Heron 2 NW Weather Records (USC00244084)
Record envelope, standing records and threshold days for Heron 2 NW (USC00244084), Montana, United States, with 115 years of record.
Key Facts for Heron 2 NW
- Heron 2 NW (USC00244084) is a weather station in Montana, United States at 48.08 latitude and -116.00 longitude, 683 m (2,240 ft) above sea level.
- The station reports from 1912 to 2026, 115 years of record.
- 1,464 records set at Heron 2 NW still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Heron 2 NW tied a daily record high minimum temperature of 11.1 C (52.0 F) on 29 May 2026.
About the Station
- Location: Montana, United States, 48.08 latitude, -116.00 longitude.
- Elevation: 683 m (2,240 ft).
- Period of record: 1912 to 2026, 115 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 16.1 C (61.0 F) | -39.4 C (-38.9 F) | 5.6 C (42.1 F) | -13.3 C (8.1 F) |
| Feb | 15.0 C (59.0 F) | -35.6 C (-32.1 F) | 10.0 C (50.0 F) | -7.8 C (18.0 F) |
| Mar | 22.8 C (73.0 F) | -30.0 C (-22.0 F) | 13.9 C (57.0 F) | -8.9 C (16.0 F) |
| Apr | 31.1 C (88.0 F) | -18.3 C (-0.9 F) | 27.2 C (81.0 F) | -5.0 C (23.0 F) |
| May | 35.6 C (96.1 F) | -7.2 C (19.0 F) | 30.0 C (86.0 F) | -0.6 C (30.9 F) |
| Jun | 38.9 C (102.0 F) | -3.9 C (25.0 F) | 28.9 C (84.0 F) | -0.6 C (30.9 F) |
| Jul | 40.6 C (105.1 F) | -1.7 C (28.9 F) | 33.3 C (91.9 F) | 4.4 C (39.9 F) |
| Aug | 41.1 C (106.0 F) | -6.1 C (21.0 F) | 33.3 C (91.9 F) | 2.2 C (36.0 F) |
| Sep | 36.1 C (97.0 F) | -12.8 C (9.0 F) | 27.2 C (81.0 F) | -1.7 C (28.9 F) |
| Oct | 30.6 C (87.1 F) | -15.6 C (3.9 F) | 23.3 C (73.9 F) | 0.6 C (33.1 F) |
| Nov | 20.0 C (68.0 F) | -25.6 C (-14.1 F) | n/a | n/a |
| Dec | 14.4 C (57.9 F) | -37.2 C (-35.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1912 | 12 |
| 1913 | 19 |
| 1914 | 23 |
| 1915 | 12 |
| 1916 | 19 |
| 1917 | 9 |
| 1918 | 27 |
| 1919 | 36 |
| 1920 | 12 |
| 1921 | 20 |
| 1922 | 22 |
| 1923 | 7 |
| 1924 | 54 |
| 1925 | 23 |
| 1926 | 34 |
| 1927 | 13 |
| 1928 | 22 |
| 1929 | 21 |
| 1930 | 23 |
| 1931 | 17 |
| 1932 | 17 |
| 1933 | 22 |
| 1934 | 30 |
| 1935 | 24 |
| 1936 | 38 |
| 1937 | 15 |
| 1938 | 26 |
| 1939 | 10 |
| 1940 | 10 |
| 1941 | 7 |
| 1942 | 11 |
| 1943 | 27 |
| 1944 | 27 |
| 1945 | 14 |
| 1946 | 11 |
| 1947 | 9 |
| 1948 | 10 |
| 1949 | 16 |
| 1950 | 22 |
| 1951 | 8 |
| 1952 | 6 |
| 1953 | 15 |
| 1954 | 14 |
| 1955 | 27 |
| 1956 | 9 |
| 1957 | 9 |
| 1958 | 12 |
| 1959 | 13 |
| 1960 | 16 |
| 1961 | 14 |
| 1962 | 11 |
| 1963 | 10 |
| 1964 | 13 |
| 1965 | 15 |
| 1966 | 9 |
| 1967 | 10 |
| 1968 | 12 |
| 1969 | 12 |
| 1970 | 6 |
| 1971 | 7 |
| 1972 | 12 |
| 1973 | 11 |
| 1974 | 9 |
| 1975 | 5 |
| 1976 | 2 |
| 1977 | 10 |
| 1978 | 6 |
| 1979 | 10 |
| 1980 | 13 |
| 1981 | 11 |
| 1982 | 8 |
| 1983 | 13 |
| 1984 | 3 |
| 1985 | 25 |
| 1986 | 12 |
| 1987 | 13 |
| 1988 | 11 |
| 1989 | 7 |
| 1990 | 12 |
| 1991 | 3 |
| 1992 | 18 |
| 1993 | 10 |
| 1994 | 2 |
| 1995 | 16 |
| 1996 | 3 |
| 1997 | 10 |
| 1998 | 6 |
| 1999 | 8 |
| 2000 | 3 |
| 2001 | 3 |
| 2002 | 14 |
| 2003 | 7 |
| 2004 | 3 |
| 2005 | 7 |
| 2006 | 10 |
| 2007 | 6 |
| 2008 | 7 |
| 2009 | 4 |
| 2018 | 9 |
| 2019 | 10 |
| 2020 | 18 |
| 2021 | 16 |
| 2022 | 11 |
| 2023 | 9 |
| 2024 | 10 |
| 2025 | 22 |
| 2026 | 7 |
All-Time Record Progression
7 new records| Date | Kind | Detail |
|---|---|---|
| 1958-08-17 | Record high minimum temperature | Record high minimum temperature 19.4 C (66.9 F) |
| 1961-08-04 | Record high maximum temperature | Record high maximum temperature 41.1 C (106.0 F) |
| 1970-08-02 | Record daily precipitation | Record daily precipitation 74.7 mm (2.9 in) |
| 1992-06-13 | Record daily precipitation | Record daily precipitation 81.8 mm (3.2 in) |
| 2021-08-02 | Record high minimum temperature | Record high minimum temperature 20.0 C (68.0 F) |
