Flagstaff AP Threshold Days by Year (USW00003103)
15 fixed thresholds counted per year at Flagstaff AP (USW00003103): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Flagstaff AP Thresholds
- Flagstaff AP: days with a maximum temperature at or above 30 C (86 F) in 98 years, most in 2002 with 38.
- Flagstaff AP: days with a maximum temperature at or below 0 C (32 F) in 98 years, most in 1932 with 31.
- Flagstaff AP: nights with a minimum temperature at or below 0 C (32 F) in 98 years, most in 1971 with 237.
- Flagstaff AP: nights with a minimum temperature at or below -10 C (14 F) in 98 years, most in 1964 with 73.
- 15 fixed thresholds have at least one qualifying day at Flagstaff AP.
Days at or above 30 C (86 F)
98 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1894 | 9 | 9.3 |
| 1895 | 8 | 9.3 |
| 1897 | 11 | 9.3 |
| 1924 | 8 | 10.3 |
| 1925 | 7 | 10.3 |
| 1926 | 10 | 10.3 |
| 1927 | 11 | 10.3 |
| 1928 | 11 | 10.3 |
| 1929 | 15 | 10.3 |
| 1930 | 14 | 16.5 |
| 1931 | 11 | 16.5 |
| 1932 | 20 | 16.5 |
| 1933 | 12 | 16.5 |
| 1934 | 18 | 16.5 |
| 1935 | 9 | 16.5 |
| 1936 | 26 | 16.5 |
| 1937 | 18 | 16.5 |
| 1938 | 15 | 16.5 |
| 1939 | 22 | 16.5 |
| 1940 | 33 | 24.5 |
| 1942 | 16 | 24.5 |
| 1950 | 13 | 10.1 |
| 1951 | 11 | 10.1 |
| 1952 | 1 | 10.1 |
| 1953 | 10 | 10.1 |
| 1954 | 12 | 10.1 |
| 1955 | 7 | 10.1 |
| 1956 | 13 | 10.1 |
| 1957 | 8 | 10.1 |
| 1958 | 14 | 10.1 |
| 1959 | 12 | 10.1 |
| 1960 | 24 | 10.9 |
| 1961 | 18 | 10.9 |
| 1962 | 8 | 10.9 |
| 1963 | 15 | 10.9 |
| 1964 | 10 | 10.9 |
| 1965 | 4 | 10.9 |
| 1966 | 8 | 10.9 |
| 1967 | 3 | 10.9 |
| 1968 | 12 | 10.9 |
| 1969 | 7 | 10.9 |
| 1970 | 25 | 22.7 |
| 1971 | 19 | 22.7 |
| 1972 | 15 | 22.7 |
| 1973 | 27 | 22.7 |
| 1974 | 37 | 22.7 |
| 1975 | 16 | 22.7 |
| 1976 | 15 | 22.7 |
| 1977 | 27 | 22.7 |
| 1978 | 24 | 22.7 |
| 1979 | 22 | 22.7 |
| 1980 | 30 | 15.5 |
| 1981 | 21 | 15.5 |
| 1982 | 7 | 15.5 |
| 1983 | 8 | 15.5 |
| 1984 | 6 | 15.5 |
| 1985 | 23 | 15.5 |
| 1986 | 9 | 15.5 |
| 1987 | 7 | 15.5 |
| 1988 | 20 | 15.5 |
| 1989 | 24 | 15.5 |
| 1990 | 28 | 17.1 |
| 1991 | 25 | 17.1 |
| 1992 | 16 | 17.1 |
| 1993 | 19 | 17.1 |
| 1994 | 13 | 17.1 |
| 1995 | 22 | 17.1 |
| 1996 | 26 | 17.1 |
| 1997 | 8 | 17.1 |
| 1998 | 11 | 17.1 |
| 1999 | 3 | 17.1 |
| 2000 | 29 | 19.4 |
| 2001 | 13 | 19.4 |
| 2002 | 38 | 19.4 |
| 2003 | 21 | 19.4 |
| 2004 | 3 | 19.4 |
| 2005 | 13 | 19.4 |
| 2006 | 17 | 19.4 |
| 2007 | 25 | 19.4 |
| 2008 | 15 | 19.4 |
