Flagstaff AP Weather Records (USW00003103)
Record envelope, standing records and threshold days for Flagstaff AP (USW00003103), Arizona, United States, with 134 years of record.
Key Facts for Flagstaff AP
- Flagstaff AP (USW00003103) is a weather station in Arizona, United States at 35.14 latitude and -111.67 longitude, 2,133 m (6,999 ft) above sea level.
- The station reports from 1893 to 2026, 134 years of record.
- 1,464 records set at Flagstaff AP still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Flagstaff AP set a daily record precipitation of 50.3 mm (2.0 in) on 11 October 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Arizona, United States, 35.14 latitude, -111.67 longitude.
- Elevation: 2,133 m (6,999 ft).
- Period of record: 1893 to 2026, 134 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
18 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 18.9 C (66.0 F) | -34.4 C (-29.9 F) | 16.7 C (62.1 F) | -16.1 C (3.0 F) |
| Feb | 21.7 C (71.1 F) | -30.6 C (-23.1 F) | 21.1 C (70.0 F) | -15.6 C (3.9 F) |
| Mar | 28.9 C (84.0 F) | -26.7 C (-16.1 F) | 28.9 C (84.0 F) | -6.7 C (19.9 F) |
| Apr | 28.3 C (82.9 F) | -18.9 C (-2.0 F) | 20.6 C (69.1 F) | -4.4 C (24.1 F) |
| May | 33.9 C (93.0 F) | -10.0 C (14.0 F) | 27.8 C (82.0 F) | -3.3 C (26.1 F) |
| Jun | 35.6 C (96.1 F) | -5.6 C (21.9 F) | 31.7 C (89.1 F) | 2.8 C (37.0 F) |
| Jul | 37.2 C (99.0 F) | 0.0 C (32.0 F) | 33.3 C (91.9 F) | 1.1 C (34.0 F) |
| Aug | 35.0 C (95.0 F) | -4.4 C (24.1 F) | 32.2 C (90.0 F) | 7.2 C (45.0 F) |
| Sep | 32.8 C (91.0 F) | -5.6 C (21.9 F) | 30.0 C (86.0 F) | 3.9 C (39.0 F) |
| Oct | 29.4 C (84.9 F) | -18.9 C (-2.0 F) | 23.9 C (75.0 F) | 2.2 C (36.0 F) |
| Nov | 23.3 C (73.9 F) | -25.0 C (-13.0 F) | n/a | n/a |
| Dec | 20.0 C (68.0 F) | -30.6 C (-23.1 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1893 | 4 |
| 1894 | 15 |
| 1895 | 9 |
| 1896 | 22 |
| 1897 | 113 |
| 1898 | 35 |
| 1905 | 30 |
| 1906 | 25 |
| 1907 | 1 |
| 1923 | 1 |
| 1924 | 11 |
| 1925 | 11 |
| 1926 | 8 |
| 1927 | 11 |
| 1928 | 10 |
| 1929 | 16 |
| 1930 | 11 |
| 1931 | 22 |
| 1932 | 12 |
| 1933 | 17 |
| 1934 | 16 |
| 1935 | 15 |
| 1936 | 9 |
| 1937 | 22 |
| 1938 | 10 |
| 1939 | 10 |
| 1940 | 7 |
| 1941 | 6 |
| 1942 | 15 |
| 1943 | 14 |
| 1950 | 19 |
| 1951 | 13 |
| 1952 | 11 |
| 1953 | 11 |
| 1954 | 9 |
| 1955 | 17 |
| 1956 | 11 |
| 1957 | 8 |
| 1958 | 11 |
| 1959 | 10 |
| 1960 | 12 |
| 1961 | 14 |
| 1962 | 16 |
| 1963 | 13 |
| 1964 | 12 |
| 1965 | 20 |
| 1966 | 13 |
| 1967 | 13 |
| 1968 | 8 |
| 1969 | 20 |
| 1970 | 19 |
| 1971 | 36 |
| 1972 | 15 |
| 1973 | 11 |
| 1974 | 8 |
| 1975 | 25 |
| 1976 | 14 |
| 1977 | 21 |
| 1978 | 9 |
| 1979 | 18 |
| 1980 | 15 |
| 1981 | 11 |
| 1982 | 9 |
| 1983 | 4 |
| 1984 | 8 |
| 1985 | 17 |
| 1986 | 17 |
| 1987 | 11 |
| 1988 | 7 |
| 1989 | 30 |
| 1990 | 14 |
| 1991 | 18 |
| 1992 | 3 |
| 1993 | 2 |
| 1994 | 4 |
| 1995 | 15 |
| 1996 | 15 |
| 1997 | 8 |
| 1998 | 7 |
| 1999 | 9 |
| 2000 | 10 |
| 2001 | 6 |
| 2002 | 12 |
| 2003 | 9 |
| 2004 | 5 |
| 2005 | 6 |
| 2006 | 7 |
| 2007 | 17 |
| 2008 | 8 |
| 2009 | 13 |
| 2010 | 9 |
| 2011 | 19 |
| 2012 | 3 |
| 2013 | 13 |
| 2014 | 8 |
| 2015 | 10 |
| 2016 | 10 |
| 2017 | 15 |
| 2018 | 8 |
| 2019 | 11 |
| 2020 | 20 |
| 2021 | 7 |
| 2022 | 5 |
| 2023 | 12 |
| 2024 | 17 |
| 2025 | 17 |
| 2026 | 18 |
All-Time Record Progression
4 new records| Date | Kind | Detail |
|---|---|---|
| 1963-01-12 | Record low maximum temperature | Record low maximum temperature -15.0 C (5.0 F) |
| 1978-11-11 | Record daily precipitation | Record daily precipitation 81.5 mm (3.2 in) |
| 1993-02-19 | Record daily precipitation | Record daily precipitation 99.8 mm (3.9 in) |