| 2023-08-18 | Record high minimum temperature | Record high minimum temperature 20.6 C (69.1 F) |
| 2024-01-13 | Record low maximum temperature | Record low maximum temperature -21.1 C (-6.0 F) |
Wettest Day of Each Month
Jun: 81.8 mm (3.2 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 57.9 mm (2.3 in) | 7 January 2009 |
| Feb | 47.8 mm (1.9 in) | 3 February 1963 |
| Mar | 40.9 mm (1.6 in) | 17 March 1921 |
| Apr | 34.8 mm (1.4 in) | 23 April 1996 |
| May | 71.1 mm (2.8 in) | 27 May 1998 |
| Jun | 81.8 mm (3.2 in) | 13 June 1992 |
| Jul | 47.8 mm (1.9 in) | 3 July 2019 |
| Aug | 74.7 mm (2.9 in) | 2 August 1970 |
| Sep | 43.9 mm (1.7 in) | 15 September 1968 |
| Oct | 45.0 mm (1.8 in) | 9 October 1955 |
| Nov | 55.1 mm (2.2 in) | 24 November 1964 |
| Dec | 58.9 mm (2.3 in) | 9 December 1922 |
Period of Record Coverage
1912 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1912 | 324 | 89% | No |
| 1913 | 354 | 97% | Yes |
| 1914 | 357 | 98% | Yes |
| 1915 | 362 | 99% | Yes |
| 1916 | 358 | 98% | Yes |
| 1917 | 362 | 99% | Yes |
| 1918 | 343 | 94% | Yes |
| 1919 | 364 | 100% | Yes |
| 1920 | 332 | 91% | Yes |
| 1921 | 362 | 99% | Yes |
| 1922 | 365 | 100% | Yes |
| 1923 | 323 | 88% | No |
| 1924 | 360 | 98% | Yes |
| 1925 | 360 | 99% | Yes |
| 1926 | 360 | 99% | Yes |
| 1927 | 353 | 97% | Yes |
| 1928 | 355 | 97% | Yes |
| 1929 | 354 | 97% | Yes |
| 1930 | 361 | 99% | Yes |
| 1931 | 362 | 99% | Yes |
| 1932 | 366 | 100% | Yes |
| 1933 | 365 | 100% | Yes |
| 1934 | 364 | 100% | Yes |
| 1935 | 365 | 100% | Yes |
| 1936 | 364 | 99% | Yes |
| 1937 | 363 | 99% | Yes |
| 1938 | 363 | 99% | Yes |
| 1939 | 273 | 75% | No |
| 1940 | 334 | 91% | Yes |
| 1941 | 365 | 100% | Yes |
| 1942 | 364 | 100% | Yes |
| 1943 | 364 | 100% | Yes |
| 1944 | 350 | 96% | Yes |
| 1945 | 334 | 92% | Yes |
| 1946 | 365 | 100% | Yes |
| 1947 | 365 | 100% | Yes |
| 1948 | 360 | 98% | Yes |
| 1949 | 358 | 98% | Yes |
| 1950 | 355 | 97% | Yes |
| 1951 | 342 | 94% | Yes |
| 1952 | 363 | 99% | Yes |
| 1953 | 364 | 100% | Yes |
| 1954 | 363 | 99% | Yes |
| 1955 | 364 | 100% | Yes |
| 1956 | 364 | 99% | Yes |
| 1957 | 363 | 99% | Yes |
| 1958 | 363 | 99% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 363 | 99% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 364 | 100% | Yes |
| 1966 | 364 | 100% | Yes |
| 1967 | 364 | 100% | Yes |
| 1968 | 364 | 99% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 364 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 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 | 365 | 100% | Yes |
| 1985 | 364 | 100% | Yes |
| 1986 | 362 | 99% | Yes |
| 1987 | 363 | 99% | Yes |
| 1988 | 366 | 100% | Yes |
| 1989 | 365 | 100% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 365 | 100% | Yes |
| 1993 | 365 | 100% | Yes |
| 1994 | 364 | 100% | Yes |
| 1995 | 365 | 100% | Yes |
| 1996 | 366 | 100% | Yes |
| 1997 | 332 | 91% | Yes |
| 1998 | 365 | 100% | Yes |
| 1999 | 365 | 100% | Yes |
| 2000 | 362 | 99% | Yes |
| 2001 | 364 | 100% | Yes |
| 2002 | 362 | 99% | Yes |
| 2003 | 364 | 100% | Yes |
| 2004 | 365 | 100% | Yes |
| 2005 | 365 | 100% | Yes |
| 2006 | 364 | 100% | Yes |
| 2007 | 359 | 98% | Yes |
| 2008 | 365 | 100% | Yes |
| 2009 | 243 | 67% | No |
| 2017 | 3 | 1% | No |
| 2018 | 364 | 100% | Yes |
| 2019 | 364 | 100% | Yes |
| 2020 | 360 | 98% | Yes |
| 2021 | 364 | 100% | Yes |
| 2022 | 364 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 365 | 100% | Yes |
| 2026 | 282 | 77% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 29 May 2026 | Heron 2 NW, US | daily high min (Tie) | 11.1 C (52.0 F) | tie | 36 years | 5 of 100 (Routine) |
| 13 May 2026 | Heron 2 NW, US | daily high min (Tie) | 10.0 C (50.0 F) | tie | 96 years | 9 of 100 (Routine) |
