Alta 1 NNW Weather Records (USC00480140)
Record envelope, standing records and threshold days for Alta 1 NNW (USC00480140), Wyoming, United States, with 118 years of record.
Key Facts for Alta 1 NNW
- Alta 1 NNW (USC00480140) is a weather station in Wyoming, United States at 43.77 latitude and -111.03 longitude, 1,963 m (6,440 ft) above sea level.
- The station reports from 1909 to 2026, 118 years of record.
- 1,464 records set at Alta 1 NNW still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Alta 1 NNW tied a daily record high minimum temperature of 15.6 C (60.1 F) on 27 July 2026.
About the Station
- Location: Wyoming, United States, 43.77 latitude, -111.03 longitude.
- Elevation: 1,963 m (6,440 ft).
- Period of record: 1909 to 2026, 118 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
8 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 14.4 C (57.9 F) | -41.1 C (-42.0 F) | 6.1 C (43.0 F) | -18.9 C (-2.0 F) |
| Feb | 15.6 C (60.1 F) | -43.3 C (-45.9 F) | 8.9 C (48.0 F) | -21.7 C (-7.1 F) |
| Mar | 20.6 C (69.1 F) | -31.1 C (-24.0 F) | 20.6 C (69.1 F) | -13.3 C (8.1 F) |
| Apr | 26.1 C (79.0 F) | -26.1 C (-15.0 F) | 21.1 C (70.0 F) | -12.2 C (10.0 F) |
| May | 30.6 C (87.1 F) | -13.3 C (8.1 F) | 26.1 C (79.0 F) | -5.6 C (21.9 F) |
| Jun | 33.3 C (91.9 F) | -6.7 C (19.9 F) | 27.2 C (81.0 F) | -1.7 C (28.9 F) |
| Jul | 36.7 C (98.1 F) | -10.6 C (12.9 F) | 36.7 C (98.1 F) | 3.3 C (37.9 F) |
| Aug | 35.0 C (95.0 F) | -12.2 C (10.0 F) | 30.6 C (87.1 F) | 3.9 C (39.0 F) |
| Sep | 32.2 C (90.0 F) | -14.4 C (6.1 F) | 17.2 C (63.0 F) | 0.6 C (33.1 F) |
| Oct | 27.2 C (81.0 F) | -25.0 C (-13.0 F) | n/a | n/a |
| Nov | 20.6 C (69.1 F) | -35.6 C (-32.1 F) | n/a | n/a |
| Dec | 17.8 C (64.0 F) | -41.1 C (-42.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1909 | 9 |
| 1910 | 25 |
| 1911 | 25 |
| 1912 | 11 |
| 1913 | 19 |
| 1914 | 18 |
| 1915 | 14 |
| 1916 | 21 |
| 1917 | 37 |
| 1918 | 23 |
| 1919 | 22 |
| 1920 | 18 |
| 1921 | 14 |
| 1922 | 21 |
| 1923 | 15 |
| 1924 | 22 |
| 1925 | 10 |
| 1926 | 18 |
| 1927 | 14 |
| 1928 | 12 |
| 1929 | 18 |
| 1930 | 9 |
| 1931 | 22 |
| 1932 | 14 |
| 1933 | 21 |
| 1934 | 30 |
| 1935 | 9 |
| 1936 | 21 |
| 1937 | 20 |
| 1938 | 4 |
| 1939 | 23 |
| 1940 | 12 |
| 1948 | 14 |
| 1949 | 9 |
| 1950 | 25 |
| 1951 | 13 |
| 1952 | 10 |
| 1953 | 4 |
| 1954 | 13 |
| 1955 | 23 |
| 1956 | 9 |
| 1957 | 5 |
| 1958 | 16 |
| 1959 | 11 |
| 1960 | 13 |
| 1961 | 13 |
| 1962 | 16 |
| 1963 | 13 |
| 1964 | 8 |
| 1965 | 10 |
| 1966 | 7 |
| 1967 | 6 |
| 1968 | 18 |
| 1969 | 14 |
| 1970 | 11 |
| 1971 | 6 |
| 1972 | 8 |
| 1973 | 11 |
| 1974 | 13 |
| 1975 | 19 |
| 1976 | 10 |
| 1977 | 19 |
| 1978 | 12 |
| 1979 | 12 |
| 1980 | 13 |
| 1981 | 6 |
| 1982 | 7 |
| 1983 | 12 |
| 1984 | 10 |
| 1985 | 14 |
| 1986 | 17 |
| 1987 | 19 |
| 1988 | 19 |
| 1989 | 16 |
| 1990 | 18 |
| 1991 | 15 |
| 1992 | 15 |
| 1993 | 21 |
| 1994 | 14 |
| 1995 | 5 |
| 1996 | 9 |
| 1997 | 4 |
| 1998 | 6 |
| 1999 | 10 |
| 2000 | 9 |
| 2001 | 8 |
| 2002 | 5 |
| 2003 | 19 |
| 2004 | 8 |
| 2005 | 10 |
| 2006 | 7 |
| 2007 | 13 |
| 2008 | 6 |
| 2009 | 3 |
| 2010 | 14 |
| 2011 | 8 |
| 2012 | 5 |
| 2013 | 6 |
| 2014 | 12 |
| 2015 | 24 |
| 2016 | 11 |
| 2017 | 6 |
| 2018 | 6 |
| 2019 | 8 |
| 2020 | 10 |
| 2021 | 6 |
| 2022 | 16 |
| 2023 | 1 |
| 2024 | 3 |
| 2025 | 9 |
| 2026 | 19 |
All-Time Record Progression
4 new records| Date | Kind | Detail |
|---|---|---|
| 1951-07-16 | Record high minimum temperature | Record high minimum temperature 18.3 C (64.9 F) |
| 1983-12-23 | Record low maximum temperature | Record low maximum temperature -23.3 C (-9.9 F) |
| 2023-03-25 | Record snow depth | Record snow depth 147.3 cm (58.0 in) |
| 2026-07-12 | Record high maximum temperature | Record high maximum temperature 36.7 C (98.1 F) |
Wettest Day of Each Month
Nov: 68.6 mm (2.7 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 43.7 mm (1.7 in) | 25 January 2001 |