| 2019-02-21 | Record daily snowfall | Record daily snowfall 91.2 cm (35.9 in) |
Wettest Day of Each Month
Feb: 99.8 mm (3.9 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 86.1 mm (3.4 in) | 21 January 2010 |
| Feb | 99.8 mm (3.9 in) | 19 February 1993 |
| Mar | 71.4 mm (2.8 in) | 1 March 1970 |
| Apr | 45.7 mm (1.8 in) | 16 April 1934 |
| May | 28.2 mm (1.1 in) | 24 May 1965 |
| Jun | 61.0 mm (2.4 in) | 29 June 1956 |
| Jul | 64.8 mm (2.6 in) | 15 July 1964 |
| Aug | 77.2 mm (3.0 in) | 13 August 1986 |
| Sep | 72.1 mm (2.8 in) | 5 September 1970 |
| Oct | 61.5 mm (2.4 in) | 24 October 1992 |
| Nov | 81.5 mm (3.2 in) | 11 November 1978 |
| Dec | 84.6 mm (3.3 in) | 29 December 2004 |
Period of Record Coverage
1893 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1893 | 61 | 17% | No |
| 1894 | 365 | 100% | Yes |
| 1895 | 333 | 91% | Yes |
| 1896 | 244 | 67% | No |
| 1897 | 332 | 91% | Yes |
| 1898 | 243 | 67% | No |
| 1905 | 99 | 27% | No |
| 1906 | 214 | 59% | No |
| 1907 | 31 | 8% | No |
| 1923 | 31 | 8% | No |
| 1924 | 335 | 92% | Yes |
| 1925 | 365 | 100% | Yes |
| 1926 | 365 | 100% | Yes |
| 1927 | 365 | 100% | Yes |
| 1928 | 366 | 100% | Yes |
| 1929 | 365 | 100% | Yes |
| 1930 | 365 | 100% | Yes |
| 1931 | 365 | 100% | Yes |
| 1932 | 366 | 100% | Yes |
| 1933 | 365 | 100% | Yes |
| 1934 | 365 | 100% | Yes |
| 1935 | 365 | 100% | Yes |
| 1936 | 366 | 100% | Yes |
| 1937 | 365 | 100% | Yes |
| 1938 | 365 | 100% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 335 | 92% | Yes |
| 1941 | 275 | 75% | No |
| 1942 | 331 | 91% | Yes |
| 1943 | 130 | 36% | No |
| 1950 | 354 | 97% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 365 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 365 | 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 | 366 | 100% | Yes |
| 1985 | 365 | 100% | Yes |
| 1986 | 365 | 100% | Yes |
| 1987 | 365 | 100% | Yes |
| 1988 | 366 | 100% | Yes |
| 1989 | 365 | 100% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 366 | 100% | Yes |
| 1993 | 365 | 100% | Yes |
| 1994 | 336 | 92% | Yes |
| 1995 | 361 | 99% | Yes |
| 1996 | 355 | 97% | Yes |
| 1997 | 365 | 100% | Yes |
| 1998 | 365 | 100% | Yes |
| 1999 | 365 | 100% | Yes |
| 2000 | 366 | 100% | Yes |
| 2001 | 365 | 100% | Yes |
| 2002 | 365 | 100% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 366 | 100% | Yes |
| 2005 | 365 | 100% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 365 | 100% | Yes |
| 2008 | 366 | 100% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 365 | 100% | Yes |
| 2011 | 361 | 99% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 365 | 100% | Yes |
| 2015 | 365 | 100% | Yes |
| 2016 | 366 | 100% | Yes |
| 2017 | 365 | 100% | Yes |
| 2018 | 365 | 100% | Yes |
| 2019 | 365 | 100% | Yes |
| 2020 | 366 | 100% | Yes |
| 2021 | 365 | 100% | Yes |
| 2022 | 365 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 364 | 100% | Yes |
| 2026 | 284 | 78% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 11 October 2026 | Flagstaff AP, US | daily rain (Provisional) | 50.3 mm (2.0 in) | 13.5 mm (0.5 in) | 97 years | 52 of 100 (Notable) |
| 28 September 2026 | Flagstaff AP, US | daily low max (Tie, Provisional) | 12.2 C (54.0 F) | tie | 56 years | 6 of 100 (Routine) |
| 15 September 2026 | Flagstaff AP, US | daily high min (Provisional) | 13.3 C (55.9 F) | 1.6 C (2.9 F) | 11 years | 17 of 100 (Routine) |
| 28 August 2026 | Flagstaff AP, US | daily high max (Tie, Provisional) | 30.6 C (87.1 F) | tie | 49 years | 6 of 100 (Routine) |
| 26 August 2026 | Flagstaff AP, US | daily high max (Provisional) | 32.2 C (90.0 F) | 0.5 C (0.9 F) | 127 years | 41 of 100 (Notable) |