| 15 April 2026 | Heron 2 NW, US | daily rain | 15.0 mm (0.6 in) | 1.0 mm (0.04 in) | 97 years | 20 of 100 (Routine) |
| 21 March 2026 | Heron 2 NW, US | daily high min | 4.4 C (39.9 F) | 0.5 C (0.9 F) | 68 years | 31 of 100 (Routine) |
| 20 March 2026 | Heron 2 NW, US | daily high min | 6.7 C (44.1 F) | 2.8 C (5.0 F) | 19 years | 21 of 100 (Routine) |
| 19 March 2026 | Heron 2 NW, US | daily high min | 4.4 C (39.9 F) | 2.2 C (4.0 F) | 31 years | 23 of 100 (Routine) |
| 8 March 2026 | Heron 2 NW, US | daily high min | 5.0 C (41.0 F) | 3.3 C (5.9 F) | 43 years | 29 of 100 (Routine) |
| 7 March 2026 | Heron 2 NW, US | daily high min | 2.8 C (37.0 F) | 1.1 C (2.0 F) | 48 years | 26 of 100 (Routine) |
| 5 March 2026 | Heron 2 NW, US | daily high min | 3.3 C (37.9 F) | 0.5 C (0.9 F) | 57 years | 28 of 100 (Routine) |
| 4 March 2026 | Heron 2 NW, US | daily high min (Tie) | 3.3 C (37.9 F) | tie | 33 years | 5 of 100 (Routine) |
| 18 February 2026 | Heron 2 NW, US | daily snowfall | 14.5 cm (5.7 in) | 4.3 cm (1.7 in) | 58 years | 33 of 100 (Routine) |
| 14 February 2026 | Heron 2 NW, US | daily high min (Tie) | 0.6 C (33.1 F) | tie | 114 years | 10 of 100 (Routine) |
| 9 February 2026 | Heron 2 NW, US | daily high min | 1.7 C (35.1 F) | 0.6 C (1.1 F) | 30 years | 19 of 100 (Routine) |
| 2 February 2026 | Heron 2 NW, US | daily high min (Tie) | 0.6 C (33.1 F) | tie | 98 years | 9 of 100 (Routine) |
| 4 January 2026 | Heron 2 NW, US | daily high min (Tie) | 0.6 C (33.1 F) | tie | 108 years | 10 of 100 (Routine) |
| 25 December 2025 | Heron 2 NW, US | daily high min (Tie) | 2.2 C (36.0 F) | tie | 75 years | 8 of 100 (Routine) |
| 17 December 2025 | Heron 2 NW, US | daily high max | 7.8 C (46.0 F) | 0.6 C (1.1 F) | 108 years | 41 of 100 (Notable) |
| 17 December 2025 | Heron 2 NW, US | daily high min (Tie) | 3.3 C (37.9 F) | tie | 63 years | 7 of 100 (Routine) |
| 16 December 2025 | Heron 2 NW, US | daily high max | 13.3 C (55.9 F) | 5.5 C (9.9 F) | 83 years | 47 of 100 (Notable) |
| 16 December 2025 | Heron 2 NW, US | daily high min | 5.0 C (41.0 F) | 1.7 C (3.1 F) | 63 years | 30 of 100 (Routine) |
Climate Trend
93 complete years, 1913 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1913 | 6.4 C | -0.47 C |
| 1914 | 7.5 C | +0.67 C |
| 1915 | 7.8 C | +0.88 C |
| 1916 | 5.5 C | -1.33 C |
| 1917 | 6.6 C | -0.30 C |
| 1919 | 6.3 C | -0.57 C |
| 1921 | 6.6 C | -0.32 C |
| 1922 | 5.7 C | -1.22 C |
| 1924 | 5.5 C | -1.35 C |
| 1925 | 7.1 C | +0.27 C |
| 1926 | 6.5 C | -0.36 C |
| 1927 | 6.7 C | -0.13 C |
| 1928 | 7.6 C | +0.68 C |
| 1930 | 6.2 C | -0.66 C |
| 1931 | 6.8 C | -0.04 C |
| 1932 | 6.2 C | -0.72 C |
| 1933 | 6.7 C | -0.19 C |
| 1934 | 8.9 C | +2.02 C |
| 1935 | 6.1 C | -0.80 C |
| 1936 | 6.1 C | -0.81 C |
| 1937 | 5.6 C | -1.30 C |
| 1938 | 7.3 C | +0.40 C |
| 1941 | 6.9 C | +0.07 C |
| 1942 | 5.7 C | -1.14 C |
| 1943 | 5.1 C | -1.79 C |
| 1946 | 7.1 C | +0.18 C |
| 1948 | 6.2 C | -0.67 C |
| 1949 | 6.3 C | -0.53 C |
| 1950 | 6.4 C | -0.44 C |
| 1952 | 7.1 C | +0.27 C |
| 1953 | 7.8 C | +0.90 C |
| 1954 | 6.5 C | -0.40 C |
| 1955 | 5.3 C | -1.62 C |
| 1956 | 6.4 C | -0.49 C |
| 1957 | 6.2 C | -0.68 C |
| 1958 | 8.2 C | +1.31 C |
| 1959 | 6.0 C | -0.85 C |
| 1960 | 6.2 C | -0.70 C |
| 1961 | 7.4 C | +0.50 C |
| 1962 | 6.9 C | -0.01 C |
| 1963 | 7.4 C | +0.48 C |
| 1964 | 5.8 C | -1.03 C |
| 1965 | 6.7 C | -0.17 C |
| 1966 | 7.0 C | +0.08 C |
| 1967 | 7.5 C | +0.61 C |
| 1968 | 6.7 C | -0.18 C |
| 1969 | 6.3 C | -0.57 C |
| 1970 | 6.7 C | -0.13 C |
| 1971 | 6.4 C | -0.46 C |
| 1972 | 6.2 C | -0.69 C |
| 1973 | 7.0 C | +0.13 C |
| 1974 | 7.1 C | +0.22 C |
| 1975 | 6.0 C | -0.91 C |
| 1976 | 6.7 C | -0.22 C |
| 1977 | 6.7 C | -0.18 C |
| 1978 | 6.3 C | -0.53 C |
| 1979 | 6.7 C | -0.13 C |