| Feb | 22.9 mm (0.9 in) | 8 February 1985 |
| Mar | 36.1 mm (1.4 in) | 21 March 1995 |
| Apr | 50.8 mm (2.0 in) | 8 April 1920 |
| May | 44.5 mm (1.8 in) | 26 May 1911 |
| Jun | 47.0 mm (1.9 in) | 9 June 1932 |
| Jul | 44.5 mm (1.8 in) | 3 July 1993 |
| Aug | 39.9 mm (1.6 in) | 13 August 1978 |
| Sep | 39.4 mm (1.6 in) | 23 September 2016 |
| Oct | 43.2 mm (1.7 in) | 27 October 1940 |
| Nov | 68.6 mm (2.7 in) | 11 November 1912 |
| Dec | 31.8 mm (1.3 in) | 19 December 1981 |
Period of Record Coverage
1909 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1909 | 167 | 46% | No |
| 1910 | 363 | 99% | Yes |
| 1911 | 362 | 99% | Yes |
| 1912 | 364 | 99% | Yes |
| 1913 | 331 | 91% | Yes |
| 1914 | 341 | 93% | Yes |
| 1915 | 363 | 99% | Yes |
| 1916 | 347 | 95% | Yes |
| 1917 | 352 | 96% | Yes |
| 1918 | 363 | 99% | Yes |
| 1919 | 355 | 97% | Yes |
| 1920 | 364 | 99% | Yes |
| 1921 | 363 | 99% | Yes |
| 1922 | 364 | 100% | Yes |
| 1923 | 361 | 99% | Yes |
| 1924 | 230 | 63% | No |
| 1925 | 361 | 99% | Yes |
| 1926 | 338 | 93% | Yes |
| 1927 | 355 | 97% | Yes |
| 1928 | 358 | 98% | Yes |
| 1929 | 362 | 99% | Yes |
| 1930 | 363 | 99% | Yes |
| 1931 | 359 | 98% | Yes |
| 1932 | 358 | 98% | Yes |
| 1933 | 360 | 99% | Yes |
| 1934 | 338 | 93% | Yes |
| 1935 | 350 | 96% | Yes |
| 1936 | 366 | 100% | Yes |
| 1937 | 364 | 100% | Yes |
| 1938 | 333 | 91% | Yes |
| 1939 | 362 | 99% | Yes |
| 1940 | 358 | 98% | Yes |
| 1948 | 366 | 100% | Yes |
| 1949 | 365 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 347 | 95% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 357 | 98% | Yes |
| 1957 | 361 | 99% | Yes |
| 1958 | 358 | 98% | Yes |
| 1959 | 359 | 98% | Yes |
| 1960 | 362 | 99% | Yes |
| 1961 | 349 | 96% | Yes |
| 1962 | 351 | 96% | Yes |
| 1963 | 363 | 99% | Yes |
| 1964 | 362 | 99% | Yes |
| 1965 | 331 | 91% | Yes |
| 1966 | 356 | 98% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 365 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 361 | 99% | Yes |
| 1971 | 364 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 361 | 99% | Yes |
| 1975 | 362 | 99% | Yes |
| 1976 | 335 | 92% | Yes |
| 1977 | 361 | 99% | Yes |
| 1978 | 345 | 95% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 363 | 99% | Yes |
| 1981 | 333 | 91% | Yes |
| 1982 | 357 | 98% | Yes |
| 1983 | 359 | 98% | Yes |
| 1984 | 364 | 99% | Yes |
| 1985 | 363 | 99% | Yes |
| 1986 | 360 | 99% | Yes |
| 1987 | 361 | 99% | Yes |
| 1988 | 365 | 100% | Yes |
| 1989 | 364 | 100% | Yes |
| 1990 | 364 | 100% | Yes |
| 1991 | 363 | 99% | Yes |
| 1992 | 347 | 95% | Yes |
| 1993 | 354 | 97% | Yes |
| 1994 | 363 | 99% | Yes |
| 1995 | 364 | 100% | Yes |
| 1996 | 366 | 100% | Yes |
| 1997 | 356 | 98% | Yes |
| 1998 | 365 | 100% | Yes |
| 1999 | 364 | 100% | Yes |
| 2000 | 366 | 100% | Yes |
| 2001 | 365 | 100% | Yes |
| 2002 | 365 | 100% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 333 | 91% | Yes |
| 2005 | 362 | 99% | Yes |
| 2006 | 363 | 99% | Yes |
| 2007 | 361 | 99% | Yes |
| 2008 | 366 | 100% | Yes |
| 2009 | 334 | 92% | Yes |
| 2010 | 365 | 100% | Yes |
| 2011 | 365 | 100% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 365 | 100% | Yes |
| 2015 | 365 | 100% | Yes |
| 2016 | 366 | 100% | Yes |
| 2017 | 363 | 99% | Yes |
| 2018 | 365 | 100% | Yes |
| 2019 | 365 | 100% | Yes |
| 2020 | 347 | 95% | Yes |
| 2021 | 365 | 100% | Yes |
| 2022 | 365 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 365 | 100% | Yes |
| 2026 | 246 | 67% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 27 July 2026 | Alta 1 NNW, US | daily high min (Tie) | 15.6 C (60.1 F) | tie | 51 years | 6 of 100 (Routine) |
| 23 July 2026 | Alta 1 NNW, US | daily high min | 17.2 C (63.0 F) | 0.5 C (0.9 F) | 20 years | 17 of 100 (Routine) |