| 4 August 2026 | Flagstaff AP, US | daily high min (Tie) | 15.6 C (60.1 F) | tie | 19 years | 3 of 100 (Routine) |
| 2 August 2026 | Flagstaff AP, US | daily high max (Tie) | 32.2 C (90.0 F) | tie | 88 years | 9 of 100 (Routine) |
| 17 July 2026 | Flagstaff AP, US | daily rain | 36.3 mm (1.4 in) | 12.7 mm (0.5 in) | 76 years | 48 of 100 (Notable) |
| 11 July 2026 | Flagstaff AP, US | daily high max (Tie) | 33.3 C (91.9 F) | tie | 68 years | 7 of 100 (Routine) |
| 16 June 2026 | Flagstaff AP, US | daily high min | 12.8 C (55.0 F) | 1.1 C (2.0 F) | 8 years | 14 of 100 (Routine) |
| 4 May 2026 | Flagstaff AP, US | daily high min (Tie) | 6.7 C (44.1 F) | tie | 100 years | 10 of 100 (Routine) |
| 6 April 2026 | Flagstaff AP, US | daily high min (Tie) | 3.9 C (39.0 F) | tie | 101 years | 10 of 100 (Routine) |
| 31 March 2026 | Flagstaff AP, US | daily high min | 6.1 C (43.0 F) | 3.3 C (5.9 F) | 28 years | 26 of 100 (Routine) |
| 30 March 2026 | Flagstaff AP, US | daily high min | 3.3 C (37.9 F) | 0.5 C (0.9 F) | 1 year | 11 of 100 (Routine) |
| 29 March 2026 | Flagstaff AP, US | daily high min (Tie) | 3.3 C (37.9 F) | tie | 131 years | 10 of 100 (Routine) |
| 28 March 2026 | Flagstaff AP, US | daily high max (Tie) | 21.1 C (70.0 F) | tie | 11 years | 3 of 100 (Routine) |
| 27 March 2026 | Flagstaff AP, US | daily high max | 25.0 C (77.0 F) | 2.8 C (5.0 F) | 11 years | 18 of 100 (Routine) |
| 26 March 2026 | Flagstaff AP, US | daily high max | 23.3 C (73.9 F) | 0.5 C (0.9 F) | 37 years | 21 of 100 (Routine) |
| 25 March 2026 | Flagstaff AP, US | daily high max | 25.0 C (77.0 F) | 2.8 C (5.0 F) | 37 years | 26 of 100 (Routine) |
| 24 March 2026 | Flagstaff AP, US | daily high max | 24.4 C (75.9 F) | 2.7 C (4.9 F) | 0 years | 15 of 100 (Routine) |
Climate Trend
92 complete years, 1894 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1894 | 8.4 C | +0.43 C |
| 1925 | 7.7 C | -0.23 C |
| 1926 | 8.0 C | +0.02 C |
| 1927 | 8.0 C | +0.04 C |
| 1928 | 7.8 C | -0.18 C |
| 1929 | 7.6 C | -0.37 C |
| 1930 | 7.2 C | -0.74 C |
| 1931 | 7.8 C | -0.13 C |
| 1932 | 7.0 C | -0.92 C |
| 1933 | 7.5 C | -0.47 C |
| 1934 | 9.3 C | +1.37 C |
| 1935 | 7.6 C | -0.34 C |
| 1936 | 8.4 C | +0.49 C |
| 1937 | 7.7 C | -0.30 C |
| 1938 | 8.0 C | +0.02 C |
| 1939 | 8.1 C | +0.15 C |
| 1942 | 8.5 C | +0.55 C |
| 1950 | 8.3 C | +0.39 C |
| 1951 | 7.2 C | -0.76 C |
| 1952 | 6.8 C | -1.20 C |
| 1953 | 7.5 C | -0.48 C |
| 1954 | 8.0 C | +0.03 C |
| 1955 | 6.6 C | -1.35 C |
| 1956 | 7.5 C | -0.46 C |
| 1957 | 7.6 C | -0.31 C |
| 1958 | 8.2 C | +0.20 C |
| 1959 | 8.0 C | +0.03 C |
| 1960 | 7.6 C | -0.40 C |
| 1961 | 7.4 C | -0.55 C |
| 1962 | 7.5 C | -0.44 C |
| 1963 | 7.9 C | -0.08 C |
| 1964 | 6.7 C | -1.27 C |
| 1965 | 7.0 C | -0.97 C |
| 1966 | 7.7 C | -0.29 C |
| 1967 | 7.6 C | -0.36 C |
| 1968 | 7.1 C | -0.90 C |
| 1969 | 6.9 C | -1.04 C |
| 1970 | 7.8 C | -0.16 C |
| 1971 | 6.5 C | -1.48 C |
| 1972 | 6.6 C | -1.32 C |
| 1973 | 7.1 C | -0.85 C |
| 1974 | 8.3 C | +0.39 C |
| 1975 | 6.7 C | -1.22 C |
| 1976 | 8.1 C | +0.12 C |
| 1977 | 8.7 C | +0.73 C |
| 1978 | 7.8 C | -0.20 C |
| 1979 | 6.3 C | -1.63 C |
| 1980 | 8.6 C | +0.62 C |
| 1981 | 9.7 C | +1.72 C |
| 1982 | 7.2 C | -0.79 C |
| 1983 | 7.8 C | -0.13 C |
| 1984 | 7.9 C | -0.08 C |
| 1985 | 7.8 C | -0.20 C |
| 1986 | 8.2 C | +0.29 C |
| 1987 | 7.5 C | -0.50 C |
| 1988 | 8.2 C | +0.28 C |
| 1989 | 8.8 C | +0.81 C |
| 1990 | 8.0 C | +0.09 C |
| 1991 | 8.2 C | +0.23 C |
| 1992 | 8.2 C | +0.24 C |
| 1993 | 8.4 C | +0.48 C |
| 1995 | 8.0 C | +0.09 C |
| 1996 | 8.6 C | +0.67 C |
| 1997 | 7.4 C | -0.52 C |
| 1998 | 6.9 C | -1.10 C |