| 1980 | 7.0 C | +0.17 C |
| 1981 | 7.5 C | +0.64 C |
| 1982 | 6.4 C | -0.52 C |
| 1983 | 7.0 C | +0.16 C |
| 1984 | 6.4 C | -0.45 C |
| 1985 | 5.3 C | -1.55 C |
| 1986 | 7.5 C | +0.61 C |
| 1987 | 7.8 C | +0.96 C |
| 1988 | 7.5 C | +0.64 C |
| 1989 | 7.0 C | +0.17 C |
| 1990 | 7.2 C | +0.37 C |
| 1991 | 7.1 C | +0.27 C |
| 1992 | 7.9 C | +1.00 C |
| 1993 | 6.1 C | -0.77 C |
| 1994 | 7.3 C | +0.45 C |
| 1995 | 7.2 C | +0.29 C |
| 1996 | 5.8 C | -1.06 C |
| 1998 | 8.4 C | +1.50 C |
| 1999 | 7.4 C | +0.52 C |
| 2000 | 6.7 C | -0.20 C |
| 2001 | 7.2 C | +0.33 C |
| 2002 | 6.7 C | -0.17 C |
| 2003 | 7.9 C | +1.02 C |
| 2004 | 7.8 C | +0.91 C |
| 2005 | 7.0 C | +0.16 C |
| 2006 | 8.2 C | +1.29 C |
| 2007 | 7.9 C | +1.04 C |
| 2008 | 6.3 C | -0.54 C |
| 2018 | 7.6 C | +0.77 C |
| 2019 | 7.0 C | +0.08 C |
| 2020 | 7.8 C | +0.93 C |
| 2021 | 8.3 C | +1.39 C |
| 2022 | 7.1 C | +0.19 C |
| 2023 | 8.3 C | +1.45 C |
| 2024 | 8.2 C | +1.35 C |
| 2025 | 8.8 C | +1.95 C |
The annual mean temperature here has risen by 0.1 C (0.1 to 0.2) per decade over 1913 to 2025. In Fahrenheit: 0.2 F (0.1 to 0.3) per decade. The slope is a straight line fitted to 93 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 | 1913 to 2025 | 93 | Rise |
| Mean daily maximum | -0.04 C (-0.10 to 0.02) per decade | -0.07 F (-0.18 to 0.03) per decade | 1913 to 2025 | 93 | Not clearly different from zero |
| Mean daily minimum | 0.3 C (0.2 to 0.3) per decade | 0.5 F (0.4 to 0.6) per decade | 1913 to 2025 | 93 | 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
1912 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 41.1 C (106.0 F) | 1961 | 36.1 C (97.0 F) | 108 |
| Coldest night (TNn) | -39.4 C (-38.9 F) | 1927 | -24.1 C (-11.5 F) | 108 |
| Wettest day (Rx1day) | 81.8 mm (3.2 in) | 1992 | 36.8 mm (1.4 in) | 108 |
| Wettest five days (Rx5day) | 127.1 mm (5.0 in) | 1974 | 75.4 mm (3.0 in) | 107 |
| Longest dry spell (CDD) | 89 days | 1928 | 29 days | 108 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1912 | 36.1 C (97.0 F) |
| 1913 | 35.6 C (96.1 F) |
| 1914 | 37.8 C (100.0 F) |
| 1915 | 36.1 C (97.0 F) |
| 1916 | 35.0 C (95.0 F) |
| 1917 | 36.1 C (97.0 F) |
| 1918 | 39.4 C (102.9 F) |
| 1919 | 40.0 C (104.0 F) |
| 1920 | 38.9 C (102.0 F) |
| 1921 | 37.2 C (99.0 F) |
| 1922 | 39.4 C (102.9 F) |
| 1923 | 37.2 C (99.0 F) |
| 1924 | 40.6 C (105.1 F) |
| 1925 | 38.9 C (102.0 F) |
| 1926 | 38.9 C (102.0 F) |
| 1927 | 38.3 C (100.9 F) |
| 1928 | 39.4 C (102.9 F) |
| 1929 | 37.8 C (100.0 F) |
| 1930 | 38.9 C (102.0 F) |
| 1931 | 38.9 C (102.0 F) |
| 1932 | 37.8 C (100.0 F) |
| 1933 | 37.2 C (99.0 F) |
| 1934 | 40.6 C (105.1 F) |
| 1935 | 36.7 C (98.1 F) |
| 1936 | 36.7 C (98.1 F) |
| 1937 | 36.1 C (97.0 F) |
| 1938 | 38.9 C (102.0 F) |
| 1939 | 40.6 C (105.1 F) |
| 1940 | 38.3 C (100.9 F) |
| 1941 | 39.4 C (102.9 F) |
| 1942 | 34.4 C (93.9 F) |
| 1943 | 33.3 C (91.9 F) |
| 1944 | 36.1 C (97.0 F) |
| 1945 | 37.2 C (99.0 F) |
| 1946 | 37.8 C (100.0 F) |
| 1947 | 36.1 C (97.0 F) |
| 1948 | 32.8 C (91.0 F) |
| 1949 | 37.8 C (100.0 F) |
| 1950 | 35.6 C (96.1 F) |
| 1951 | 36.7 C (98.1 F) |
| 1952 | 34.4 C (93.9 F) |
| 1953 | 33.3 C (91.9 F) |
| 1954 | 34.4 C (93.9 F) |
| 1955 | 36.1 C (97.0 F) |
| 1956 | 35.6 C (96.1 F) |
| 1957 | 31.7 C (89.1 F) |
| 1958 | 36.7 C (98.1 F) |
| 1959 | 38.3 C (100.9 F) |
| 1960 | 38.3 C (100.9 F) |
| 1961 | 41.1 C (106.0 F) |
| 1962 | 34.4 C (93.9 F) |
| 1963 | 36.7 C (98.1 F) |
| 1964 | 36.1 C (97.0 F) |
| 1965 | 35.6 C (96.1 F) |
| 1966 | 35.6 C (96.1 F) |
| 1967 | 37.8 C (100.0 F) |
| 1968 | 35.6 C (96.1 F) |
| 1969 | 33.9 C (93.0 F) |
| 1970 | 34.4 C (93.9 F) |
| 1971 | 36.1 C (97.0 F) |
| 1972 | 36.1 C (97.0 F) |
| 1973 | 36.1 C (97.0 F) |
| 1974 | 35.0 C (95.0 F) |
| 1975 | 36.7 C (98.1 F) |