| 22 July 2026 | Alta 1 NNW, US | daily high min (Tie) | 17.2 C (63.0 F) | tie | 19 years | 3 of 100 (Routine) |
| 21 July 2026 | Alta 1 NNW, US | all-time high min (Tie) | 18.3 C (64.9 F) | tie | 75 years | 13 of 100 (Routine) |
| 12 July 2026 | Alta 1 NNW, US | all-time high max | 36.7 C (98.1 F) | 0.6 C (1.1 F) | 100 years | 61 of 100 (Major) |
| 29 June 2026 | Alta 1 NNW, US | daily low max | 6.7 C (44.1 F) | 3.9 C (7.0 F) | 5 years | 18 of 100 (Routine) |
| 28 June 2026 | Alta 1 NNW, US | daily low max | 10.6 C (51.1 F) | 0.5 C (0.9 F) | 56 years | 27 of 100 (Routine) |
| 26 May 2026 | Alta 1 NNW, US | daily high min | 10.6 C (51.1 F) | 0.6 C (1.1 F) | 76 years | 34 of 100 (Routine) |
| 30 March 2026 | Alta 1 NNW, US | daily high min | 4.4 C (39.9 F) | 2.7 C (4.9 F) | 40 years | 26 of 100 (Routine) |
| 29 March 2026 | Alta 1 NNW, US | daily high min | 4.4 C (39.9 F) | 1.1 C (2.0 F) | 40 years | 23 of 100 (Routine) |
| 28 March 2026 | Alta 1 NNW, US | daily high max | 18.3 C (64.9 F) | 2.7 C (4.9 F) | 40 years | 27 of 100 (Routine) |
| 25 March 2026 | Alta 1 NNW, US | daily high max | 18.3 C (64.9 F) | 2.7 C (4.9 F) | 13 years | 19 of 100 (Routine) |
| 25 March 2026 | Alta 1 NNW, US | daily high min | 5.6 C (42.1 F) | 2.8 C (5.0 F) | 13 years | 18 of 100 (Routine) |
| 24 March 2026 | Alta 1 NNW, US | monthly high min | 6.7 C (44.1 F) | 0.6 C (1.1 F) | 14 years | 24 of 100 (Routine) |
| 21 March 2026 | Alta 1 NNW, US | daily high min | 3.3 C (37.9 F) | 1.1 C (2.0 F) | 8 years | 13 of 100 (Routine) |
| 21 March 2026 | Alta 1 NNW, US | monthly high max (Tie) | 20.6 C (69.1 F) | tie | 0 years | 5 of 100 (Routine) |
| 20 March 2026 | Alta 1 NNW, US | daily high min | 2.8 C (37.0 F) | 0.6 C (1.1 F) | 116 years | 40 of 100 (Notable) |
| 20 March 2026 | Alta 1 NNW, US | monthly high max | 20.6 C (69.1 F) | 0.6 C (1.1 F) | 0 years | 21 of 100 (Routine) |
| 19 March 2026 | Alta 1 NNW, US | monthly high max | 20.0 C (68.0 F) | 1.1 C (2.0 F) | 106 years | 52 of 100 (Notable) |
| 18 March 2026 | Alta 1 NNW, US | daily high max | 17.8 C (64.0 F) | 2.2 C (4.0 F) | 53 years | 30 of 100 (Routine) |
Climate Trend
89 complete years, 1910 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1910 | 4.1 C | -0.31 C |
| 1911 | 1.8 C | -2.61 C |
| 1912 | 1.8 C | -2.57 C |
| 1915 | 4.2 C | -0.19 C |
| 1918 | 4.3 C | -0.05 C |
| 1919 | 3.8 C | -0.54 C |
| 1920 | 3.0 C | -1.34 C |
| 1921 | 4.5 C | +0.18 C |
| 1925 | 4.8 C | +0.45 C |
| 1927 | 3.4 C | -0.94 C |
| 1928 | 3.7 C | -0.65 C |
| 1929 | 3.0 C | -1.37 C |
| 1930 | 3.7 C | -0.71 C |
| 1931 | 4.4 C | +0.07 C |
| 1932 | 3.1 C | -1.24 C |
| 1933 | 4.5 C | +0.17 C |
| 1935 | 4.1 C | -0.28 C |
| 1936 | 4.9 C | +0.52 C |
| 1937 | 4.3 C | -0.11 C |
| 1939 | 5.0 C | +0.62 C |
| 1940 | 5.5 C | +1.14 C |
| 1948 | 4.0 C | -0.35 C |
| 1949 | 4.5 C | +0.12 C |
| 1950 | 4.4 C | +0.05 C |
| 1951 | 3.6 C | -0.74 C |
| 1952 | 4.1 C | -0.25 C |
| 1953 | 4.7 C | +0.30 C |
| 1955 | 3.4 C | -1.01 C |
| 1956 | 4.2 C | -0.12 C |
| 1957 | 4.4 C | +0.01 C |
| 1958 | 5.7 C | +1.34 C |
| 1959 | 4.9 C | +0.55 C |
| 1960 | 5.5 C | +1.11 C |
| 1961 | 4.9 C | +0.58 C |
| 1962 | 5.0 C | +0.66 C |
| 1963 | 5.3 C | +0.97 C |
| 1964 | 3.6 C | -0.81 C |
| 1966 | 5.0 C | +0.67 C |
| 1967 | 4.6 C | +0.28 C |
| 1968 | 4.1 C | -0.28 C |
| 1969 | 4.8 C | +0.46 C |
| 1970 | 3.8 C | -0.54 C |
| 1971 | 3.2 C | -1.13 C |
| 1972 | 3.6 C | -0.73 C |
| 1973 | 4.0 C | -0.41 C |
| 1974 | 3.9 C | -0.51 C |
| 1975 | 2.3 C | -2.10 C |
| 1977 | 3.3 C | -1.09 C |
| 1982 | 3.6 C | -0.77 C |
| 1983 | 4.7 C | +0.30 C |
| 1984 | 3.6 C | -0.72 C |
| 1985 | 3.3 C | -1.07 C |
| 1986 | 5.5 C | +1.18 C |
| 1987 | 5.2 C | +0.82 C |
| 1988 | 5.1 C | +0.77 C |
| 1989 | 4.3 C | -0.09 C |
| 1990 | 4.6 C | +0.27 C |
| 1991 | 4.5 C | +0.11 C |
| 1992 | 5.0 C | +0.67 C |
| 1993 | 2.4 C | -1.94 C |
| 1994 | 4.7 C | +0.38 C |
| 1995 | 4.8 C | +0.47 C |