| 1999 | 7.8 C | -0.15 C |
| 2000 | 8.7 C | +0.71 C |
| 2001 | 8.3 C | +0.30 C |
| 2002 | 8.6 C | +0.64 C |
| 2003 | 8.8 C | +0.82 C |
| 2004 | 7.6 C | -0.38 C |
| 2005 | 8.1 C | +0.19 C |
| 2006 | 8.1 C | +0.13 C |
| 2007 | 8.5 C | +0.53 C |
| 2008 | 8.2 C | +0.24 C |
| 2009 | 8.1 C | +0.17 C |
| 2010 | 7.9 C | -0.09 C |
| 2011 | 7.6 C | -0.31 C |
| 2012 | 8.8 C | +0.89 C |
| 2013 | 7.7 C | -0.30 C |
| 2014 | 9.2 C | +1.28 C |
| 2015 | 8.7 C | +0.74 C |
| 2016 | 8.6 C | +0.62 C |
| 2017 | 9.3 C | +1.33 C |
| 2018 | 8.8 C | +0.83 C |
| 2019 | 7.7 C | -0.24 C |
| 2020 | 9.1 C | +1.10 C |
| 2021 | 8.7 C | +0.76 C |
| 2022 | 8.6 C | +0.64 C |
| 2023 | 8.2 C | +0.27 C |
| 2024 | 9.5 C | +1.55 C |
| 2025 | 9.5 C | +1.59 C |
The annual mean temperature here has risen by 0.09 C (0.05 to 0.14) per decade over 1894 to 2025. In Fahrenheit: 0.2 F (0.1 to 0.2) per decade. The slope is a straight line fitted to 92 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.09 C (0.05 to 0.14) per decade | 0.2 F (0.1 to 0.2) per decade | 1894 to 2025 | 92 | Rise |
| Mean daily maximum | 0.08 C (0.03 to 0.13) per decade | 0.14 F (0.05 to 0.23) per decade | 1894 to 2025 | 92 | Rise |
| Mean daily minimum | 0.1 C (0.1 to 0.2) per decade | 0.2 F (0.1 to 0.3) per decade | 1894 to 2025 | 92 | 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
1893 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 37.2 C (99.0 F) | 1898 | 32.8 C (91.0 F) | 107 |
| Coldest night (TNn) | -34.4 C (-29.9 F) | 1937 | -22.2 C (-8.0 F) | 106 |
| Wettest day (Rx1day) | 99.8 mm (3.9 in) | 1993 | 43.2 mm (1.7 in) | 107 |
| Wettest five days (Rx5day) | 233.8 mm (9.2 in) | 1895 | 71.7 mm (2.8 in) | 107 |
| Longest dry spell (CDD) | 113 days | 1897 | 42 days | 107 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1893 | 21.1 C (70.0 F) |
| 1894 | 36.7 C (98.1 F) |
| 1895 | 31.7 C (89.1 F) |
| 1896 | 33.9 C (93.0 F) |
| 1897 | 31.1 C (88.0 F) |
| 1898 | 37.2 C (99.0 F) |
| 1905 | 23.3 C (73.9 F) |
| 1906 | 27.8 C (82.0 F) |
| 1907 | 11.7 C (53.1 F) |
| 1923 | 15.0 C (59.0 F) |
| 1924 | 32.8 C (91.0 F) |
| 1925 | 33.3 C (91.9 F) |
| 1926 | 33.3 C (91.9 F) |
| 1927 | 31.7 C (89.1 F) |
| 1928 | 31.7 C (89.1 F) |
| 1929 | 33.3 C (91.9 F) |
| 1930 | 32.2 C (90.0 F) |
| 1931 | 33.3 C (91.9 F) |
| 1932 | 31.7 C (89.1 F) |
| 1933 | 31.7 C (89.1 F) |
| 1934 | 33.3 C (91.9 F) |
| 1935 | 33.3 C (91.9 F) |
| 1936 | 33.9 C (93.0 F) |
| 1937 | 33.3 C (91.9 F) |
| 1938 | 33.3 C (91.9 F) |
| 1939 | 33.9 C (93.0 F) |
| 1940 | 35.0 C (95.0 F) |
| 1941 | 30.6 C (87.1 F) |
| 1942 | 33.3 C (91.9 F) |
| 1943 | 27.2 C (81.0 F) |
| 1950 | 33.3 C (91.9 F) |
| 1951 | 32.2 C (90.0 F) |
| 1952 | 30.0 C (86.0 F) |
| 1953 | 32.2 C (90.0 F) |
| 1954 | 34.4 C (93.9 F) |
| 1955 | 31.1 C (88.0 F) |
| 1956 | 32.8 C (91.0 F) |
| 1957 | 31.7 C (89.1 F) |
| 1958 | 33.3 C (91.9 F) |
| 1959 | 31.7 C (89.1 F) |
| 1960 | 33.3 C (91.9 F) |
| 1961 | 33.3 C (91.9 F) |
| 1962 | 31.7 C (89.1 F) |
| 1963 | 31.7 C (89.1 F) |
| 1964 | 32.2 C (90.0 F) |
| 1965 | 30.6 C (87.1 F) |
| 1966 | 31.1 C (88.0 F) |
| 1967 | 32.2 C (90.0 F) |
| 1968 | 32.2 C (90.0 F) |
| 1969 | 33.3 C (91.9 F) |
| 1970 | 35.6 C (96.1 F) |
| 1971 | 33.3 C (91.9 F) |
| 1972 | 34.4 C (93.9 F) |
| 1973 | 36.1 C (97.0 F) |
| 1974 | 34.4 C (93.9 F) |
| 1975 | 32.2 C (90.0 F) |
| 1976 | 32.8 C (91.0 F) |
| 1977 | 33.3 C (91.9 F) |
| 1978 | 33.3 C (91.9 F) |
| 1979 | 32.2 C (90.0 F) |
| 1980 | 33.3 C (91.9 F) |
| 1981 | 33.3 C (91.9 F) |
| 1982 | 31.1 C (88.0 F) |
| 1983 | 32.8 C (91.0 F) |
| 1984 | 32.8 C (91.0 F) |
| 1985 | 34.4 C (93.9 F) |
| 1986 | 31.7 C (89.1 F) |
| 1987 | 31.7 C (89.1 F) |
