Alta 1 NNW Threshold Days by Year (USC00480140)
15 fixed thresholds counted per year at Alta 1 NNW (USC00480140): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Alta 1 NNW Thresholds
- Alta 1 NNW: days with a maximum temperature at or below 0 C (32 F) in 109 years, most in 1964 with 106.
- Alta 1 NNW: days with a maximum temperature at or above 30 C (86 F) in 101 years, most in 2022 with 29.
- Alta 1 NNW: nights with a minimum temperature at or below 0 C (32 F) in 101 years, most in 1975 with 271.
- Alta 1 NNW: nights with a minimum temperature at or below -10 C (14 F) in 101 years, most in 1977 with 122.
- 15 fixed thresholds have at least one qualifying day at Alta 1 NNW.
Days at or above 30 C (86 F)
101 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1910 | 4 | 6.4 |
| 1911 | 3 | 6.4 |
| 1914 | 1 | 6.4 |
| 1916 | 1 | 6.4 |
| 1917 | 2 | 6.4 |
| 1918 | 11 | 6.4 |
| 1919 | 23 | 6.4 |
| 1920 | 2 | 6.2 |
| 1921 | 3 | 6.2 |
| 1922 | 5 | 6.2 |
| 1923 | 6 | 6.2 |
| 1925 | 8 | 6.2 |
| 1926 | 12 | 6.2 |
| 1927 | 2 | 6.2 |
| 1928 | 7 | 6.2 |
| 1929 | 11 | 6.2 |
| 1930 | 10 | 18.3 |
| 1931 | 26 | 18.3 |
| 1932 | 11 | 18.3 |
| 1933 | 24 | 18.3 |
| 1934 | 21 | 18.3 |
| 1935 | 21 | 18.3 |
| 1936 | 24 | 18.3 |
| 1937 | 25 | 18.3 |
| 1938 | 2 | 18.3 |
| 1939 | 19 | 18.3 |
| 1940 | 18 | 9.3 |
| 1948 | 6 | 9.3 |
| 1949 | 4 | 9.3 |
| 1950 | 3 | 7.3 |
| 1951 | 7 | 7.3 |
| 1952 | 3 | 7.3 |
| 1953 | 7 | 7.3 |
| 1954 | 15 | 7.3 |
| 1955 | 12 | 7.3 |
| 1956 | 5 | 7.3 |
| 1957 | 1 | 7.3 |
| 1958 | 11 | 7.3 |
| 1959 | 9 | 7.3 |
| 1960 | 15 | 8.6 |
| 1961 | 22 | 8.6 |
| 1962 | 4 | 8.6 |
| 1963 | 4 | 8.6 |
| 1964 | 5 | 8.6 |
| 1965 | 1 | 8.6 |
| 1966 | 6 | 8.6 |
| 1967 | 7 | 8.6 |
| 1968 | 8 | 8.6 |
| 1969 | 14 | 8.6 |
| 1970 | 13 | 11 |
| 1971 | 19 | 11 |
| 1972 | 11 | 11 |
| 1973 | 7 | 11 |
| 1974 | 15 | 11 |
| 1975 | 9 | 11 |
| 1976 | 11 | 11 |
| 1977 | 8 | 11 |
| 1978 | 9 | 11 |
| 1979 | 8 | 11 |
| 1980 | 4 | 6.7 |
| 1981 | 20 | 6.7 |
| 1982 | 2 | 6.7 |
| 1983 | 2 | 6.7 |
| 1984 | 1 | 6.7 |
| 1985 | 10 | 6.7 |
| 1986 | 4 | 6.7 |
| 1988 | 12 | 6.7 |
| 1989 | 5 | 6.7 |
| 1990 | 5 | 5.4 |
| 1994 | 11 | 5.4 |
| 1995 | 2 | 5.4 |
| 1996 | 8 | 5.4 |
| 1997 | 2 | 5.4 |
| 1998 | 7 | 5.4 |
| 1999 | 3 | 5.4 |
| 2000 | 15 | 13.1 |
| 2001 | 14 | 13.1 |
| 2002 | 11 | 13.1 |
| 2003 | 25 | 13.1 |
| 2005 | 8 | 13.1 |
| 2006 | 14 | 13.1 |
| 2007 | 24 | 13.1 |
| 2008 | 4 | 13.1 |
| 2009 | 3 | 13.1 |
| 2010 | 2 | 8.4 |
| 2011 | 4 | 8.4 |
| 2012 | 14 | 8.4 |
| 2013 | 16 | 8.4 |