| 1996 | 4.6 C | +0.19 C |
| 1997 | 4.3 C | -0.11 C |
| 1998 | 4.9 C | +0.56 C |
| 1999 | 4.9 C | +0.55 C |
| 2000 | 4.8 C | +0.40 C |
| 2001 | 5.2 C | +0.84 C |
| 2002 | 3.9 C | -0.44 C |
| 2003 | 5.5 C | +1.14 C |
| 2005 | 4.7 C | +0.29 C |
| 2006 | 4.8 C | +0.42 C |
| 2007 | 5.3 C | +0.98 C |
| 2008 | 3.7 C | -0.64 C |
| 2010 | 4.3 C | -0.10 C |
| 2011 | 3.7 C | -0.62 C |
| 2012 | 5.8 C | +1.43 C |
| 2013 | 4.4 C | +0.08 C |
| 2014 | 5.2 C | +0.82 C |
| 2015 | 6.5 C | +2.10 C |
| 2016 | 5.8 C | +1.42 C |
| 2017 | 5.1 C | +0.72 C |
| 2018 | 4.9 C | +0.57 C |
| 2019 | 4.1 C | -0.30 C |
| 2021 | 5.5 C | +1.10 C |
| 2022 | 4.0 C | -0.40 C |
| 2023 | 4.2 C | -0.15 C |
| 2024 | 5.1 C | +0.76 C |
| 2025 | 5.5 C | +1.15 C |
The annual mean temperature here has risen by 0.1 C (0.1 to 0.2) per decade over 1910 to 2025. In Fahrenheit: 0.2 F (0.1 to 0.3) per decade. The slope is a straight line fitted to 89 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.1 C (0.1 to 0.2) per decade | 0.2 F (0.1 to 0.3) per decade | 1910 to 2025 | 89 | Rise |
| Mean daily maximum | -0.06 C (-0.12 to 0.00) per decade | -0.12 F (-0.22 to -0.01) per decade | 1910 to 2025 | 89 | Fall |
| Mean daily minimum | 0.3 C (0.2 to 0.3) per decade | 0.5 F (0.4 to 0.6) per decade | 1910 to 2025 | 89 | 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
1909 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 36.7 C (98.1 F) | 2026 | 32.2 C (90.0 F) | 111 |
| Coldest night (TNn) | -43.3 C (-45.9 F) | 1933 | -28.9 C (-20.0 F) | 111 |
| Wettest day (Rx1day) | 68.6 mm (2.7 in) | 1912 | 26.7 mm (1.1 in) | 111 |
| Wettest five days (Rx5day) | 100.6 mm (4.0 in) | 1987 | 49.2 mm (1.9 in) | 109 |
| Longest dry spell (CDD) | 63 days | 1952 | 25 days | 111 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1909 | 30.0 C (86.0 F) |
| 1910 | 30.6 C (87.1 F) |
| 1911 | 30.0 C (86.0 F) |
| 1912 | 28.3 C (82.9 F) |
| 1913 | 28.9 C (84.0 F) |
| 1914 | 30.0 C (86.0 F) |
| 1915 | 29.4 C (84.9 F) |
| 1916 | 30.6 C (87.1 F) |
| 1917 | 30.6 C (87.1 F) |
| 1918 | 31.1 C (88.0 F) |
| 1919 | 32.8 C (91.0 F) |
| 1920 | 31.7 C (89.1 F) |
| 1921 | 32.2 C (90.0 F) |
| 1922 | 31.1 C (88.0 F) |
| 1923 | 31.7 C (89.1 F) |
| 1924 | 32.2 C (90.0 F) |
| 1925 | 36.1 C (97.0 F) |
| 1926 | 32.2 C (90.0 F) |
| 1927 | 30.0 C (86.0 F) |
| 1928 | 32.8 C (91.0 F) |
| 1929 | 32.2 C (90.0 F) |
| 1930 | 32.8 C (91.0 F) |
| 1931 | 35.6 C (96.1 F) |
| 1932 | 31.1 C (88.0 F) |
| 1933 | 35.0 C (95.0 F) |
| 1934 | 35.6 C (96.1 F) |
| 1935 | 35.6 C (96.1 F) |
| 1936 | 34.4 C (93.9 F) |
| 1937 | 32.2 C (90.0 F) |
| 1938 | 30.0 C (86.0 F) |
| 1939 | 33.3 C (91.9 F) |
| 1940 | 33.3 C (91.9 F) |
| 1948 | 31.7 C (89.1 F) |
| 1949 | 31.1 C (88.0 F) |
| 1950 | 32.2 C (90.0 F) |
| 1951 | 32.2 C (90.0 F) |
| 1952 | 30.6 C (87.1 F) |
| 1953 | 31.1 C (88.0 F) |
| 1954 | 34.4 C (93.9 F) |
| 1955 | 32.2 C (90.0 F) |
| 1956 | 30.0 C (86.0 F) |
| 1957 | 30.0 C (86.0 F) |
| 1958 | 33.3 C (91.9 F) |
| 1959 | 32.2 C (90.0 F) |
| 1960 | 35.0 C (95.0 F) |
| 1961 | 34.4 C (93.9 F) |
| 1962 | 32.2 C (90.0 F) |
| 1963 | 31.7 C (89.1 F) |
| 1964 | 31.1 C (88.0 F) |
| 1965 | 31.1 C (88.0 F) |
| 1966 | 32.2 C (90.0 F) |
| 1967 | 31.7 C (89.1 F) |
| 1968 | 32.2 C (90.0 F) |
| 1969 | 32.8 C (91.0 F) |
| 1970 | 33.3 C (91.9 F) |
| 1971 | 32.2 C (90.0 F) |
| 1972 | 32.2 C (90.0 F) |
| 1973 | 32.2 C (90.0 F) |
| 1974 | 32.2 C (90.0 F) |
| 1975 | 32.2 C (90.0 F) |
| 1976 | 32.2 C (90.0 F) |
| 1977 | 31.7 C (89.1 F) |
| 1978 | 32.8 C (91.0 F) |
| 1979 | 33.3 C (91.9 F) |
| 1980 | 32.2 C (90.0 F) |
| 1981 | 32.2 C (90.0 F) |
| 1982 | 32.2 C (90.0 F) |
| 1983 | 30.6 C (87.1 F) |
| 1984 | 31.7 C (89.1 F) |
| 1985 | 32.2 C (90.0 F) |
| 1986 | 31.7 C (89.1 F) |
| 1987 | 28.3 C (82.9 F) |
| 1988 | 32.8 C (91.0 F) |
| 1989 | 31.7 C (89.1 F) |
| 1990 | 31.7 C (89.1 F) |