| 2009 | 20 | 19.4 |
| 2010 | 9 | 14.7 |
| 2011 | 12 | 14.7 |
| 2012 | 14 | 14.7 |
| 2013 | 13 | 14.7 |
| 2014 | 9 | 14.7 |
| 2015 | 13 | 14.7 |
| 2016 | 17 | 14.7 |
| 2017 | 19 | 14.7 |
| 2018 | 19 | 14.7 |
| 2019 | 22 | 14.7 |
| 2020 | 37 | 30.3 |
| 2021 | 18 | 30.3 |
| 2022 | 19 | 30.3 |
| 2023 | 30 | 30.3 |
| 2024 | 37 | 30.3 |
| 2025 | 38 | 30.3 |
| 2026 | 33 | 30.3 |
| Year | First date | Last date |
|---|---|---|
| 1894 | 1894-07-01 | 1894-07-14 |
| 1895 | 1895-07-08 | 1895-08-19 |
| 1897 | 1897-06-07 | 1897-08-22 |
| 1924 | 1924-06-14 | 1924-07-02 |
| 1925 | 1925-07-12 | 1925-07-18 |
| 1926 | 1926-06-24 | 1926-08-27 |
| 1927 | 1927-06-22 | 1927-07-22 |
| 1928 | 1928-06-23 | 1928-08-21 |
| 1929 | 1929-06-19 | 1929-07-06 |
| 1930 | 1930-06-11 | 1930-08-27 |
| 1931 | 1931-06-27 | 1931-08-24 |
| 1932 | 1932-06-20 | 1932-08-07 |
| 1933 | 1933-06-11 | 1933-08-16 |
| 1934 | 1934-06-29 | 1934-08-03 |
| 1935 | 1935-06-20 | 1935-07-26 |
| 1936 | 1936-06-13 | 1936-08-23 |
| 1937 | 1937-06-20 | 1937-08-12 |
| 1938 | 1938-06-04 | 1938-08-22 |
| 1939 | 1939-06-11 | 1939-08-16 |
| 1940 | 1940-06-11 | 1940-08-12 |
| 1942 | 1942-06-22 | 1942-08-04 |
| 1950 | 1950-06-27 | 1950-09-02 |
| 1951 | 1951-05-26 | 1951-08-15 |
| 1952 | 1952-07-03 | 1952-07-03 |
| 1953 | 1953-06-22 | 1953-08-08 |
| 1954 | 1954-06-19 | 1954-08-29 |
| 1955 | 1955-06-07 | 1955-09-06 |
| 1956 | 1956-06-10 | 1956-09-18 |
| 1957 | 1957-06-24 | 1957-08-01 |
| 1958 | 1958-05-28 | 1958-08-31 |
| 1959 | 1959-06-17 | 1959-07-26 |
| 1960 | 1960-06-19 | 1960-08-19 |
| 1961 | 1961-06-14 | 1961-08-08 |
| 1962 | 1962-06-24 | 1962-08-16 |
| 1963 | 1963-07-01 | 1963-08-13 |
| 1964 | 1964-06-24 | 1964-08-07 |
| 1965 | 1965-07-03 | 1965-08-06 |
| 1966 | 1966-06-14 | 1966-08-05 |
| 1967 | 1967-06-30 | 1967-07-02 |
| 1968 | 1968-06-17 | 1968-07-21 |
| 1969 | 1969-06-30 | 1969-08-09 |
| 1970 | 1970-06-19 | 1970-08-30 |
| 1971 | 1971-06-20 | 1971-07-31 |
| 1972 | 1972-06-29 | 1972-08-22 |
| 1973 | 1973-06-08 | 1973-09-05 |
| 1974 | 1974-05-27 | 1974-09-09 |
| 1975 | 1975-06-14 | 1975-08-09 |
| 1976 | 1976-06-19 | 1976-08-31 |
| 1977 | 1977-05-31 | 1977-09-09 |
| 1978 | 1978-06-09 | 1978-08-08 |
| 1979 | 1979-06-27 | 1979-09-06 |
| 1980 | 1980-06-17 | 1980-08-11 |
| 1981 | 1981-06-06 | 1981-08-27 |
| 1982 | 1982-06-27 | 1982-09-02 |
| 1983 | 1983-07-04 | 1983-09-02 |
| 1984 | 1984-06-27 | 1984-08-30 |
| 1985 | 1985-06-07 | 1985-08-25 |
| 1986 | 1986-06-23 | 1986-08-20 |