| 2014 | 5 | 8.4 |
| 2015 | 11 | 8.4 |
| 2016 | 7 | 8.4 |
| 2017 | 8 | 8.4 |
| 2018 | 9 | 8.4 |
| 2019 | 8 | 8.4 |
| 2020 | 7 | 13.6 |
| 2021 | 19 | 13.6 |
| 2022 | 29 | 13.6 |
| 2023 | 6 | 13.6 |
| 2024 | 13 | 13.6 |
| 2025 | 8 | 13.6 |
| 2026 | 13 | 13.6 |
| Year | First date | Last date |
|---|---|---|
| 1910 | 1910-07-14 | 1910-07-25 |
| 1911 | 1911-08-17 | 1911-08-19 |
| 1914 | 1914-07-25 | 1914-07-25 |
| 1916 | 1916-07-07 | 1916-07-07 |
| 1917 | 1917-07-09 | 1917-07-26 |
| 1918 | 1918-06-11 | 1918-08-02 |
| 1919 | 1919-05-28 | 1919-08-25 |
| 1920 | 1920-08-15 | 1920-08-16 |
| 1921 | 1921-07-08 | 1921-07-20 |
| 1922 | 1922-07-14 | 1922-09-22 |
| 1923 | 1923-07-20 | 1923-09-09 |
| 1925 | 1925-07-09 | 1925-08-20 |
| 1926 | 1926-06-26 | 1926-08-26 |
| 1927 | 1927-06-26 | 1927-07-19 |
| 1928 | 1928-07-25 | 1928-08-17 |
| 1929 | 1929-07-19 | 1929-08-27 |
| 1930 | 1930-07-05 | 1930-08-18 |
| 1931 | 1931-06-28 | 1931-08-24 |
| 1932 | 1932-07-17 | 1932-08-19 |
| 1933 | 1933-07-04 | 1933-08-17 |
| 1934 | 1934-07-14 | 1934-08-28 |
| 1935 | 1935-07-11 | 1935-09-21 |
| 1936 | 1936-06-20 | 1936-08-31 |
| 1937 | 1937-06-21 | 1937-09-18 |
| 1938 | 1938-07-31 | 1938-08-12 |
| 1939 | 1939-07-09 | 1939-08-28 |
| 1940 | 1940-06-18 | 1940-08-31 |
| 1948 | 1948-07-10 | 1948-09-14 |
| 1949 | 1949-08-01 | 1949-08-07 |
| 1950 | 1950-09-02 | 1950-09-04 |
| 1951 | 1951-07-14 | 1951-07-25 |
| 1952 | 1952-07-23 | 1952-09-03 |
| 1953 | 1953-07-12 | 1953-08-13 |
| 1954 | 1954-06-21 | 1954-08-30 |
| 1955 | 1955-07-15 | 1955-09-07 |
| 1956 | 1956-07-09 | 1956-09-19 |
| 1957 | 1957-07-10 | 1957-07-10 |
| 1958 | 1958-08-02 | 1958-09-07 |
| 1959 | 1959-07-17 | 1959-09-12 |
| 1960 | 1960-07-15 | 1960-08-20 |
| 1961 | 1961-06-17 | 1961-08-23 |
| 1962 | 1962-07-11 | 1962-08-15 |
| 1963 | 1963-07-03 | 1963-08-14 |
| 1964 | 1964-07-08 | 1964-07-20 |
| 1965 | 1965-07-15 | 1965-07-15 |
| 1966 | 1966-07-18 | 1966-08-25 |
| 1967 | 1967-07-11 | 1967-09-04 |
| 1968 | 1968-07-07 | 1968-08-08 |
| 1969 | 1969-07-27 | 1969-09-01 |
| 1970 | 1970-06-25 | 1970-08-25 |
| 1971 | 1971-07-14 | 1971-08-27 |
| 1972 | 1972-07-08 | 1972-08-13 |
| 1973 | 1973-07-03 | 1973-08-19 |
| 1974 | 1974-06-13 | 1974-07-27 |
| 1975 | 1975-07-02 | 1975-07-28 |
| 1976 | 1976-06-29 | 1976-07-24 |
| 1977 | 1977-06-04 | 1977-08-16 |
| 1978 | 1978-07-14 | 1978-08-09 |
| 1979 | 1979-06-12 | 1979-09-07 |
| 1980 | 1980-07-23 | 1980-07-27 |
| 1981 | 1981-06-25 | 1981-08-29 |
| 1982 | 1982-07-21 | 1982-08-07 |