| 1991 | 29.4 C (84.9 F) |
| 1992 | 29.4 C (84.9 F) |
| 1993 | 27.8 C (82.0 F) |
| 1994 | 31.7 C (89.1 F) |
| 1995 | 32.2 C (90.0 F) |
| 1996 | 31.1 C (88.0 F) |
| 1997 | 32.2 C (90.0 F) |
| 1998 | 32.2 C (90.0 F) |
| 1999 | 30.0 C (86.0 F) |
| 2000 | 33.3 C (91.9 F) |
| 2001 | 31.7 C (89.1 F) |
| 2002 | 34.4 C (93.9 F) |
| 2003 | 35.0 C (95.0 F) |
| 2004 | 28.9 C (84.0 F) |
| 2005 | 32.8 C (91.0 F) |
| 2006 | 33.3 C (91.9 F) |
| 2007 | 33.3 C (91.9 F) |
| 2008 | 30.0 C (86.0 F) |
| 2009 | 30.6 C (87.1 F) |
| 2010 | 30.6 C (87.1 F) |
| 2011 | 30.0 C (86.0 F) |
| 2012 | 32.2 C (90.0 F) |
| 2013 | 32.2 C (90.0 F) |
| 2014 | 30.6 C (87.1 F) |
| 2015 | 33.3 C (91.9 F) |
| 2016 | 31.1 C (88.0 F) |
| 2017 | 31.7 C (89.1 F) |
| 2018 | 33.9 C (93.0 F) |
| 2019 | 31.7 C (89.1 F) |
| 2020 | 32.8 C (91.0 F) |
| 2021 | 32.2 C (90.0 F) |
| 2022 | 32.2 C (90.0 F) |
| 2023 | 33.9 C (93.0 F) |
| 2024 | 32.8 C (91.0 F) |
| 2025 | 31.1 C (88.0 F) |
| 2026 | 36.7 C (98.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1909 | -34.4 C (-29.9 F) |
| 1910 | -35.0 C (-31.0 F) |
| 1911 | -40.0 C (-40.0 F) |
| 1912 | -33.3 C (-27.9 F) |
| 1913 | -39.4 C (-38.9 F) |
| 1914 | -40.0 C (-40.0 F) |
| 1915 | -33.9 C (-29.0 F) |
| 1916 | -31.7 C (-25.1 F) |
| 1917 | -36.1 C (-33.0 F) |
| 1918 | -32.8 C (-27.0 F) |
| 1919 | -38.3 C (-36.9 F) |
| 1920 | -28.3 C (-18.9 F) |
| 1921 | -28.9 C (-20.0 F) |
| 1922 | -37.8 C (-36.0 F) |
| 1923 | -35.0 C (-31.0 F) |
| 1924 | -37.8 C (-36.0 F) |
| 1925 | -23.3 C (-9.9 F) |
| 1926 | -30.6 C (-23.1 F) |
| 1927 | -30.0 C (-22.0 F) |
| 1928 | -27.2 C (-17.0 F) |
| 1929 | -36.1 C (-33.0 F) |
| 1930 | -38.3 C (-36.9 F) |
| 1931 | -27.8 C (-18.0 F) |
| 1932 | -34.4 C (-29.9 F) |
| 1933 | -43.3 C (-45.9 F) |
| 1934 | -24.4 C (-11.9 F) |
| 1935 | -32.8 C (-27.0 F) |
| 1936 | -35.6 C (-32.1 F) |
| 1937 | -41.1 C (-42.0 F) |
| 1938 | -27.2 C (-17.0 F) |
| 1939 | -27.2 C (-17.0 F) |
| 1940 | -32.8 C (-27.0 F) |
| 1948 | -28.9 C (-20.0 F) |
| 1949 | -29.4 C (-20.9 F) |
| 1950 | -28.9 C (-20.0 F) |
| 1951 | -33.3 C (-27.9 F) |
| 1952 | -27.8 C (-18.0 F) |
| 1953 | -27.2 C (-17.0 F) |
| 1954 | -24.4 C (-11.9 F) |
| 1955 | -30.0 C (-22.0 F) |
| 1956 | -31.1 C (-24.0 F) |
| 1957 | -30.0 C (-22.0 F) |
| 1958 | -23.3 C (-9.9 F) |
| 1959 | -27.8 C (-18.0 F) |
| 1960 | -28.9 C (-20.0 F) |
| 1961 | -26.1 C (-15.0 F) |
| 1962 | -31.1 C (-24.0 F) |
| 1963 | -37.2 C (-35.0 F) |
| 1964 | -30.6 C (-23.1 F) |
| 1965 | -27.8 C (-18.0 F) |
| 1966 | -25.6 C (-14.1 F) |
| 1967 | -28.9 C (-20.0 F) |
| 1968 | -27.2 C (-17.0 F) |
| 1969 | -26.1 C (-15.0 F) |
| 1970 | -27.8 C (-18.0 F) |
| 1971 | -31.7 C (-25.1 F) |
| 1972 | -34.4 C (-29.9 F) |
| 1973 | -26.1 C (-15.0 F) |
| 1974 | -30.6 C (-23.1 F) |
| 1975 | -31.7 C (-25.1 F) |
| 1976 | -28.9 C (-20.0 F) |
| 1977 | -31.7 C (-25.1 F) |
| 1978 | -28.9 C (-20.0 F) |
| 1979 | -34.4 C (-29.9 F) |
| 1980 | -30.6 C (-23.1 F) |
| 1981 | -20.6 C (-5.1 F) |
| 1982 | -31.7 C (-25.1 F) |
| 1983 | -34.4 C (-29.9 F) |
| 1984 | -31.1 C (-24.0 F) |
| 1985 | -30.6 C (-23.1 F) |
| 1986 | -23.9 C (-11.0 F) |
| 1987 | -23.3 C (-9.9 F) |
| 1988 | -24.4 C (-11.9 F) |
| 1989 | -32.2 C (-26.0 F) |
| 1990 | -41.1 C (-42.0 F) |
| 1991 | -29.4 C (-20.9 F) |
| 1992 | -33.3 C (-27.9 F) |
| 1993 | -35.6 C (-32.1 F) |
| 1994 | -24.4 C (-11.9 F) |
| 1995 | -25.0 C (-13.0 F) |
| 1996 | -29.4 C (-20.9 F) |
| 1997 | -23.9 C (-11.0 F) |
| 1998 | -28.3 C (-18.9 F) |
| 1999 | -23.3 C (-9.9 F) |
| 2000 | -21.7 C (-7.1 F) |
| 2001 | -24.4 C (-11.9 F) |
| 2002 | -26.7 C (-16.1 F) |
| 2003 | -26.1 C (-15.0 F) |
| 2004 | -26.7 C (-16.1 F) |
| 2005 | -25.6 C (-14.1 F) |
| 2006 | -23.9 C (-11.0 F) |
| 2007 | -30.6 C (-23.1 F) |
| 2008 | -23.9 C (-11.0 F) |
| 2009 | -26.7 C (-16.1 F) |
| 2010 | -26.1 C (-15.0 F) |
| 2011 | -29.4 C (-20.9 F) |
| 2012 | -21.7 C (-7.1 F) |
| 2013 | -28.3 C (-18.9 F) |
