Frost history / Carefree, AZ
Carefree, AZ: frost dates by year
Last spring and first fall frost at NOAA station USC00021282, 1962 to 2025, measured from daily minimum temperatures.
Elevation 2,530 ft, 33.816, -111.902. Download the data (JSON) · NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Feb 21 | Dec 12 |
| Earliest | Jan 4 (1993) | Oct 30 (1971) |
| Latest | Apr 2 (1999) | Dec 28 (2018) |
| Trend | 1.9 days earlier per decade | 2.2 days later per decade |
| Years with data | 42, 3 with no freeze | 45, 6 with no freeze |
At 28°F (hard freeze) the median last spring date is Jan 31 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 |
|---|---|---|---|---|
| 2025 | Jan 21 | no data | Jan 21 | no data |
| 2024 | Feb 11 | no data | Jan 12 | no data |
| 2023 | Mar 2 | no data | Feb 15 | no data |
| 2022 | no data | Dec 14 | no data | none |
| 2021 | no data | Dec 15 | no data | Dec 29 |
| 2020 | Feb 6 | no data | Feb 6 | no data |
| 2019 | Feb 24 | Dec 17 | Feb 24 | Dec 29 |
| 2018 | Feb 25 | Dec 28 | none | Dec 30 |
| 2016 | Feb 4 | none | Feb 3 | none |
| 2015 | no data | Nov 30 | no data | none |
| 2014 | no data | Dec 26 | no data | none |
| 2009 | Jan 31 | Dec 9 | Jan 31 | none |
| 2008 | Feb 6 | Dec 28 | Jan 17 | none |
| 2007 | Mar 1 | Dec 15 | Jan 15 | none |
| 2006 | Mar 13 | Nov 30 | none | none |
| 2005 | no data | Nov 28 | no data | none |
| 2004 | Feb 5 | Nov 30 | none | none |
| 2003 | none | Dec 27 | none | Dec 29 |
| 2002 | Mar 3 | none | Mar 3 | none |
| 2001 | Jan 19 | Dec 13 | none | none |
| 2000 | Jan 4 | none | none | none |
| 1999 | Apr 2 | none | none | none |
| 1998 | none | Dec 6 | none | Dec 7 |
| 1997 | Mar 1 | Dec 26 | Jan 8 | Dec 26 |
| 1996 | Mar 1 | Dec 18 | none | Dec 18 |
| 1995 | Jan 18 | none | none | none |
| 1994 | none | Nov 20 | none | Nov 20 |
| 1993 | Jan 4 | Nov 26 | none | Dec 24 |
| 1992 | Jan 16 | Dec 15 | none | none |
| 1991 | Mar 29 | Dec 2 | none | Dec 2 |
| 1990 | Mar 14 | Dec 21 | Feb 16 | Dec 21 |
| 1989 | Mar 4 | Dec 12 | Feb 7 | none |
| 1988 | Jan 23 | Dec 22 | Jan 20 | Dec 27 |
| 1987 | Feb 27 | Dec 14 | Jan 21 | Dec 14 |
| 1986 | no data | Dec 11 | no data | none |
| 1984 | Jan 22 | no data | none | no data |
| 1983 | Jan 22 | Nov 26 | none | none |
| 1982 | no data | Dec 2 | no data | none |
| 1974 | no data | Dec 7 | no data | Dec 24 |
| 1973 | Mar 23 | Nov 28 | Jan 22 | none |
| 1972 | Feb 7 | Dec 6 | Jan 5 | Dec 12 |
| 1971 | Mar 3 | Oct 30 | Mar 2 | Dec 10 |
| 1970 | Jan 31 | none | Jan 6 | none |
| 1969 | Mar 16 | Nov 18 | Mar 7 | Dec 31 |
| 1968 | Jan 28 | no data | none | no data |
| 1967 | Feb 21 | Dec 1 | Jan 9 | none |
| 1966 | Mar 5 | Dec 27 | Mar 3 | Dec 27 |
| 1965 | Mar 4 | Dec 19 | Feb 12 | none |
| 1964 | Mar 9 | Nov 16 | Mar 9 | Nov 16 |
| 1963 | Feb 13 | Dec 13 | Jan 20 | Dec 13 |
| 1962 | no data | Dec 25 | no data | none |
"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 1991–2020 frost probabilities.