Dannemora Threshold Days by Year
17 fixed thresholds counted per year at Dannemora (USC00301966): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Dannemora Thresholds
- Dannemora: nights with a minimum temperature at or below 0 C (32 F) in 113 years, most in 1926 with 189.
- Dannemora: nights with a minimum temperature at or below -10 C (14 F) in 113 years, most in 1914 with 97.
- Dannemora: nights with a minimum temperature at or below -20 C (-4 F) in 112 years, most in 1920 with 35.
- Dannemora: days with 10 mm (0.39 in) or more of precipitation in 110 years, most in 2003 with 56.
- 17 fixed thresholds have at least one qualifying day at Dannemora.
Days at or above 30 C (86 F)
103 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1906 | 7 | 9.3 |
| 1907 | 8 | 9.3 |
| 1908 | 17 | 9.3 |
| 1909 | 5 | 9.3 |
| 1910 | 4 | 12.4 |
| 1911 | 30 | 12.4 |
| 1912 | 12 | 12.4 |
| 1913 | 12 | 12.4 |
| 1914 | 9 | 12.4 |
| 1915 | 4 | 12.4 |
| 1916 | 16 | 12.4 |
| 1920 | 8 | 5.1 |
| 1922 | 5 | 5.1 |
| 1923 | 4 | 5.1 |
| 1924 | 3 | 5.1 |
| 1925 | 6 | 5.1 |
| 1928 | 4 | 5.1 |
| 1929 | 6 | 5.1 |
| 1930 | 5 | 8.5 |
| 1931 | 15 | 8.5 |
| 1932 | 6 | 8.5 |
| 1933 | 12 | 8.5 |
| 1934 | 8 | 8.5 |
| 1935 | 4 | 8.5 |
| 1936 | 1 | 8.5 |
| 1937 | 14 | 8.5 |
| 1938 | 11 | 8.5 |
| 1939 | 9 | 8.5 |
| 1940 | 3 | 18.1 |
| 1941 | 26 | 18.1 |
| 1942 | 13 | 18.1 |
| 1943 | 10 | 18.1 |
| 1944 | 24 | 18.1 |
| 1947 | 21 | 18.1 |
| 1948 | 14 | 18.1 |
| 1949 | 34 | 18.1 |
| 1950 | 12 | 15.5 |
| 1951 | 5 | 15.5 |
| 1952 | 22 | 15.5 |
| 1953 | 26 | 15.5 |
| 1954 | 3 | 15.5 |
| 1955 | 37 | 15.5 |
| 1956 | 6 | 15.5 |
| 1957 | 16 | 15.5 |
| 1958 | 4 | 15.5 |
| 1959 | 24 | 15.5 |
| 1960 | 13 | 10.9 |
| 1961 | 16 | 10.9 |
| 1962 | 10 | 10.9 |
| 1963 | 15 | 10.9 |
| 1964 | 14 | 10.9 |
| 1965 | 9 | 10.9 |
| 1966 | 10 | 10.9 |
| 1967 | 3 | 10.9 |
| 1968 | 9 | 10.9 |
| 1969 | 10 | 10.9 |
| 1970 | 12 | 13 |
| 1971 | 9 | 13 |
| 1972 | 4 | 13 |
| 1973 | 13 | 13 |
| 1974 | 5 | 13 |
| 1975 | 25 | 13 |
| 1976 | 11 | 13 |
| 1977 | 14 | 13 |
| 1978 | 22 | 13 |
| 1979 | 15 | 13 |
| 1980 | 9 | 9.8 |
| 1981 | 7 | 9.8 |
| 1987 | 11 | 9.8 |
| 1988 | 18 | 9.8 |
| 1989 | 4 | 9.8 |
| 1990 | 1 | 6.8 |
| 1991 | 10 | 6.8 |
| 1992 | 3 | 6.8 |
| 1993 | 4 | 6.8 |
| 1994 | 5 | 6.8 |
| 1995 | 13 | 6.8 |
| 1998 | 2 | 6.8 |
| 1999 | 16 | 6.8 |
| 2001 | 11 | 8.1 |
| 2002 | 16 | 8.1 |
| 2003 | 8 | 8.1 |
| 2004 | 1 | 8.1 |
| 2005 | 7 | 8.1 |
| 2006 | 8 | 8.1 |
| 2007 | 14 | 8.1 |
| 2008 | 6 | 8.1 |
| 2009 | 2 | 8.1 |
| 2010 | 14 | 10.1 |
| 2011 | 7 | 10.1 |
| 2012 | 11 | 10.1 |
| 2013 | 6 | 10.1 |