| 2014 | -23.9 C (-11.0 F) |
| 2015 | -22.8 C (-9.0 F) |
| 2016 | -24.4 C (-11.9 F) |
| 2017 | -27.8 C (-18.0 F) |
| 2018 | -21.7 C (-7.1 F) |
| 2019 | -24.4 C (-11.9 F) |
| 2020 | -23.3 C (-9.9 F) |
| 2021 | -18.3 C (-0.9 F) |
| 2022 | -29.4 C (-20.9 F) |
| 2023 | -29.4 C (-20.9 F) |
| 2024 | -27.2 C (-17.0 F) |
| 2025 | -32.8 C (-27.0 F) |
| 2026 | -21.7 C (-7.1 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1909 | 20.3 mm (0.8 in) |
| 1910 | 27.9 mm (1.1 in) |
| 1911 | 44.5 mm (1.8 in) |
| 1912 | 68.6 mm (2.7 in) |
| 1913 | 31.0 mm (1.2 in) |
| 1914 | 18.0 mm (0.7 in) |
| 1915 | 39.4 mm (1.6 in) |
| 1916 | 39.1 mm (1.5 in) |
| 1917 | 24.9 mm (1.0 in) |
| 1918 | 31.8 mm (1.3 in) |
| 1919 | 22.9 mm (0.9 in) |
| 1920 | 50.8 mm (2.0 in) |
| 1921 | 15.2 mm (0.6 in) |
| 1922 | 35.6 mm (1.4 in) |
| 1923 | 25.4 mm (1.0 in) |
| 1924 | 27.9 mm (1.1 in) |
| 1925 | 22.6 mm (0.9 in) |
| 1926 | 35.6 mm (1.4 in) |
| 1927 | 20.3 mm (0.8 in) |
| 1928 | 18.0 mm (0.7 in) |
| 1929 | 30.5 mm (1.2 in) |
| 1930 | 26.7 mm (1.1 in) |
| 1931 | 33.0 mm (1.3 in) |
| 1932 | 47.0 mm (1.9 in) |
| 1933 | 24.4 mm (1.0 in) |
| 1934 | 35.6 mm (1.4 in) |
| 1935 | 18.5 mm (0.7 in) |
| 1936 | 22.4 mm (0.9 in) |
| 1937 | 24.9 mm (1.0 in) |
| 1938 | 29.5 mm (1.2 in) |
| 1939 | 24.1 mm (0.9 in) |
| 1940 | 43.2 mm (1.7 in) |
| 1948 | 28.7 mm (1.1 in) |
| 1949 | 22.1 mm (0.9 in) |
| 1950 | 24.4 mm (1.0 in) |
| 1951 | 26.9 mm (1.1 in) |
| 1952 | 20.6 mm (0.8 in) |
| 1953 | 24.1 mm (0.9 in) |
| 1954 | 34.3 mm (1.4 in) |
| 1955 | 17.8 mm (0.7 in) |
| 1956 | 15.7 mm (0.6 in) |
| 1957 | 39.1 mm (1.5 in) |
| 1958 | 25.1 mm (1.0 in) |
| 1959 | 21.8 mm (0.9 in) |
| 1960 | 16.3 mm (0.6 in) |
| 1961 | 31.8 mm (1.3 in) |
| 1962 | 27.9 mm (1.1 in) |
| 1963 | 26.7 mm (1.1 in) |
| 1964 | 40.1 mm (1.6 in) |
| 1965 | 19.1 mm (0.8 in) |
| 1966 | 26.2 mm (1.0 in) |
| 1967 | 26.7 mm (1.1 in) |
| 1968 | 29.5 mm (1.2 in) |
| 1969 | 25.7 mm (1.0 in) |
| 1970 | 26.9 mm (1.1 in) |
| 1971 | 31.8 mm (1.3 in) |
| 1972 | 24.9 mm (1.0 in) |
| 1973 | 21.6 mm (0.9 in) |
| 1974 | 33.0 mm (1.3 in) |
| 1975 | 25.7 mm (1.0 in) |
| 1976 | 21.8 mm (0.9 in) |
| 1977 | 31.8 mm (1.3 in) |
| 1978 | 39.9 mm (1.6 in) |
| 1979 | 23.4 mm (0.9 in) |
| 1980 | 25.4 mm (1.0 in) |
| 1981 | 31.8 mm (1.3 in) |
| 1982 | 26.4 mm (1.0 in) |
| 1983 | 40.6 mm (1.6 in) |
| 1984 | 20.3 mm (0.8 in) |
| 1985 | 31.8 mm (1.3 in) |
| 1986 | 24.1 mm (0.9 in) |
| 1987 | 30.7 mm (1.2 in) |
| 1988 | 44.5 mm (1.8 in) |
| 1989 | 24.1 mm (0.9 in) |
| 1990 | 38.1 mm (1.5 in) |
| 1991 | 25.4 mm (1.0 in) |
| 1992 | 40.6 mm (1.6 in) |
| 1993 | 44.5 mm (1.8 in) |
| 1994 | 36.6 mm (1.4 in) |
| 1995 | 36.1 mm (1.4 in) |
| 1996 | 29.5 mm (1.2 in) |
| 1997 | 31.8 mm (1.3 in) |
| 1998 | 21.1 mm (0.8 in) |
| 1999 | 23.4 mm (0.9 in) |
| 2000 | 29.2 mm (1.1 in) |
| 2001 | 43.7 mm (1.7 in) |
| 2002 | 26.2 mm (1.0 in) |
| 2003 | 19.6 mm (0.8 in) |
| 2004 | 26.9 mm (1.1 in) |
| 2005 | 26.7 mm (1.1 in) |
| 2006 | 19.8 mm (0.8 in) |
| 2007 | 25.9 mm (1.0 in) |
| 2008 | 33.0 mm (1.3 in) |
| 2009 | 25.4 mm (1.0 in) |
| 2010 | 25.4 mm (1.0 in) |
| 2011 | 26.2 mm (1.0 in) |
| 2012 | 25.4 mm (1.0 in) |
| 2013 | 30.5 mm (1.2 in) |
| 2014 | 31.2 mm (1.2 in) |
| 2015 | 23.9 mm (0.9 in) |
| 2016 | 39.4 mm (1.6 in) |
| 2017 | 34.8 mm (1.4 in) |
| 2018 | 37.6 mm (1.5 in) |
| 2019 | 28.7 mm (1.1 in) |
| 2020 | 27.2 mm (1.1 in) |
| 2021 | 38.6 mm (1.5 in) |
| 2022 | 25.9 mm (1.0 in) |
| 2023 | 34.3 mm (1.4 in) |
| 2024 | 21.6 mm (0.9 in) |
| 2025 | 26.2 mm (1.0 in) |
| 2026 | 19.8 mm (0.8 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1909 | 41.5 mm (1.6 in) |
| 1910 | 34.2 mm (1.3 in) |
| 1911 | 54.9 mm (2.2 in) |
| 1912 | 94.0 mm (3.7 in) |
| 1913 | 59.4 mm (2.3 in) |
| 1914 | 53.2 mm (2.1 in) |
| 1915 | 87.2 mm (3.4 in) |
| 1916 | 40.0 mm (1.6 in) |
| 1917 | 47.3 mm (1.9 in) |
| 1918 | 43.2 mm (1.7 in) |