| 1988 | 31.1 C (88.0 F) |
| 1989 | 35.6 C (96.1 F) |
| 1990 | 34.4 C (93.9 F) |
| 1991 | 32.8 C (91.0 F) |
| 1992 | 32.2 C (90.0 F) |
| 1993 | 32.8 C (91.0 F) |
| 1994 | 32.8 C (91.0 F) |
| 1995 | 34.4 C (93.9 F) |
| 1996 | 33.3 C (91.9 F) |
| 1997 | 32.8 C (91.0 F) |
| 1998 | 32.8 C (91.0 F) |
| 1999 | 31.7 C (89.1 F) |
| 2000 | 32.8 C (91.0 F) |
| 2001 | 32.2 C (90.0 F) |
| 2002 | 34.4 C (93.9 F) |
| 2003 | 34.4 C (93.9 F) |
| 2004 | 30.6 C (87.1 F) |
| 2005 | 33.9 C (93.0 F) |
| 2006 | 32.8 C (91.0 F) |
| 2007 | 35.6 C (96.1 F) |
| 2008 | 31.7 C (89.1 F) |
| 2009 | 33.9 C (93.0 F) |
| 2010 | 32.2 C (90.0 F) |
| 2011 | 31.7 C (89.1 F) |
| 2012 | 31.7 C (89.1 F) |
| 2013 | 35.6 C (96.1 F) |
| 2014 | 31.1 C (88.0 F) |
| 2015 | 33.3 C (91.9 F) |
| 2016 | 35.0 C (95.0 F) |
| 2017 | 33.9 C (93.0 F) |
| 2018 | 32.8 C (91.0 F) |
| 2019 | 31.7 C (89.1 F) |
| 2020 | 33.9 C (93.0 F) |
| 2021 | 35.6 C (96.1 F) |
| 2022 | 31.7 C (89.1 F) |
| 2023 | 35.6 C (96.1 F) |
| 2024 | 34.4 C (93.9 F) |
| 2025 | 33.3 C (91.9 F) |
| 2026 | 33.3 C (91.9 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1893 | -19.4 C (-2.9 F) |
| 1894 | -28.3 C (-18.9 F) |
| 1895 | -25.0 C (-13.0 F) |
| 1896 | -17.8 C (0.0 F) |
| 1897 | -23.3 C (-9.9 F) |
| 1898 | -30.0 C (-22.0 F) |
| 1905 | n/a |
| 1906 | -17.8 C (0.0 F) |
| 1907 | -17.8 C (0.0 F) |
| 1923 | -15.6 C (3.9 F) |
| 1924 | -26.7 C (-16.1 F) |
| 1925 | -23.3 C (-9.9 F) |
| 1926 | -25.6 C (-14.1 F) |
| 1927 | -21.7 C (-7.1 F) |
| 1928 | -25.6 C (-14.1 F) |
| 1929 | -29.4 C (-20.9 F) |
| 1930 | -22.2 C (-8.0 F) |
| 1931 | -28.3 C (-18.9 F) |
| 1932 | -24.4 C (-11.9 F) |
| 1933 | -27.2 C (-17.0 F) |
| 1934 | -14.4 C (6.1 F) |
| 1935 | -23.3 C (-9.9 F) |
| 1936 | -18.9 C (-2.0 F) |
| 1937 | -34.4 C (-29.9 F) |
| 1938 | -21.1 C (-6.0 F) |
| 1939 | -25.0 C (-13.0 F) |
| 1940 | -18.3 C (-0.9 F) |
| 1941 | -18.3 C (-0.9 F) |
| 1942 | -24.4 C (-11.9 F) |
| 1943 | -25.0 C (-13.0 F) |
| 1950 | -18.3 C (-0.9 F) |
| 1951 | -22.2 C (-8.0 F) |
| 1952 | -23.9 C (-11.0 F) |
| 1953 | -20.6 C (-5.1 F) |
| 1954 | -20.6 C (-5.1 F) |
| 1955 | -26.7 C (-16.1 F) |
| 1956 | -22.2 C (-8.0 F) |
| 1957 | -22.8 C (-9.0 F) |
| 1958 | -25.0 C (-13.0 F) |
| 1959 | -21.7 C (-7.1 F) |
| 1960 | -24.4 C (-11.9 F) |
| 1961 | -26.7 C (-16.1 F) |
| 1962 | -26.7 C (-16.1 F) |
| 1963 | -28.9 C (-20.0 F) |
| 1964 | -26.1 C (-15.0 F) |
| 1965 | -26.7 C (-16.1 F) |
| 1966 | -26.7 C (-16.1 F) |
| 1967 | -21.1 C (-6.0 F) |
| 1968 | -26.7 C (-16.1 F) |
| 1969 | -23.3 C (-9.9 F) |
| 1970 | -20.6 C (-5.1 F) |
| 1971 | -30.0 C (-22.0 F) |
| 1972 | -25.6 C (-14.1 F) |
| 1973 | -24.4 C (-11.9 F) |
| 1974 | -27.2 C (-17.0 F) |
| 1975 | -21.7 C (-7.1 F) |
| 1976 | -24.4 C (-11.9 F) |
| 1977 | -22.2 C (-8.0 F) |
| 1978 | -30.6 C (-23.1 F) |
| 1979 | -28.3 C (-18.9 F) |
| 1980 | -17.8 C (0.0 F) |
| 1981 | -13.9 C (7.0 F) |
| 1982 | -23.9 C (-11.0 F) |
| 1983 | -21.1 C (-6.0 F) |
| 1984 | -20.6 C (-5.1 F) |
| 1985 | -30.6 C (-23.1 F) |
| 1986 | -22.8 C (-9.0 F) |
| 1987 | -25.0 C (-13.0 F) |
| 1988 | -25.0 C (-13.0 F) |
| 1989 | -24.4 C (-11.9 F) |
| 1990 | -30.6 C (-23.1 F) |
| 1991 | -20.6 C (-5.1 F) |
| 1992 | -21.1 C (-6.0 F) |
| 1993 | -19.4 C (-2.9 F) |
| 1994 | -20.0 C (-4.0 F) |
| 1995 | -22.2 C (-8.0 F) |
| 1996 | -19.4 C (-2.9 F) |
| 1997 | -23.3 C (-9.9 F) |
| 1998 | -22.8 C (-9.0 F) |
| 1999 | -16.1 C (3.0 F) |
| 2000 | -19.4 C (-2.9 F) |
| 2001 | -22.2 C (-8.0 F) |
| 2002 | -20.6 C (-5.1 F) |
| 2003 | -17.2 C (1.0 F) |
| 2004 | -20.0 C (-4.0 F) |
| 2005 | -20.0 C (-4.0 F) |
| 2006 | -18.3 C (-0.9 F) |
| 2007 | -26.1 C (-15.0 F) |
| 2008 | -22.2 C (-8.0 F) |
| 2009 | -21.1 C (-6.0 F) |
