Frost history / Roosevelt 1 S, AZ
Roosevelt 1 S, AZ: frost dates by year
Last spring and first fall frost at NOAA station USC00027281, 1951 to 2023, measured from daily minimum temperatures.
Elevation 2,605 ft, 33.649, -111.109. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Feb 8 | Dec 12 |
| Earliest | Jan 1 (1959) | Nov 1 (1976) |
| Latest | Apr 6 (2023) | Dec 31 (2010) |
| Trend | 2.3 days later per decade | 0.7 days later per decade |
| Years with data | 64, 13 with no freeze | 62, 16 with no freeze |
At 28°F (hard freeze) the median last spring date is Feb 1 and the median first fall date is Dec 22.
The trend is a straight-line fit through the years with a freeze. A positive spring trend means the last frost now comes later. Short or patchy records give noisy trends.
Chart
Last spring frost (32°F)
First fall frost (32°F)
Dots are single years. The gray line is the median, the green line the fitted trend.
Year by year
| Year | Last spring 32°F | First fall 32°F | Last spring 28°F | First fall 28°F |
|---|---|---|---|---|
| 2023 | Apr 6 | no data | Mar 4 | no data |
| 2022 | Mar 12 | Nov 4 | Mar 8 | Nov 15 |
| 2021 | Mar 28 | Dec 11 | Jan 27 | Dec 16 |
| 2020 | no data | Nov 30 | no data | Dec 16 |
| 2016 | Feb 5 | none | none | none |
| 2015 | Jan 3 | no data | none | no data |
| 2014 | Feb 10 | Dec 27 | none | none |
| 2013 | no data | Dec 7 | no data | none |
| 2012 | none | no data | none | no data |
| 2011 | Feb 5 | none | Feb 5 | none |
| 2010 | Feb 23 | Dec 31 | none | none |
| 2009 | Feb 10 | Dec 5 | none | Dec 26 |
| 2008 | Mar 19 | Dec 29 | none | Dec 29 |
| 2007 | Jan 23 | Dec 15 | Jan 17 | none |
| 2006 | Mar 13 | Nov 30 | Jan 25 | none |
| 2005 | none | none | none | none |
| 2004 | Jan 6 | Nov 30 | none | none |
| 2003 | none | Nov 24 | none | Dec 29 |
| 2002 | Mar 4 | Dec 20 | Feb 1 | none |
| 2001 | Jan 20 | Dec 13 | none | none |
| 2000 | Jan 11 | Dec 19 | none | none |
| 1999 | Apr 2 | Dec 15 | none | none |
| 1998 | none | Dec 7 | none | none |
| 1997 | Jan 11 | Dec 15 | none | none |
| 1996 | no data | Dec 18 | no data | Dec 19 |
| 1995 | no data | none | no data | none |
| 1994 | Feb 4 | Nov 19 | none | none |
| 1992 | none | no data | none | no data |
| 1991 | Jan 31 | Dec 2 | Jan 30 | none |
| 1990 | Feb 18 | Dec 22 | Feb 17 | Dec 23 |
| 1989 | Feb 8 | Dec 13 | none | none |
| 1988 | Jan 22 | Dec 27 | none | none |
| 1987 | Feb 25 | Dec 27 | Jan 19 | Dec 27 |
| 1986 | none | none | none | none |
| 1985 | Feb 7 | Dec 12 | Feb 1 | none |
| 1984 | none | none | none | none |
| 1983 | none | none | none | none |
| 1982 | none | none | none | none |
| 1981 | none | none | none | none |
| 1980 | none | none | none | none |
| 1979 | Feb 7 | none | Feb 1 | none |
| 1978 | Jan 26 | Dec 7 | none | Dec 7 |
| 1977 | Apr 5 | no data | Feb 26 | no data |
| 1976 | Mar 13 | Nov 1 | Jan 11 | Nov 28 |
| 1975 | Apr 3 | no data | Jan 21 | no data |
| 1974 | Feb 24 | Dec 11 | Feb 10 | Dec 24 |
| 1973 | no data | Nov 27 | no data | none |
| 1972 | Feb 4 | no data | none | no data |
| 1971 | Mar 2 | Dec 9 | Mar 2 | none |
| 1970 | Jan 31 | Dec 22 | none | none |
| 1969 | Jan 31 | Dec 5 | none | none |
| 1968 | Jan 9 | Dec 19 | none | Dec 22 |
| 1967 | Jan 10 | Dec 14 | none | Dec 15 |
| 1966 | Mar 5 | Dec 28 | none | none |
| 1965 | Mar 5 | none | none | none |
| 1964 | Mar 9 | Dec 14 | Feb 15 | none |
| 1963 | Jan 22 | Dec 15 | Jan 20 | none |
| 1962 | Jan 17 | none | Jan 13 | none |
| 1961 | none | none | none | none |
| 1960 | Feb 25 | Dec 7 | Jan 19 | none |
| 1959 | Jan 1 | Dec 14 | none | none |
| 1958 | Jan 25 | Nov 18 | Jan 24 | none |
| 1957 | Jan 2 | Nov 25 | none | none |
| 1956 | Feb 18 | Nov 4 | Feb 4 | Nov 21 |
| 1955 | Feb 24 | none | none | none |
| 1954 | Jan 3 | Dec 28 | none | Dec 29 |
| 1953 | none | Nov 21 | none | none |
| 1952 | Feb 13 | none | Jan 8 | none |
| 1951 | Mar 4 | Dec 8 | Feb 3 | Dec 23 |
"none" means the station recorded no freeze at that threshold in that half of the year. "no data" means more than 10% of the season's daily readings were missing. Years with no usable data are left out. See the methodology for the rules, and the ZIP lookup for 1991 to 2020 frost probabilities.