| 1919 | 54.2 mm (2.1 in) |
| 1920 | 54.9 mm (2.2 in) |
| 1921 | 25.3 mm (1.0 in) |
| 1922 | 27.1 mm (1.1 in) |
| 1923 | 29.0 mm (1.1 in) |
| 1924 | 33.0 mm (1.3 in) |
| 1925 | n/a |
| 1926 | 12.3 mm (0.5 in) |
| 1927 | 34.0 mm (1.3 in) |
| 1928 | 32.4 mm (1.3 in) |
| 1929 | n/a |
| 1930 | 44.1 mm (1.7 in) |
| 1931 | 26.2 mm (1.0 in) |
| 1932 | 61.0 mm (2.4 in) |
| 1933 | 34.1 mm (1.3 in) |
| 1934 | 33.3 mm (1.3 in) |
| 1935 | 28.6 mm (1.1 in) |
| 1936 | 41.3 mm (1.6 in) |
| 1937 | 51.2 mm (2.0 in) |
| 1938 | 48.0 mm (1.9 in) |
| 1939 | 53.6 mm (2.1 in) |
| 1940 | 61.8 mm (2.4 in) |
| 1948 | 53.0 mm (2.1 in) |
| 1949 | 44.7 mm (1.8 in) |
| 1950 | 43.8 mm (1.7 in) |
| 1951 | 60.5 mm (2.4 in) |
| 1952 | 34.7 mm (1.4 in) |
| 1953 | 38.3 mm (1.5 in) |
| 1954 | 39.9 mm (1.6 in) |
| 1955 | 48.3 mm (1.9 in) |
| 1956 | 45.4 mm (1.8 in) |
| 1957 | 49.2 mm (1.9 in) |
| 1958 | 39.9 mm (1.6 in) |
| 1959 | 62.8 mm (2.5 in) |
| 1960 | 43.7 mm (1.7 in) |
| 1961 | 58.2 mm (2.3 in) |
| 1962 | 47.7 mm (1.9 in) |
| 1963 | 57.2 mm (2.3 in) |
| 1964 | 64.3 mm (2.5 in) |
| 1965 | 44.2 mm (1.7 in) |
| 1966 | 41.5 mm (1.6 in) |
| 1967 | 60.0 mm (2.4 in) |
| 1968 | 72.8 mm (2.9 in) |
| 1969 | 60.3 mm (2.4 in) |
| 1970 | 50.0 mm (2.0 in) |
| 1971 | 56.9 mm (2.2 in) |
| 1972 | 43.7 mm (1.7 in) |
| 1973 | 45.2 mm (1.8 in) |
| 1974 | 45.7 mm (1.8 in) |
| 1975 | 54.9 mm (2.2 in) |
| 1976 | 40.4 mm (1.6 in) |
| 1977 | 44.8 mm (1.8 in) |
| 1978 | 65.3 mm (2.6 in) |
| 1979 | 46.2 mm (1.8 in) |
| 1980 | 54.0 mm (2.1 in) |
| 1981 | 62.7 mm (2.5 in) |
| 1982 | 46.0 mm (1.8 in) |
| 1983 | 67.1 mm (2.6 in) |
| 1984 | 38.9 mm (1.5 in) |
| 1985 | 54.7 mm (2.2 in) |
| 1986 | 52.4 mm (2.1 in) |
| 1987 | 100.6 mm (4.0 in) |
| 1988 | 53.1 mm (2.1 in) |
| 1989 | 49.2 mm (1.9 in) |
| 1990 | 55.9 mm (2.2 in) |
| 1991 | 67.3 mm (2.6 in) |
| 1992 | 67.6 mm (2.7 in) |
| 1993 | 73.2 mm (2.9 in) |
| 1994 | 64.1 mm (2.5 in) |
| 1995 | 53.7 mm (2.1 in) |
| 1996 | 51.8 mm (2.0 in) |
| 1997 | 69.4 mm (2.7 in) |
| 1998 | 38.6 mm (1.5 in) |
| 1999 | 65.0 mm (2.6 in) |
| 2000 | 58.7 mm (2.3 in) |
| 2001 | 43.7 mm (1.7 in) |
| 2002 | 66.4 mm (2.6 in) |
| 2003 | 48.1 mm (1.9 in) |
| 2004 | 56.4 mm (2.2 in) |
| 2005 | 59.2 mm (2.3 in) |
| 2006 | 36.0 mm (1.4 in) |
| 2007 | 48.8 mm (1.9 in) |
| 2008 | 39.3 mm (1.5 in) |
| 2009 | 52.6 mm (2.1 in) |
| 2010 | 51.8 mm (2.0 in) |
| 2011 | 47.1 mm (1.9 in) |
| 2012 | 48.5 mm (1.9 in) |
| 2013 | 72.9 mm (2.9 in) |
| 2014 | 56.9 mm (2.2 in) |
| 2015 | 42.5 mm (1.7 in) |
| 2016 | 72.7 mm (2.9 in) |
| 2017 | 61.5 mm (2.4 in) |
| 2018 | 57.4 mm (2.3 in) |
| 2019 | 45.8 mm (1.8 in) |
| 2020 | 40.9 mm (1.6 in) |
| 2021 | 61.9 mm (2.4 in) |
| 2022 | 52.1 mm (2.1 in) |
| 2023 | 69.3 mm (2.7 in) |
| 2024 | 39.8 mm (1.6 in) |
| 2025 | 42.9 mm (1.7 in) |
| 2026 | 35.6 mm (1.4 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1909 | 14 days |
| 1910 | 22 days |
| 1911 | 30 days |
| 1912 | 25 days |
| 1913 | 23 days |
| 1914 | 41 days |
| 1915 | 22 days |
| 1916 | 16 days |
| 1917 | 26 days |
| 1918 | 23 days |
| 1919 | 58 days |
| 1920 | 21 days |
| 1921 | 18 days |
| 1922 | 15 days |
| 1923 | 22 days |
| 1924 | 2 days |
| 1925 | 2 days |
| 1926 | 2 days |
| 1927 | 2 days |
| 1928 | 9 days |
| 1929 | 2 days |
| 1930 | 1 day |
| 1931 | 16 days |
| 1932 | 27 days |
| 1933 | 39 days |
| 1934 | 38 days |
| 1935 | 25 days |
| 1936 | 29 days |
| 1937 | 26 days |
| 1938 | 21 days |
| 1939 | 44 days |
| 1940 | 22 days |
| 1948 | 25 days |
| 1949 | 34 days |
| 1950 | 26 days |
| 1951 | 26 days |
| 1952 | 63 days |
| 1953 | 24 days |
| 1954 | 18 days |
| 1955 | 18 days |
| 1956 | 28 days |
| 1957 | 19 days |
| 1958 | 27 days |
| 1959 | 31 days |
| 1960 | 32 days |
| 1961 | 32 days |
| 1962 | 33 days |
| 1963 | 19 days |
| 1964 | 47 days |
| 1965 | 29 days |
| 1966 | 34 days |
| 1967 | 32 days |