| 1976 | 34.4 C (93.9 F) |
| 1977 | 36.7 C (98.1 F) |
| 1978 | 35.0 C (95.0 F) |
| 1979 | 37.2 C (99.0 F) |
| 1980 | 35.0 C (95.0 F) |
| 1981 | 34.4 C (93.9 F) |
| 1982 | 33.9 C (93.0 F) |
| 1983 | 32.8 C (91.0 F) |
| 1984 | 37.2 C (99.0 F) |
| 1985 | 36.7 C (98.1 F) |
| 1986 | 35.6 C (96.1 F) |
| 1987 | 35.0 C (95.0 F) |
| 1988 | 35.0 C (95.0 F) |
| 1989 | 35.6 C (96.1 F) |
| 1990 | 34.4 C (93.9 F) |
| 1991 | 35.6 C (96.1 F) |
| 1992 | 35.0 C (95.0 F) |
| 1993 | 33.9 C (93.0 F) |
| 1994 | 37.8 C (100.0 F) |
| 1995 | 31.7 C (89.1 F) |
| 1996 | 34.4 C (93.9 F) |
| 1997 | 32.8 C (91.0 F) |
| 1998 | 35.6 C (96.1 F) |
| 1999 | 35.0 C (95.0 F) |
| 2000 | 33.9 C (93.0 F) |
| 2001 | 33.9 C (93.0 F) |
| 2002 | 35.0 C (95.0 F) |
| 2003 | 37.2 C (99.0 F) |
| 2004 | 36.7 C (98.1 F) |
| 2005 | 35.0 C (95.0 F) |
| 2006 | 36.1 C (97.0 F) |
| 2007 | 36.7 C (98.1 F) |
| 2008 | 37.2 C (99.0 F) |
| 2009 | 34.4 C (93.9 F) |
| 2017 | 0.0 C (32.0 F) |
| 2018 | 38.9 C (102.0 F) |
| 2019 | 33.3 C (91.9 F) |
| 2020 | 35.6 C (96.1 F) |
| 2021 | 38.9 C (102.0 F) |
| 2022 | 35.0 C (95.0 F) |
| 2023 | 36.7 C (98.1 F) |
| 2024 | 37.2 C (99.0 F) |
| 2025 | 33.9 C (93.0 F) |
| 2026 | 33.3 C (91.9 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1912 | -15.6 C (3.9 F) |
| 1913 | -25.0 C (-13.0 F) |
| 1914 | -25.0 C (-13.0 F) |
| 1915 | -22.8 C (-9.0 F) |
| 1916 | -28.9 C (-20.0 F) |
| 1917 | -33.3 C (-27.9 F) |
| 1918 | -23.9 C (-11.0 F) |
| 1919 | -31.7 C (-25.1 F) |
| 1920 | -16.1 C (3.0 F) |
| 1921 | -20.0 C (-4.0 F) |
| 1922 | -32.8 C (-27.0 F) |
| 1923 | -26.1 C (-15.0 F) |
| 1924 | -34.4 C (-29.9 F) |
| 1925 | -13.3 C (8.1 F) |
| 1926 | -22.8 C (-9.0 F) |
| 1927 | -39.4 C (-38.9 F) |
| 1928 | -18.9 C (-2.0 F) |
| 1929 | -29.4 C (-20.9 F) |
| 1930 | -29.4 C (-20.9 F) |
| 1931 | -22.2 C (-8.0 F) |
| 1932 | -26.7 C (-16.1 F) |
| 1933 | -30.0 C (-22.0 F) |
| 1934 | -12.2 C (10.0 F) |
| 1935 | -32.8 C (-27.0 F) |
| 1936 | -35.6 C (-32.1 F) |
| 1937 | -36.1 C (-33.0 F) |
| 1938 | -21.1 C (-6.0 F) |
| 1939 | -27.8 C (-18.0 F) |
| 1940 | -19.4 C (-2.9 F) |
| 1941 | -20.6 C (-5.1 F) |
| 1942 | -28.9 C (-20.0 F) |
| 1943 | -33.3 C (-27.9 F) |
| 1944 | -20.0 C (-4.0 F) |
| 1945 | -17.8 C (0.0 F) |
| 1946 | -20.6 C (-5.1 F) |
| 1947 | -25.0 C (-13.0 F) |
| 1948 | -23.9 C (-11.0 F) |
| 1949 | -27.8 C (-18.0 F) |
| 1950 | -35.0 C (-31.0 F) |
| 1951 | -23.3 C (-9.9 F) |
| 1952 | -26.1 C (-15.0 F) |
| 1953 | -11.1 C (12.0 F) |
| 1954 | -29.4 C (-20.9 F) |
| 1955 | -30.0 C (-22.0 F) |
| 1956 | -30.0 C (-22.0 F) |
| 1957 | -30.6 C (-23.1 F) |
| 1958 | -18.9 C (-2.0 F) |
| 1959 | -25.0 C (-13.0 F) |
| 1960 | -28.9 C (-20.0 F) |
| 1961 | -25.6 C (-14.1 F) |
| 1962 | -29.4 C (-20.9 F) |
| 1963 | -26.1 C (-15.0 F) |
| 1964 | -30.0 C (-22.0 F) |
| 1965 | -22.8 C (-9.0 F) |
| 1966 | -22.2 C (-8.0 F) |
| 1967 | -18.3 C (-0.9 F) |
| 1968 | -37.2 C (-35.0 F) |
| 1969 | -23.3 C (-9.9 F) |
| 1970 | -21.7 C (-7.1 F) |
| 1971 | -22.2 C (-8.0 F) |
| 1972 | -30.0 C (-22.0 F) |
| 1973 | -26.7 C (-16.1 F) |
| 1974 | -23.9 C (-11.0 F) |
| 1975 | -28.9 C (-20.0 F) |
| 1976 | -21.1 C (-6.0 F) |
| 1977 | -22.8 C (-9.0 F) |
| 1978 | -35.6 C (-32.1 F) |
| 1979 | -36.1 C (-33.0 F) |
| 1980 | -25.0 C (-13.0 F) |
| 1981 | -25.0 C (-13.0 F) |
| 1982 | -26.1 C (-15.0 F) |
| 1983 | -25.6 C (-14.1 F) |
| 1984 | -23.3 C (-9.9 F) |
| 1985 | -29.4 C (-20.9 F) |
| 1986 | -18.3 C (-0.9 F) |
| 1987 | -20.6 C (-5.1 F) |
| 1988 | -21.7 C (-7.1 F) |
| 1989 | -25.0 C (-13.0 F) |
| 1990 | -33.9 C (-29.0 F) |
| 1991 | -21.1 C (-6.0 F) |
| 1992 | -18.9 C (-2.0 F) |
| 1993 | -26.1 C (-15.0 F) |
| 1994 | -19.4 C (-2.9 F) |
| 1995 | -17.2 C (1.0 F) |
| 1996 | -30.6 C (-23.1 F) |
| 1997 | -18.9 C (-2.0 F) |
| 1998 | -23.9 C (-11.0 F) |
| 1999 | -13.3 C (8.1 F) |