| 2014 | 2 | 10.1 |
| 2015 | 2 | 10.1 |
| 2016 | 20 | 10.1 |
| 2018 | 20 | 10.1 |
| 2019 | 9 | 10.1 |
| 2020 | 19 | 12.2 |
| 2021 | 13 | 12.2 |
| 2022 | 16 | 12.2 |
| 2023 | 8 | 12.2 |
| 2025 | 11 | 12.2 |
| 2026 | 6 | 12.2 |
| Year | First date | Last date |
|---|---|---|
| 1906 | 1906-05-18 | 1906-08-19 |
| 1907 | 1907-06-17 | 1907-08-12 |
| 1908 | 1908-06-08 | 1908-09-11 |
| 1909 | 1909-06-22 | 1909-08-25 |
| 1910 | 1910-07-06 | 1910-07-24 |
| 1911 | 1911-05-11 | 1911-08-08 |
| 1912 | 1912-07-03 | 1912-07-16 |
| 1913 | 1913-05-03 | 1913-09-03 |
| 1914 | 1914-05-26 | 1914-09-22 |
| 1915 | 1915-09-09 | 1915-09-16 |
| 1916 | 1916-07-12 | 1916-08-22 |
| 1920 | 1920-05-31 | 1920-09-26 |
| 1922 | 1922-06-08 | 1922-09-11 |
| 1923 | 1923-06-18 | 1923-06-21 |
| 1924 | 1924-07-12 | 1924-08-31 |
| 1925 | 1925-06-05 | 1925-08-08 |
| 1928 | 1928-07-09 | 1928-08-16 |
| 1929 | 1929-05-29 | 1929-09-03 |
| 1930 | 1930-06-05 | 1930-07-19 |
| 1931 | 1931-05-19 | 1931-09-13 |
| 1932 | 1932-05-16 | 1932-09-02 |
| 1933 | 1933-06-09 | 1933-08-01 |
| 1934 | 1934-06-05 | 1934-08-19 |
| 1935 | 1935-07-11 | 1935-08-18 |
| 1936 | 1936-07-12 | 1936-07-12 |
| 1937 | 1937-05-31 | 1937-09-24 |
| 1938 | 1938-06-21 | 1938-08-21 |
| 1939 | 1939-07-26 | 1939-09-17 |
| 1940 | 1940-07-26 | 1940-08-18 |
| 1941 | 1941-05-07 | 1941-09-23 |
| 1942 | 1942-06-11 | 1942-09-18 |
| 1943 | 1943-06-04 | 1943-09-06 |
| 1944 | 1944-05-04 | 1944-08-21 |
| 1947 | 1947-06-11 | 1947-09-11 |
| 1948 | 1948-06-29 | 1948-09-13 |
| 1949 | 1949-06-03 | 1949-10-11 |
| 1950 | 1950-06-07 | 1950-10-02 |
| 1951 | 1951-07-09 | 1951-09-14 |
| 1952 | 1952-06-14 | 1952-08-29 |
| 1953 | 1953-05-10 | 1953-09-05 |
| 1954 | 1954-06-22 | 1954-08-25 |
| 1955 | 1955-05-22 | 1955-09-19 |
| 1956 | 1956-06-12 | 1956-08-18 |
| 1957 | 1957-06-11 | 1957-08-03 |
| 1958 | 1958-07-01 | 1958-09-01 |
| 1959 | 1959-05-29 | 1959-09-07 |
| 1960 | 1960-06-17 | 1960-09-09 |
| 1961 | 1961-05-15 | 1961-09-23 |
| 1962 | 1962-05-18 | 1962-09-04 |
| 1963 | 1963-06-02 | 1963-07-29 |
| 1964 | 1964-05-24 | 1964-07-29 |
| 1965 | 1965-06-28 | 1965-09-22 |
| 1966 | 1966-06-24 | 1966-08-09 |
| 1967 | 1967-06-05 | 1967-07-28 |
| 1968 | 1968-07-01 | 1968-09-21 |
| 1969 | 1969-06-03 | 1969-08-16 |
| 1970 | 1970-05-01 | 1970-08-16 |
| 1971 | 1971-05-19 | 1971-08-19 |
| 1972 | 1972-07-12 | 1972-07-16 |
| 1973 | 1973-06-11 | 1973-09-06 |
| 1974 | 1974-06-10 | 1974-07-15 |
| 1975 | 1975-05-20 | 1975-08-26 |
| 1976 | 1976-04-18 | 1976-08-22 |
| 1977 | 1977-05-22 | 1977-08-30 |
| 1978 | 1978-05-27 | 1978-08-17 |