| 1987 | 1987-06-13 | 1987-07-24 |
| 1988 | 1988-06-03 | 1988-08-18 |
| 1989 | 1989-06-15 | 1989-08-14 |
| 1990 | 1990-06-04 | 1990-09-13 |
| 1991 | 1991-06-18 | 1991-08-30 |
| 1992 | 1992-07-04 | 1992-08-19 |
| 1993 | 1993-06-14 | 1993-08-03 |
| 1994 | 1994-07-01 | 1994-08-05 |
| 1995 | 1995-07-06 | 1995-09-01 |
| 1996 | 1996-05-11 | 1996-08-31 |
| 1997 | 1997-07-02 | 1997-08-07 |
| 1998 | 1998-06-28 | 1998-08-28 |
| 1999 | 1999-06-29 | 1999-07-01 |
| 2000 | 2000-05-28 | 2000-09-16 |
| 2001 | 2001-06-07 | 2001-08-27 |
| 2002 | 2002-05-30 | 2002-08-26 |
| 2003 | 2003-05-27 | 2003-08-13 |
| 2004 | 2004-07-06 | 2004-07-12 |
| 2005 | 2005-06-20 | 2005-07-21 |
| 2006 | 2006-06-04 | 2006-07-25 |
| 2007 | 2007-06-15 | 2007-08-21 |
| 2008 | 2008-06-15 | 2008-08-28 |
| 2009 | 2009-06-28 | 2009-08-21 |
| 2010 | 2010-06-05 | 2010-08-15 |
| 2011 | 2011-06-22 | 2011-08-27 |
| 2012 | 2012-06-01 | 2012-08-15 |
| 2013 | 2013-06-07 | 2013-07-10 |
| 2014 | 2014-06-28 | 2014-07-26 |
| 2015 | 2015-06-17 | 2015-08-16 |
| 2016 | 2016-06-03 | 2016-07-29 |
| 2017 | 2017-06-16 | 2017-09-04 |
| 2018 | 2018-06-20 | 2018-08-07 |
| 2019 | 2019-06-29 | 2019-09-04 |
| 2020 | 2020-06-22 | 2020-09-07 |
| 2021 | 2021-06-13 | 2021-08-05 |
| 2022 | 2022-06-10 | 2022-09-08 |
| 2023 | 2023-07-01 | 2023-08-30 |
| 2024 | 2024-06-05 | 2024-09-28 |
| 2025 | 2025-06-11 | 2025-08-22 |
| 2026 | 2026-06-11 | 2026-09-10 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 98 | 38 | 2002 | 33 |
| 35 C (95 F): Days | 10 | 3 | 2023 | 3 |
| 90 F (32.2 C): Days | 72 | 15 | 1974 | 7 |
| 0 C (32 F): Ice days (max | 98 | 31 | 1932 | 3 |
| 0 C (32 F): Frost days (min | 98 | 237 | 1971 | 108 |
| -10 C (14 F): Days with min | 98 | 73 | 1964 | 8 |
| -20 C (-4 F): Days with min | 78 | 16 | 1937 | 2 |
| -30 C (-22 F): Days with min | 5 | 2 | 1937 | 1 |
| 20 C (68 F): Tropical nights (min | 2 | 4 | 1897 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 93 | 29 | 1965 | 13 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 85 | 11 | 1965 | 3 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 29 | 3 | 1951 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 73 | 18 | 1980 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 56 | 8 | 1991 | 1 |
| 50 cm (19.7 in): Days with 50 cm or more snowfall | 7 | 2 | 1967 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1894.
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 (2026-10-17).