| 2000 | -18.3 C (-0.9 F) |
| 2001 | -21.1 C (-6.0 F) |
| 2002 | -18.3 C (-0.9 F) |
| 2003 | -15.6 C (3.9 F) |
| 2004 | -31.7 C (-25.1 F) |
| 2005 | -23.9 C (-11.0 F) |
| 2006 | -17.8 C (0.0 F) |
| 2007 | -24.4 C (-11.9 F) |
| 2008 | -24.4 C (-11.9 F) |
| 2009 | -24.4 C (-11.9 F) |
| 2017 | -13.9 C (7.0 F) |
| 2018 | -22.8 C (-9.0 F) |
| 2019 | -21.7 C (-7.1 F) |
| 2020 | -13.9 C (7.0 F) |
| 2021 | -18.9 C (-2.0 F) |
| 2022 | -27.8 C (-18.0 F) |
| 2023 | -18.3 C (-0.9 F) |
| 2024 | -30.0 C (-22.0 F) |
| 2025 | -22.2 C (-8.0 F) |
| 2026 | -13.3 C (8.1 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1912 | 44.2 mm (1.7 in) |
| 1913 | 31.8 mm (1.3 in) |
| 1914 | 31.8 mm (1.3 in) |
| 1915 | 39.4 mm (1.6 in) |
| 1916 | 40.6 mm (1.6 in) |
| 1917 | 34.0 mm (1.3 in) |
| 1918 | 35.6 mm (1.4 in) |
| 1919 | 55.9 mm (2.2 in) |
| 1920 | 47.8 mm (1.9 in) |
| 1921 | 40.9 mm (1.6 in) |
| 1922 | 58.9 mm (2.3 in) |
| 1923 | 31.0 mm (1.2 in) |
| 1924 | 28.2 mm (1.1 in) |
| 1925 | 44.5 mm (1.8 in) |
| 1926 | 33.5 mm (1.3 in) |
| 1927 | 34.0 mm (1.3 in) |
| 1928 | 25.4 mm (1.0 in) |
| 1929 | 43.2 mm (1.7 in) |
| 1930 | 46.2 mm (1.8 in) |
| 1931 | 34.0 mm (1.3 in) |
| 1932 | 38.6 mm (1.5 in) |
| 1933 | 37.8 mm (1.5 in) |
| 1934 | 40.1 mm (1.6 in) |
| 1935 | 50.8 mm (2.0 in) |
| 1936 | 44.5 mm (1.8 in) |
| 1937 | 31.0 mm (1.2 in) |
| 1938 | 30.5 mm (1.2 in) |
| 1939 | 35.6 mm (1.4 in) |
| 1940 | 26.7 mm (1.1 in) |
| 1941 | 39.6 mm (1.6 in) |
| 1942 | 51.3 mm (2.0 in) |
| 1943 | 34.8 mm (1.4 in) |
| 1944 | 18.8 mm (0.7 in) |
| 1945 | 41.1 mm (1.6 in) |
| 1946 | 50.5 mm (2.0 in) |
| 1947 | 28.7 mm (1.1 in) |
| 1948 | 29.7 mm (1.2 in) |
| 1949 | 36.8 mm (1.4 in) |
| 1950 | 34.8 mm (1.4 in) |
| 1951 | 42.7 mm (1.7 in) |
| 1952 | 26.4 mm (1.0 in) |
| 1953 | 45.2 mm (1.8 in) |
| 1954 | 56.9 mm (2.2 in) |
| 1955 | 53.3 mm (2.1 in) |
| 1956 | 28.7 mm (1.1 in) |
| 1957 | 36.8 mm (1.4 in) |
| 1958 | 31.5 mm (1.2 in) |
| 1959 | 38.6 mm (1.5 in) |
| 1960 | 41.4 mm (1.6 in) |
| 1961 | 33.5 mm (1.3 in) |
| 1962 | 28.4 mm (1.1 in) |
| 1963 | 47.8 mm (1.9 in) |
| 1964 | 58.4 mm (2.3 in) |
| 1965 | 28.2 mm (1.1 in) |
| 1966 | 33.5 mm (1.3 in) |
| 1967 | 48.0 mm (1.9 in) |
| 1968 | 43.9 mm (1.7 in) |
| 1969 | 29.2 mm (1.1 in) |
| 1970 | 74.7 mm (2.9 in) |
| 1971 | 36.8 mm (1.4 in) |
| 1972 | 33.8 mm (1.3 in) |
| 1973 | 31.8 mm (1.3 in) |
| 1974 | 41.7 mm (1.6 in) |
| 1975 | 45.2 mm (1.8 in) |
| 1976 | 55.1 mm (2.2 in) |
| 1977 | 25.1 mm (1.0 in) |
| 1978 | 35.1 mm (1.4 in) |
| 1979 | 32.3 mm (1.3 in) |
| 1980 | 39.1 mm (1.5 in) |
| 1981 | 32.3 mm (1.3 in) |
| 1982 | 43.9 mm (1.7 in) |
| 1983 | 30.0 mm (1.2 in) |
| 1984 | 35.6 mm (1.4 in) |
| 1985 | 35.8 mm (1.4 in) |
| 1986 | 41.9 mm (1.6 in) |
| 1987 | 32.0 mm (1.3 in) |
| 1988 | 26.7 mm (1.1 in) |
| 1989 | 51.8 mm (2.0 in) |
| 1990 | 33.8 mm (1.3 in) |
| 1991 | 28.2 mm (1.1 in) |
| 1992 | 81.8 mm (3.2 in) |
| 1993 | 40.4 mm (1.6 in) |
| 1994 | 39.9 mm (1.6 in) |
| 1995 | 43.4 mm (1.7 in) |
| 1996 | 44.2 mm (1.7 in) |
| 1997 | 27.7 mm (1.1 in) |
| 1998 | 71.1 mm (2.8 in) |
| 1999 | 34.5 mm (1.4 in) |
| 2000 | 29.7 mm (1.2 in) |
| 2001 | 22.6 mm (0.9 in) |
| 2002 | 35.6 mm (1.4 in) |
| 2003 | 30.7 mm (1.2 in) |
| 2004 | 35.1 mm (1.4 in) |
| 2005 | 34.8 mm (1.4 in) |
| 2006 | 41.1 mm (1.6 in) |
| 2007 | 49.5 mm (1.9 in) |
| 2008 | 41.1 mm (1.6 in) |
| 2009 | 57.9 mm (2.3 in) |
| 2017 | 23.6 mm (0.9 in) |
| 2018 | 23.4 mm (0.9 in) |
| 2019 | 47.8 mm (1.9 in) |
| 2020 | 37.6 mm (1.5 in) |
| 2021 | 66.3 mm (2.6 in) |
| 2022 | 43.4 mm (1.7 in) |
| 2023 | 29.7 mm (1.2 in) |
| 2024 | 39.9 mm (1.6 in) |
| 2025 | 34.0 mm (1.3 in) |
| 2026 | 24.1 mm (0.9 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1912 | 77.4 mm (3.0 in) |
| 1913 | 60.4 mm (2.4 in) |
| 1914 | 65.3 mm (2.6 in) |