| 1968 | 22 days |
| 1969 | 25 days |
| 1970 | 27 days |
| 1971 | 21 days |
| 1972 | 22 days |
| 1973 | 16 days |
| 1974 | 37 days |
| 1975 | 23 days |
| 1976 | 39 days |
| 1977 | 37 days |
| 1978 | 53 days |
| 1979 | 29 days |
| 1980 | 23 days |
| 1981 | 37 days |
| 1982 | 11 days |
| 1983 | 18 days |
| 1984 | 31 days |
| 1985 | 34 days |
| 1986 | 31 days |
| 1987 | 59 days |
| 1988 | 38 days |
| 1989 | 20 days |
| 1990 | 23 days |
| 1991 | 22 days |
| 1992 | 29 days |
| 1993 | 36 days |
| 1994 | 28 days |
| 1995 | 17 days |
| 1996 | 28 days |
| 1997 | 18 days |
| 1998 | 20 days |
| 1999 | 38 days |
| 2000 | 17 days |
| 2001 | 21 days |
| 2002 | 22 days |
| 2003 | 29 days |
| 2004 | 23 days |
| 2005 | 21 days |
| 2006 | 18 days |
| 2007 | 45 days |
| 2008 | 21 days |
| 2009 | 19 days |
| 2010 | 23 days |
| 2011 | 22 days |
| 2012 | 25 days |
| 2013 | 15 days |
| 2014 | 21 days |
| 2015 | 20 days |
| 2016 | 27 days |
| 2017 | 20 days |
| 2018 | 37 days |
| 2019 | 32 days |
| 2020 | 28 days |
| 2021 | 27 days |
| 2022 | 24 days |
| 2023 | 23 days |
| 2024 | 41 days |
| 2025 | 28 days |
| 2026 | 27 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
89 years with a frostAcross 89 years with a frost, the median last spring frost at Alta 1 NNW falls on 20 June and the median first autumn frost on 31 August, which leaves a median of 73 days between them.
In 1993 to 2025 the median growing season was 86 days. That is 65 days more than in 1910 to 1957.
Fitted over all years, the growing season changes by +6.5 days per decade at this station.
| Measure | Median, all years | Earliest period (1910 to 1957) | Recent period (1993 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 20 June | 22 June | 19 June | 3 days earlier | -0.7 days per decade |
| First autumn frost | 31 August | 12 July | 9 September | 59 days later | +5.9 days per decade |
| Growing days | 73 days | 21 days | 86 days | 65 days more | +6.5 days per decade |
A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.
Rainfall Return Levels
91 years, 1910 to 2025A day with at least 27.3 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 55.5 mm (2.2 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 27.3 mm (1.1 in) | |
| 5 years | 34.2 mm (1.3 in) | |
| 10 years | 39.0 mm (1.5 in) | |
| 25 years | 45.4 mm (1.8 in) | |
| 50 years | 50.3 mm (2.0 in) | |
| 100 years | 55.5 mm (2.2 in) | Longer than the 91 years of record |
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 91 years of values from 1910 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: 68.6 mm (2.7 in) in 1912; 44.5 mm (1.8 in) in 1911; 44.5 mm (1.8 in) in 1988.
Station Changes
2 suspected2 changes were suspected in the annual mean temperature of Alta 1 NNW, at 1992 and 2017. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1992 ran 0.4 C (0.7 F) lower than in the years before (likely change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 2017 ran 0.3 C (0.5 F) lower than in the years before (possible change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1992 | -0.4 | -0.7 | likely | 5 |
| 2017 | -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
2010 to 2025 against 1961 to 1990Over 2010 to 2025, Alta 1 NNW had a mean temperature of 4.9 C (40.9 F) and 617.6 mm (24.3 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Alva 5 ESE (United States, 542 km away), Cascade 1 NW (United States, 409 km away) and New Meadows Rs (United States, 439 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Alva 5 ESE | United States | 542 km (337 mi) | 5.3 C (41.5 F) | 610.8 mm (24.0 in) | 0.82 |
| Cascade 1 NW | United States | 409 km (254 mi) | 5.0 C (40.9 F) | 564.8 mm (22.2 in) | 0.87 |
| New Meadows Rs | United States | 439 km (273 mi) | 5.1 C (41.2 F) | 601.3 mm (23.7 in) | 0.93 |
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).