 in) |
| 1965 | 244.5 mm (9.6 in) |
| 1966 | 220.7 mm (8.7 in) |
| 1967 | 238.2 mm (9.4 in) |
| 1968 | 186.0 mm (7.3 in) |
| 1969 | 412.6 mm (16.2 in) |
| 1970 | 382.8 mm (15.1 in) |
| 1971 | 225.0 mm (8.9 in) |
| 1972 | 155.1 mm (6.1 in) |
| 1973 | 311.5 mm (12.3 in) |
| 1974 | 268.1 mm (10.6 in) |
| 1975 | 196.8 mm (7.7 in) |
| 1976 | 125.4 mm (4.9 in) |
| 1977 | 201.0 mm (7.9 in) |
| 1978 | 255.2 mm (10.0 in) |
| 1979 | 213.3 mm (8.4 in) |
| 1980 | 492.0 mm (19.4 in) |
| 1981 | 364.5 mm (14.4 in) |
| 1982 | 266.0 mm (10.5 in) |
| 1983 | 292.5 mm (11.5 in) |
| 1984 | 151.6 mm (6.0 in) |
| 1985 | 154.2 mm (6.1 in) |
| 1986 | 461.7 mm (18.2 in) |
| 1987 | 171.6 mm (6.8 in) |
| 1988 | 205.0 mm (8.1 in) |
| 1989 | 155.8 mm (6.1 in) |
| 1990 | 101.1 mm (4.0 in) |
| 1991 | 149.4 mm (5.9 in) |
| 1992 | 150.1 mm (5.9 in) |
| 1993 | 104.9 mm (4.1 in) |
| 1994 | 188.4 mm (7.4 in) |
| 1995 | 367.1 mm (14.5 in) |
| 1996 | 360.1 mm (14.2 in) |
| 1997 | 559.1 mm (22.0 in) |
| 1998 | 180.5 mm (7.1 in) |
| 1999 | 287.6 mm (11.3 in) |
| 2000 | 189.5 mm (7.5 in) |
| 2001 | 225.3 mm (8.9 in) |
| 2002 | 278.7 mm (11.0 in) |
| 2003 | 148.6 mm (5.9 in) |
| 2004 | 155.4 mm (6.1 in) |
| 2005 | 258.1 mm (10.2 in) |
| 2006 | 82.8 mm (3.3 in) |
| 2007 | 263.9 mm (10.4 in) |
| 2008 | 153.4 mm (6.0 in) |
| 2009 | 189.5 mm (7.5 in) |
| 2010 | 311.4 mm (12.3 in) |
| 2011 | 241.8 mm (9.5 in) |
| 2012 | 352.8 mm (13.9 in) |
| 2013 | 47.0 mm (1.9 in) |
| 2014 | 176.5 mm (6.9 in) |
| 2015 | 208.3 mm (8.2 in) |
| 2016 | 261.8 mm (10.3 in) |
| 2017 | 242.9 mm (9.6 in) |
| 2018 | 34.3 mm (1.4 in) |
| 2019 | 141.5 mm (5.6 in) |
| 2020 | 102.9 mm (4.1 in) |
| 2021 | 24.6 mm (1.0 in) |
| 2022 | 58.7 mm (2.3 in) |
| 2023 | n/a |
| 2024 | n/a |
| 2025 | 0.0 mm (0.00 in) |
| 2026 | 57.5 mm (2.3 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1896 | 50 days |
| 1897 | 33 days |
| 1898 | 28 days |
| 1899 | 24 days |
| 1900 | 46 days |
| 1901 | 69 days |
| 1902 | 103 days |
| 1903 | 56 days |
| 1904 | 38 days |
| 1905 | 51 days |
| 1906 | 17 days |
| 1907 | 24 days |
| 1908 | 62 days |
| 1909 | 62 days |
| 1910 | 13 days |
| 1911 | n/a |
| 1912 | 26 days |
| 1913 | 31 days |
| 1914 | 75 days |
| 1915 | 151 days |
| 1925 | n/a |
| 1926 | 53 days |
| 1927 | 53 days |
| 1928 | 92 days |
| 1929 | 111 days |
| 1930 | 86 days |
| 1931 | 93 days |
| 1932 | 102 days |
| 1933 | 125 days |
| 1934 | 60 days |
| 1935 | 107 days |
| 1936 | 43 days |
| 1937 | 107 days |
| 1938 | 26 days |
| 1939 | 67 days |
| 1940 | 66 days |
| 1941 | 39 days |
| 1942 | 68 days |
| 1943 | 126 days |
| 1944 | 56 days |
| 1945 | 88 days |
| 1946 | 58 days |
| 1947 | 111 days |
| 1948 | 85 days |
| 1949 | 75 days |
| 1950 | 78 days |
| 1951 | 140 days |
| 1952 | 61 days |
| 1953 | 43 days |
| 1954 | 71 days |
| 1955 | 72 days |
| 1956 | 95 days |
| 1957 | 98 days |
| 1958 | 40 days |
| 1959 | 85 days |
| 1960 | 134 days |
| 1961 | 64 days |
| 1962 | 48 days |
| 1963 | 46 days |
| 1964 | 82 days |
| 1965 | 43 days |
| 1966 | 102 days |
| 1967 | 66 days |