| 1915 | 62.5 mm (2.5 in) |
| 1916 | 62.7 mm (2.5 in) |
| 1917 | 104.6 mm (4.1 in) |
| 1918 | 78.5 mm (3.1 in) |
| 1919 | 95.1 mm (3.7 in) |
| 1920 | 67.1 mm (2.6 in) |
| 1921 | 96.5 mm (3.8 in) |
| 1922 | 72.1 mm (2.8 in) |
| 1923 | 75.2 mm (3.0 in) |
| 1924 | 61.0 mm (2.4 in) |
| 1925 | 89.7 mm (3.5 in) |
| 1926 | 57.9 mm (2.3 in) |
| 1927 | 75.4 mm (3.0 in) |
| 1928 | 67.6 mm (2.7 in) |
| 1929 | 102.3 mm (4.0 in) |
| 1930 | 69.5 mm (2.7 in) |
| 1931 | 61.4 mm (2.4 in) |
| 1932 | 77.7 mm (3.1 in) |
| 1933 | 120.6 mm (4.7 in) |
| 1934 | 99.3 mm (3.9 in) |
| 1935 | 125.0 mm (4.9 in) |
| 1936 | 96.0 mm (3.8 in) |
| 1937 | 69.4 mm (2.7 in) |
| 1938 | 61.5 mm (2.4 in) |
| 1939 | 80.4 mm (3.2 in) |
| 1940 | 78.8 mm (3.1 in) |
| 1941 | 81.7 mm (3.2 in) |
| 1942 | 71.4 mm (2.8 in) |
| 1943 | 59.0 mm (2.3 in) |
| 1944 | 35.3 mm (1.4 in) |
| 1945 | 111.7 mm (4.4 in) |
| 1946 | 93.5 mm (3.7 in) |
| 1947 | 86.9 mm (3.4 in) |
| 1948 | 65.9 mm (2.6 in) |
| 1949 | 77.4 mm (3.0 in) |
| 1950 | 74.2 mm (2.9 in) |
| 1951 | 97.4 mm (3.8 in) |
| 1952 | 53.3 mm (2.1 in) |
| 1953 | 114.2 mm (4.5 in) |
| 1954 | 72.9 mm (2.9 in) |
| 1955 | 88.7 mm (3.5 in) |
| 1956 | 66.9 mm (2.6 in) |
| 1957 | 93.2 mm (3.7 in) |
| 1958 | 63.0 mm (2.5 in) |
| 1959 | 114.3 mm (4.5 in) |
| 1960 | 89.5 mm (3.5 in) |
| 1961 | 72.9 mm (2.9 in) |
| 1962 | 59.2 mm (2.3 in) |
| 1963 | 85.0 mm (3.3 in) |
| 1964 | 108.7 mm (4.3 in) |
| 1965 | 55.1 mm (2.2 in) |
| 1966 | 88.9 mm (3.5 in) |
| 1967 | 59.2 mm (2.3 in) |
| 1968 | 120.4 mm (4.7 in) |
| 1969 | 53.4 mm (2.1 in) |
| 1970 | 89.9 mm (3.5 in) |
| 1971 | 66.3 mm (2.6 in) |
| 1972 | 81.0 mm (3.2 in) |
| 1973 | 74.7 mm (2.9 in) |
| 1974 | 127.1 mm (5.0 in) |
| 1975 | 88.1 mm (3.5 in) |
| 1976 | 76.7 mm (3.0 in) |
| 1977 | 70.7 mm (2.8 in) |
| 1978 | 60.9 mm (2.4 in) |
| 1979 | 67.3 mm (2.6 in) |
| 1980 | 74.3 mm (2.9 in) |
| 1981 | 96.9 mm (3.8 in) |
| 1982 | 110.1 mm (4.3 in) |
| 1983 | 67.9 mm (2.7 in) |
| 1984 | 56.4 mm (2.2 in) |
| 1985 | 67.3 mm (2.6 in) |
| 1986 | 87.2 mm (3.4 in) |
| 1987 | 68.0 mm (2.7 in) |
| 1988 | 57.0 mm (2.2 in) |
| 1989 | 106.9 mm (4.2 in) |
| 1990 | 79.6 mm (3.1 in) |
| 1991 | 62.4 mm (2.5 in) |
| 1992 | 97.5 mm (3.8 in) |
| 1993 | 61.7 mm (2.4 in) |
| 1994 | 74.2 mm (2.9 in) |
| 1995 | 83.3 mm (3.3 in) |
| 1996 | 108.5 mm (4.3 in) |
| 1997 | 106.0 mm (4.2 in) |
| 1998 | 91.2 mm (3.6 in) |
| 1999 | 72.3 mm (2.8 in) |
| 2000 | 48.8 mm (1.9 in) |
| 2001 | 60.8 mm (2.4 in) |
| 2002 | 56.4 mm (2.2 in) |
| 2003 | 55.6 mm (2.2 in) |
| 2004 | 95.9 mm (3.8 in) |
| 2005 | 76.5 mm (3.0 in) |
| 2006 | 87.9 mm (3.5 in) |
| 2007 | 91.0 mm (3.6 in) |
| 2008 | 77.6 mm (3.1 in) |
| 2009 | 99.1 mm (3.9 in) |
| 2017 | n/a |
| 2018 | 52.0 mm (2.0 in) |
| 2019 | 52.6 mm (2.1 in) |
| 2020 | 68.1 mm (2.7 in) |
| 2021 | 83.1 mm (3.3 in) |
| 2022 | 104.8 mm (4.1 in) |
| 2023 | 57.4 mm (2.3 in) |
| 2024 | 51.6 mm (2.0 in) |
| 2025 | 86.7 mm (3.4 in) |
| 2026 | 50.6 mm (2.0 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1912 | 20 days |
| 1913 | 21 days |
| 1914 | 33 days |
| 1915 | 20 days |
| 1916 | 25 days |
| 1917 | 78 days |
| 1918 | 31 days |
| 1919 | 31 days |
| 1920 | 24 days |
| 1921 | 36 days |
| 1922 | 32 days |
| 1923 | 18 days |
| 1924 | 39 days |
| 1925 | 51 days |
| 1926 | 40 days |
| 1927 | 44 days |
| 1928 | 89 days |
| 1929 | 55 days |
| 1930 | 24 days |
| 1931 | 38 days |
| 1932 | 28 days |
| 1933 | 25 days |
| 1934 | 36 days |
| 1935 | 40 days |
| 1936 | 52 days |
| 1937 | 19 days |
| 1938 | 59 days |
| 1939 | 64 days |
| 1940 | 37 days |
| 1941 | 30 days |
| 1942 | 31 days |
| 1943 | 24 days |
| 1944 | 22 days |
| 1945 | 44 days |
| 1946 | 36 days |
| 1947 | 21 days |
| 1948 | 29 days |
| 1949 | 19 days |
| 1950 | 21 days |
| 1951 | 31 days |
| 1952 | 47 days |