| 2010 | -25.0 C (-13.0 F) |
| 2011 | -28.3 C (-18.9 F) |
| 2012 | -20.0 C (-4.0 F) |
| 2013 | -23.2 C (-9.8 F) |
| 2014 | -14.9 C (5.2 F) |
| 2015 | -21.0 C (-5.8 F) |
| 2016 | -22.7 C (-8.9 F) |
| 2017 | -19.9 C (-3.8 F) |
| 2018 | -19.3 C (-2.7 F) |
| 2019 | -21.6 C (-6.9 F) |
| 2020 | -16.6 C (2.1 F) |
| 2021 | -16.6 C (2.1 F) |
| 2022 | -21.6 C (-6.9 F) |
| 2023 | -22.7 C (-8.9 F) |
| 2024 | -18.8 C (-1.8 F) |
| 2025 | -16.6 C (2.1 F) |
| 2026 | -16.1 C (3.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1893 | 66.0 mm (2.6 in) |
| 1894 | 61.0 mm (2.4 in) |
| 1895 | 71.1 mm (2.8 in) |
| 1896 | 45.7 mm (1.8 in) |
| 1897 | 15.2 mm (0.6 in) |
| 1898 | 30.5 mm (1.2 in) |
| 1905 | 49.3 mm (1.9 in) |
| 1906 | 38.6 mm (1.5 in) |
| 1907 | 20.8 mm (0.8 in) |
| 1923 | 36.3 mm (1.4 in) |
| 1924 | 39.4 mm (1.6 in) |
| 1925 | 44.5 mm (1.8 in) |
| 1926 | 24.9 mm (1.0 in) |
| 1927 | 45.7 mm (1.8 in) |
| 1928 | 36.8 mm (1.4 in) |
| 1929 | 55.6 mm (2.2 in) |
| 1930 | 36.1 mm (1.4 in) |
| 1931 | 27.9 mm (1.1 in) |
| 1932 | 47.8 mm (1.9 in) |
| 1933 | 22.9 mm (0.9 in) |
| 1934 | 45.7 mm (1.8 in) |
| 1935 | 42.4 mm (1.7 in) |
| 1936 | 26.4 mm (1.0 in) |
| 1937 | 29.0 mm (1.1 in) |
| 1938 | 53.6 mm (2.1 in) |
| 1939 | 23.9 mm (0.9 in) |
| 1940 | 45.7 mm (1.8 in) |
| 1941 | 69.9 mm (2.8 in) |
| 1942 | 17.0 mm (0.7 in) |
| 1943 | 31.2 mm (1.2 in) |
| 1950 | 23.6 mm (0.9 in) |
| 1951 | 74.9 mm (2.9 in) |
| 1952 | 43.9 mm (1.7 in) |
| 1953 | 33.0 mm (1.3 in) |
| 1954 | 32.5 mm (1.3 in) |
| 1955 | 40.1 mm (1.6 in) |
| 1956 | 61.0 mm (2.4 in) |
| 1957 | 38.1 mm (1.5 in) |
| 1958 | 45.5 mm (1.8 in) |
| 1959 | 47.0 mm (1.9 in) |
| 1960 | 40.9 mm (1.6 in) |
| 1961 | 34.5 mm (1.4 in) |
| 1962 | 38.4 mm (1.5 in) |
| 1963 | 45.5 mm (1.8 in) |
| 1964 | 64.8 mm (2.6 in) |
| 1965 | 53.6 mm (2.1 in) |
| 1966 | 72.9 mm (2.9 in) |
| 1967 | 58.9 mm (2.3 in) |
| 1968 | 34.0 mm (1.3 in) |
| 1969 | 40.9 mm (1.6 in) |
| 1970 | 72.1 mm (2.8 in) |
| 1971 | 46.5 mm (1.8 in) |
| 1972 | 43.2 mm (1.7 in) |
| 1973 | 22.9 mm (0.9 in) |
| 1974 | 29.2 mm (1.1 in) |
| 1975 | 47.2 mm (1.9 in) |
| 1976 | 58.2 mm (2.3 in) |
| 1977 | 35.6 mm (1.4 in) |
| 1978 | 81.5 mm (3.2 in) |
| 1979 | 46.5 mm (1.8 in) |
| 1980 | 60.2 mm (2.4 in) |
| 1981 | 33.8 mm (1.3 in) |
| 1982 | 54.1 mm (2.1 in) |
| 1983 | 68.8 mm (2.7 in) |
| 1984 | 34.8 mm (1.4 in) |
| 1985 | 50.8 mm (2.0 in) |
| 1986 | 77.2 mm (3.0 in) |
| 1987 | 50.5 mm (2.0 in) |
| 1988 | 41.1 mm (1.6 in) |
| 1989 | 32.3 mm (1.3 in) |
| 1990 | 41.4 mm (1.6 in) |
| 1991 | 52.1 mm (2.1 in) |
| 1992 | 69.9 mm (2.8 in) |
| 1993 | 99.8 mm (3.9 in) |
| 1994 | 40.1 mm (1.6 in) |
| 1995 | 51.3 mm (2.0 in) |
| 1996 | 22.6 mm (0.9 in) |
| 1997 | 34.3 mm (1.4 in) |
| 1998 | 37.6 mm (1.5 in) |
| 1999 | 38.1 mm (1.5 in) |
| 2000 | 21.6 mm (0.9 in) |
| 2001 | 27.9 mm (1.1 in) |
| 2002 | 28.4 mm (1.1 in) |
| 2003 | 50.8 mm (2.0 in) |
| 2004 | 84.6 mm (3.3 in) |
| 2005 | 39.9 mm (1.6 in) |
| 2006 | 29.0 mm (1.1 in) |
| 2007 | 40.1 mm (1.6 in) |
| 2008 | 32.5 mm (1.3 in) |
| 2009 | 44.5 mm (1.8 in) |
| 2010 | 86.1 mm (3.4 in) |
| 2011 | 59.2 mm (2.3 in) |
| 2012 | 35.3 mm (1.4 in) |
| 2013 | 44.7 mm (1.8 in) |
| 2014 | 48.0 mm (1.9 in) |
| 2015 | 50.3 mm (2.0 in) |
| 2016 | 37.6 mm (1.5 in) |
| 2017 | 45.5 mm (1.8 in) |
| 2018 | 58.4 mm (2.3 in) |
| 2019 | 50.8 mm (2.0 in) |
| 2020 | 25.4 mm (1.0 in) |
| 2021 | 45.7 mm (1.8 in) |
| 2022 | 39.6 mm (1.6 in) |
| 2023 | 60.5 mm (2.4 in) |
| 2024 | 36.8 mm (1.4 in) |
| 2025 | 33.5 mm (1.3 in) |
| 2026 | 50.3 mm (2.0 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1893 | 104.1 mm (4.1 in) |
| 1894 | 61.0 mm (2.4 in) |
| 1895 | 233.8 mm (9.2 in) |