| 1968 | 69 days |
| 1969 | 61 days |
| 1970 | 66 days |
| 1971 | 27 days |
| 1972 | 79 days |
| 1973 | 44 days |
| 1974 | 90 days |
| 1975 | 33 days |
| 1976 | 64 days |
| 1977 | 66 days |
| 1978 | 50 days |
| 1979 | 39 days |
| 1980 | 100 days |
| 1981 | 90 days |
| 1982 | 17 days |
| 1983 | 40 days |
| 1984 | 38 days |
| 1985 | 48 days |
| 1986 | 63 days |
| 1987 | 44 days |
| 1988 | 54 days |
| 1989 | 59 days |
| 1990 | 42 days |
| 1991 | 44 days |
| 1992 | 80 days |
| 1993 | 69 days |
| 1994 | 95 days |
| 1995 | 122 days |
| 1996 | 45 days |
| 1997 | 50 days |
| 1998 | 85 days |
| 1999 | 66 days |
| 2000 | 84 days |
| 2001 | 89 days |
| 2002 | 162 days |
| 2003 | 83 days |
| 2004 | 79 days |
| 2005 | 57 days |
| 2006 | 109 days |
| 2007 | 104 days |
| 2008 | 127 days |
| 2009 | 54 days |
| 2010 | 85 days |
| 2011 | 62 days |
| 2012 | 1 day |
| 2013 | 35 days |
| 2014 | 26 days |
| 2015 | 44 days |
| 2016 | 94 days |
| 2017 | 92 days |
| 2018 | 44 days |
| 2019 | 6 days |
| 2020 | 38 days |
| 2021 | 37 days |
| 2022 | 42 days |
| 2023 | 3 days |
| 2024 | 2 days |
| 2025 | 12 days |
| 2026 | 51 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
60 years with a frostAcross 60 years with a frost, the median last spring frost at Bowman Dam falls on 24 May and the median first autumn frost on 13 October, which leaves a median of 145 days between them.
In 1964 to 2016 the median growing season was 143 days. That is 5 days fewer than in 1902 to 1963.
Fitted over all years, the growing season changes by -0.8 days per decade at this station.
| Measure | Median, all years | Earliest period (1902 to 1963) | Recent period (1964 to 2016) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 24 May | 23 May | 25 May | 2 days later | -0.2 days per decade |
| First autumn frost | 13 October | 14 October | 12 October | 2 days earlier | -0.9 days per decade |
| Growing days | 145 days | 148 days | 143 days | 5 days fewer | -0.8 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
67 years, 1901 to 2016A day with at least 118.3 mm (4.7 in) of rain is expected about once in 2 years. A day with at least 235.6 mm (9.3 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 118.3 mm (4.7 in) | |
| 5 years | 154.8 mm (6.1 in) | |
| 10 years | 176.7 mm (7.0 in) | |
| 25 years | 202.2 mm (8.0 in) | |
| 50 years | 219.6 mm (8.6 in) | |
| 100 years | 235.6 mm (9.3 in) | Longer than the 67 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, 67 years of values from 1901 to 2016.
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: 252.0 mm (9.9 in) in 1955; 201.2 mm (7.9 in) in 1997; 198.9 mm (7.8 in) in 1937.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Bowman Dam, at 1979. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1979 ran 0.7 C (1.2 F) lower than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1979 | -0.7 | -1.2 | 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.
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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-14).