| 1953 | 36 days |
| 1954 | 24 days |
| 1955 | 41 days |
| 1956 | 21 days |
| 1957 | 25 days |
| 1958 | 23 days |
| 1959 | 36 days |
| 1960 | 40 days |
| 1961 | 22 days |
| 1962 | 27 days |
| 1963 | 33 days |
| 1964 | 15 days |
| 1965 | 22 days |
| 1966 | 19 days |
| 1967 | 55 days |
| 1968 | 24 days |
| 1969 | 59 days |
| 1970 | 29 days |
| 1971 | 22 days |
| 1972 | 16 days |
| 1973 | 39 days |
| 1974 | 39 days |
| 1975 | 16 days |
| 1976 | 14 days |
| 1977 | 22 days |
| 1978 | 32 days |
| 1979 | 33 days |
| 1980 | 20 days |
| 1981 | 17 days |
| 1982 | 15 days |
| 1983 | 28 days |
| 1984 | 27 days |
| 1985 | 41 days |
| 1986 | 33 days |
| 1987 | 39 days |
| 1988 | 27 days |
| 1989 | 22 days |
| 1990 | 37 days |
| 1991 | 31 days |
| 1992 | 24 days |
| 1993 | 21 days |
| 1994 | 29 days |
| 1995 | 27 days |
| 1996 | 20 days |
| 1997 | 21 days |
| 1998 | 19 days |
| 1999 | 18 days |
| 2000 | 32 days |
| 2001 | 33 days |
| 2002 | 24 days |
| 2003 | 21 days |
| 2004 | 16 days |
| 2005 | 39 days |
| 2006 | 27 days |
| 2007 | 31 days |
| 2008 | 26 days |
| 2009 | 18 days |
| 2017 | 1 day |
| 2018 | 53 days |
| 2019 | 17 days |
| 2020 | 72 days |
| 2021 | 34 days |
| 2022 | 40 days |
| 2023 | 29 days |
| 2024 | 26 days |
| 2025 | 27 days |
| 2026 | 43 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
93 years with a frostAcross 93 years with a frost, the median last spring frost at Heron 2 NW falls on 1 June and the median first autumn frost on 7 September, which leaves a median of 99 days between them.
In 1986 to 2025 the median growing season was 115 days. That is 59 days more than in 1913 to 1952.
Fitted over all years, the growing season changes by +7.0 days per decade at this station.
| Measure | Median, all years | Earliest period (1913 to 1952) | Recent period (1986 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 1 June | 14 June | 23 May | 22 days earlier | -2.5 days per decade |
| First autumn frost | 7 September | 11 August | 17 September | 37 days later | +4.5 days per decade |
| Growing days | 99 days | 56 days | 115 days | 59 days more | +7.0 days per decade |
A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.
Rainfall Return Levels
102 years, 1913 to 2025A day with at least 37.0 mm (1.5 in) of rain is expected about once in 2 years. A day with at least 75.7 mm (3.0 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 37.0 mm (1.5 in) | |
| 5 years | 46.5 mm (1.8 in) | |
| 10 years | 53.1 mm (2.1 in) | |
| 25 years | 61.9 mm (2.4 in) | |
| 50 years | 68.7 mm (2.7 in) | |
| 100 years | 75.7 mm (3.0 in) |
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 102 years of values from 1913 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: 81.8 mm (3.2 in) in 1992; 74.7 mm (2.9 in) in 1970; 71.1 mm (2.8 in) in 1998.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Heron 2 NW, at 1955. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1955 ran 0.4 C (0.7 F) lower than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1955 | -0.4 | -0.7 | 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
2002 to 2025 against 1961 to 1990Over 2002 to 2025, Heron 2 NW had a mean temperature of 7.7 C (45.8 F) and 816.6 mm (32.1 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Kaslo (Canada, 215 km away), New Denver (Canada, 236 km away) and South Slocan (Canada, 190 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Kaslo | Canada | 215 km (134 mi) | 7.2 C (45.0 F) | 856.7 mm (33.7 in) | 0.85 |
| New Denver | Canada | 236 km (147 mi) | 7.5 C (45.5 F) | 862.2 mm (33.9 in) | 0.87 |
| South Slocan | Canada | 190 km (118 mi) | 7.7 C (45.9 F) | 821.0 mm (32.3 in) | 0.90 |
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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-12).