| 1896 | 58.4 mm (2.3 in) |
| 1897 | 22.8 mm (0.9 in) |
| 1898 | 78.7 mm (3.1 in) |
| 1905 | 84.3 mm (3.3 in) |
| 1906 | 67.0 mm (2.6 in) |
| 1907 | 43.5 mm (1.7 in) |
| 1923 | 74.6 mm (2.9 in) |
| 1924 | 59.5 mm (2.3 in) |
| 1925 | 103.9 mm (4.1 in) |
| 1926 | 39.8 mm (1.6 in) |
| 1927 | 99.6 mm (3.9 in) |
| 1928 | 47.2 mm (1.9 in) |
| 1929 | 74.5 mm (2.9 in) |
| 1930 | 67.3 mm (2.6 in) |
| 1931 | 45.0 mm (1.8 in) |
| 1932 | 65.5 mm (2.6 in) |
| 1933 | 39.1 mm (1.5 in) |
| 1934 | 60.4 mm (2.4 in) |
| 1935 | 55.9 mm (2.2 in) |
| 1936 | 58.5 mm (2.3 in) |
| 1937 | 60.2 mm (2.4 in) |
| 1938 | 87.4 mm (3.4 in) |
| 1939 | 41.1 mm (1.6 in) |
| 1940 | 52.4 mm (2.1 in) |
| 1941 | 86.5 mm (3.4 in) |
| 1942 | 25.4 mm (1.0 in) |
| 1943 | 22.6 mm (0.9 in) |
| 1950 | 39.6 mm (1.6 in) |
| 1951 | 101.5 mm (4.0 in) |
| 1952 | 102.3 mm (4.0 in) |
| 1953 | 45.5 mm (1.8 in) |
| 1954 | 83.9 mm (3.3 in) |
| 1955 | 74.1 mm (2.9 in) |
| 1956 | 70.9 mm (2.8 in) |
| 1957 | 116.1 mm (4.6 in) |
| 1958 | 77.2 mm (3.0 in) |
| 1959 | 64.3 mm (2.5 in) |
| 1960 | 61.2 mm (2.4 in) |
| 1961 | 41.4 mm (1.6 in) |
| 1962 | 48.2 mm (1.9 in) |
| 1963 | 53.6 mm (2.1 in) |
| 1964 | 64.8 mm (2.6 in) |
| 1965 | 114.1 mm (4.5 in) |
| 1966 | 139.7 mm (5.5 in) |
| 1967 | 104.9 mm (4.1 in) |
| 1968 | 43.1 mm (1.7 in) |
| 1969 | 77.2 mm (3.0 in) |
| 1970 | 98.3 mm (3.9 in) |
| 1971 | 68.9 mm (2.7 in) |
| 1972 | 119.7 mm (4.7 in) |
| 1973 | 49.8 mm (2.0 in) |
| 1974 | 70.6 mm (2.8 in) |
| 1975 | 75.1 mm (3.0 in) |
| 1976 | 126.8 mm (5.0 in) |
| 1977 | 54.7 mm (2.2 in) |
| 1978 | 125.5 mm (4.9 in) |
| 1979 | 90.5 mm (3.6 in) |
| 1980 | 110.7 mm (4.4 in) |
| 1981 | 59.7 mm (2.4 in) |
| 1982 | 86.1 mm (3.4 in) |
| 1983 | 82.8 mm (3.3 in) |
| 1984 | 50.5 mm (2.0 in) |
| 1985 | 96.8 mm (3.8 in) |
| 1986 | 115.1 mm (4.5 in) |
| 1987 | 118.2 mm (4.7 in) |
| 1988 | 68.1 mm (2.7 in) |
| 1989 | 67.4 mm (2.7 in) |
| 1990 | 81.8 mm (3.2 in) |
| 1991 | 105.4 mm (4.1 in) |
| 1992 | 95.3 mm (3.8 in) |
| 1993 | 143.0 mm (5.6 in) |
| 1994 | 43.9 mm (1.7 in) |
| 1995 | 78.2 mm (3.1 in) |
| 1996 | 50.8 mm (2.0 in) |
| 1997 | 43.9 mm (1.7 in) |
| 1998 | 64.6 mm (2.5 in) |
| 1999 | 71.7 mm (2.8 in) |
| 2000 | 42.5 mm (1.7 in) |
| 2001 | 54.6 mm (2.1 in) |
| 2002 | 81.2 mm (3.2 in) |
| 2003 | 62.5 mm (2.5 in) |
| 2004 | 98.6 mm (3.9 in) |
| 2005 | 98.6 mm (3.9 in) |
| 2006 | 63.1 mm (2.5 in) |
| 2007 | 74.4 mm (2.9 in) |
| 2008 | 55.6 mm (2.2 in) |
| 2009 | 51.1 mm (2.0 in) |
| 2010 | 133.9 mm (5.3 in) |
| 2011 | 68.1 mm (2.7 in) |
| 2012 | 56.2 mm (2.2 in) |
| 2013 | 74.5 mm (2.9 in) |
| 2014 | 67.1 mm (2.6 in) |
| 2015 | 105.9 mm (4.2 in) |
| 2016 | 75.4 mm (3.0 in) |
| 2017 | 72.7 mm (2.9 in) |
| 2018 | 72.9 mm (2.9 in) |
| 2019 | 75.1 mm (3.0 in) |
| 2020 | 60.7 mm (2.4 in) |
| 2021 | 90.4 mm (3.6 in) |
| 2022 | 68.1 mm (2.7 in) |
| 2023 | 88.5 mm (3.5 in) |
| 2024 | 74.9 mm (2.9 in) |
| 2025 | 96.5 mm (3.8 in) |
| 2026 | 74.9 mm (2.9 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1893 | 49 days |
| 1894 | 33 days |
| 1895 | 33 days |
| 1896 | 73 days |
| 1897 | 113 days |
| 1898 | 19 days |
| 1905 | 59 days |
| 1906 | 32 days |
| 1907 | 9 days |
| 1923 | 7 days |
| 1924 | 68 days |
| 1925 | 36 days |
| 1926 | 34 days |
| 1927 | 33 days |
| 1928 | 32 days |
| 1929 | 56 days |
| 1930 | 38 days |
| 1931 | 32 days |
| 1932 | 40 days |
| 1933 | 33 days |
| 1934 | 28 days |
| 1935 | 32 days |
| 1936 | 51 days |
| 1937 | 54 days |
| 1938 | 37 days |
| 1939 | 49 days |
| 1940 | 33 days |
| 1941 | 25 days |
| 1942 | 63 days |
| 1943 | 26 days |
| 1950 | 55 days |
| 1951 | 56 days |
| 1952 | 41 days |
| 1953 | 49 days |
| 1954 | 44 days |