| 1979 | 1979-05-09 | 1979-08-02 |
| 1980 | 1980-05-23 | 1980-08-09 |
| 1981 | 1981-06-16 | 1981-08-03 |
| 1987 | 1987-05-30 | 1987-08-19 |
| 1988 | 1988-06-14 | 1988-08-14 |
| 1989 | 1989-07-24 | 1989-07-27 |
| 1990 | 1990-04-27 | 1990-04-27 |
| 1991 | 1991-06-27 | 1991-08-30 |
| 1992 | 1992-05-22 | 1992-08-26 |
| 1993 | 1993-07-06 | 1993-08-27 |
| 1994 | 1994-06-16 | 1994-07-21 |
| 1995 | 1995-06-18 | 1995-08-16 |
| 1998 | 1998-07-15 | 1998-07-16 |
| 1999 | 1999-05-31 | 1999-09-05 |
| 2001 | 2001-06-15 | 2001-08-10 |
| 2002 | 2002-04-18 | 2002-09-11 |
| 2003 | 2003-06-23 | 2003-07-05 |
| 2004 | 2004-06-09 | 2004-06-09 |
| 2005 | 2005-06-25 | 2005-08-04 |
| 2006 | 2006-06-18 | 2006-08-03 |
| 2007 | 2007-06-08 | 2007-09-25 |
| 2008 | 2008-06-10 | 2008-09-06 |
| 2009 | 2009-04-27 | 2009-08-18 |
| 2010 | 2010-05-25 | 2010-09-04 |
| 2011 | 2011-06-08 | 2011-09-03 |
| 2012 | 2012-06-20 | 2012-08-06 |
| 2013 | 2013-05-31 | 2013-09-11 |
| 2014 | 2014-07-01 | 2014-07-02 |
| 2015 | 2015-07-29 | 2015-07-30 |
| 2016 | 2016-05-27 | 2016-08-12 |
| 2018 | 2018-06-30 | 2018-09-06 |
| 2019 | 2019-07-03 | 2019-07-30 |
| 2020 | 2020-05-26 | 2020-08-12 |
| 2021 | 2021-05-20 | 2021-08-26 |
| 2022 | 2022-05-13 | 2022-08-30 |
| 2023 | 2023-06-01 | 2023-09-07 |
| 2025 | 2025-07-06 | 2025-08-13 |
| 2026 | 2026-06-12 | 2026-07-14 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 103 | 37 | 1955 | 6 |
| 35 C (95 F): Days | 16 | 6 | 1944 | 1 |
| 90 F (32.2 C): Days | 71 | 19 | 1953 | 3 |
| 0 C (32 F): Ice days (max | 107 | 122 | 1926 | 48 |
| 0 C (32 F): Frost days (min | 113 | 189 | 1926 | 97 |
| -10 C (14 F): Days with min | 113 | 97 | 1914 | 49 |
| -20 C (-4 F): Days with min | 112 | 35 | 1920 | 17 |
| -30 C (-22 F): Days with min | 37 | 6 | 1914 | 2 |
| 20 C (68 F): Tropical nights (min | 100 | 15 | 1949 | 4 |
| 25 C (77 F): Days with min | 6 | 1 | 1911 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 110 | 56 | 2003 | 23 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 110 | 14 | 1924 | 6 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 42 | 6 | 1920 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 2 | 1 | 1920 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 50 | 12 | 1933 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 28 | 3 | 1961 | 1 |
| 50 cm (19.7 in): Days with 50 cm or more snowfall | 2 | 1 | 1944 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1906.
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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.
Data as of . Last revised (2026-10-12).