| 1983 | 1983-08-06 | 1983-08-07 |
| 1984 | 1984-07-19 | 1984-07-19 |
| 1985 | 1985-07-03 | 1985-07-22 |
| 1986 | 1986-07-08 | 1986-08-22 |
| 1988 | 1988-06-24 | 1988-08-26 |
| 1989 | 1989-07-06 | 1989-07-31 |
| 1990 | 1990-06-30 | 1990-09-14 |
| 1994 | 1994-06-20 | 1994-08-07 |
| 1995 | 1995-08-28 | 1995-08-29 |
| 1996 | 1996-07-02 | 1996-09-04 |
| 1997 | 1997-06-26 | 1997-08-03 |
| 1998 | 1998-07-16 | 1998-08-06 |
| 1999 | 1999-07-06 | 1999-08-02 |
| 2000 | 2000-07-12 | 2000-09-15 |
| 2001 | 2001-06-30 | 2001-09-04 |
| 2002 | 2002-06-25 | 2002-09-03 |
| 2003 | 2003-05-29 | 2003-08-26 |
| 2005 | 2005-07-12 | 2005-08-07 |
| 2006 | 2006-06-07 | 2006-08-22 |
| 2007 | 2007-06-28 | 2007-09-03 |
| 2008 | 2008-07-20 | 2008-08-05 |
| 2009 | 2009-07-23 | 2009-08-22 |
| 2010 | 2010-07-16 | 2010-08-26 |
| 2011 | 2011-07-03 | 2011-08-27 |
| 2012 | 2012-06-30 | 2012-08-28 |
| 2013 | 2013-06-28 | 2013-08-20 |
| 2014 | 2014-07-08 | 2014-08-11 |
| 2015 | 2015-06-23 | 2015-08-25 |
| 2016 | 2016-06-29 | 2016-08-31 |
| 2017 | 2017-07-05 | 2017-09-03 |
| 2018 | 2018-07-05 | 2018-08-12 |
| 2019 | 2019-07-21 | 2019-09-05 |
| 2020 | 2020-08-16 | 2020-09-05 |
| 2021 | 2021-06-13 | 2021-09-09 |
| 2022 | 2022-07-08 | 2022-09-07 |
| 2023 | 2023-07-22 | 2023-08-17 |
| 2024 | 2024-07-09 | 2024-09-02 |
| 2025 | 2025-07-01 | 2025-08-20 |
| 2026 | 2026-07-11 | 2026-08-09 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 101 | 29 | 2022 | 13 |
| 35 C (95 F): Days | 8 | 2 | 1933 | 1 |
| 90 F (32.2 C): Days | 60 | 13 | 1931 | 7 |
| 0 C (32 F): Ice days (max | 109 | 106 | 1964 | 23 |
| 0 C (32 F): Frost days (min | 101 | 271 | 1975 | 117 |
| -10 C (14 F): Days with min | 101 | 122 | 1977 | 29 |
| -20 C (-4 F): Days with min | 100 | 43 | 1911 | 1 |
| -30 C (-22 F): Days with min | 43 | 11 | 1917 | 1 |
| -40 C (-40 F): Days with min | 5 | 2 | 1933 | 2 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 92 | 32 | 1983 | 9 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 61 | 4 | 1971 | 1 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 1 | 1 | 1912 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 86 | 22 | 1975 | 2 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 33 | 4 | 1971 | 1 |
| 50 cm (19.7 in): Days with 50 cm or more snowfall | 1 | 1 | 2019 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1910.
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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.
Data as of . Last revised (2026-10-12).