| 1955 | 40 days |
| 1956 | 40 days |
| 1957 | 37 days |
| 1958 | 45 days |
| 1959 | 36 days |
| 1960 | 41 days |
| 1961 | 33 days |
| 1962 | 32 days |
| 1963 | 71 days |
| 1964 | 45 days |
| 1965 | 29 days |
| 1966 | 70 days |
| 1967 | 48 days |
| 1968 | 34 days |
| 1969 | 65 days |
| 1970 | 54 days |
| 1971 | 45 days |
| 1972 | 101 days |
| 1973 | 79 days |
| 1974 | 95 days |
| 1975 | 36 days |
| 1976 | 51 days |
| 1977 | 28 days |
| 1978 | 39 days |
| 1979 | 38 days |
| 1980 | 42 days |
| 1981 | 31 days |
| 1982 | 51 days |
| 1983 | 38 days |
| 1984 | 33 days |
| 1985 | 30 days |
| 1986 | 24 days |
| 1987 | 33 days |
| 1988 | 46 days |
| 1989 | 63 days |
| 1990 | 27 days |
| 1991 | 63 days |
| 1992 | 53 days |
| 1993 | 57 days |
| 1994 | 24 days |
| 1995 | 33 days |
| 1996 | 82 days |
| 1997 | 46 days |
| 1998 | 46 days |
| 1999 | 99 days |
| 2000 | 35 days |
| 2001 | 42 days |
| 2002 | 73 days |
| 2003 | 40 days |
| 2004 | 74 days |
| 2005 | 50 days |
| 2006 | 34 days |
| 2007 | 44 days |
| 2008 | 71 days |
| 2009 | 36 days |
| 2010 | 43 days |
| 2011 | 43 days |
| 2012 | 78 days |
| 2013 | 55 days |
| 2014 | 34 days |
| 2015 | 42 days |
| 2016 | 33 days |
| 2017 | 95 days |
| 2018 | 44 days |
| 2019 | 45 days |
| 2020 | 64 days |
| 2021 | 38 days |
| 2022 | 80 days |
| 2023 | 46 days |
| 2024 | 58 days |
| 2025 | 28 days |
| 2026 | 39 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
92 years with a frostAcross 92 years with a frost, the median last spring frost at Flagstaff AP falls on 10 June and the median first autumn frost on 25 September, which leaves a median of 109 days between them.
In 1996 to 2025 the median growing season was 114 days. That is 3 days more than in 1894 to 1962.
Fitted over all years, the growing season changes by +1.0 days per decade at this station.
| Measure | Median, all years | Earliest period (1894 to 1962) | Recent period (1996 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 10 June | 10 June | 1 June | 9 days earlier | -0.8 days per decade |
| First autumn frost | 25 September | 25 September | 28 September | 3 days later | +0.3 days per decade |
| Growing days | 109 days | 111 days | 114 days | 3 days more | +1.0 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
92 years, 1924 to 2025A day with at least 42.3 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 95.9 mm (3.8 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 42.3 mm (1.7 in) | |
| 5 years | 56.4 mm (2.2 in) | |
| 10 years | 65.9 mm (2.6 in) | |
| 25 years | 77.9 mm (3.1 in) | |
| 50 years | 86.9 mm (3.4 in) | |
| 100 years | 95.9 mm (3.8 in) | Longer than the 92 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, 92 years of values from 1924 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: 99.8 mm (3.9 in) in 1993; 86.1 mm (3.4 in) in 2010; 84.6 mm (3.3 in) in 2004.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Climate Twins
2011 to 2025 against 1961 to 1990Over 2011 to 2025, Flagstaff AP had a mean temperature of 8.7 C (47.6 F) and 538.3 mm (21.2 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Heber (Black Mesa) Rs (United States, 131 km away), Beaverhead R/S (United States, 379 km away) and Ft Bidwell (United States, 1,050 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Heber (Black Mesa) Rs | United States | 131 km (81 mi) | 9.1 C (48.3 F) | 475.0 mm (18.7 in) | 0.63 |
| Beaverhead R/S | United States | 379 km (235 mi) | 8.8 C (47.8 F) | 414.4 mm (16.3 in) | 0.70 |
| Ft Bidwell | United States | 1,050 km (652 mi) | 8.9 C (47.9 F) | 436.5 mm (17.2 in) | 0.85 |
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 (2026-10-14).