Frost history / Litchfield Park, AZ
Litchfield Park, AZ: frost dates by year
Last spring and first fall frost at NOAA station USC00024977, 1952 to 2020, measured from daily minimum temperatures.
Elevation 1,040 ft, 33.499, -112.363. Download the data (JSON) · NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Feb 18 | Nov 30 |
| Earliest | Jan 3 (2019) | Oct 30 (1971) |
| Latest | Apr 3 (1977) | Dec 31 (2018) |
| Trend | 7.3 days earlier per decade | 3.4 days later per decade |
| Years with data | 56, 7 with no freeze | 58, 5 with no freeze |
At 28°F (hard freeze) the median last spring date is Jan 31 and the median first fall date is Dec 8.
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 |
|---|---|---|---|---|
| 2020 | Feb 4 | none | none | none |
| 2019 | Jan 3 | none | none | none |
| 2018 | none | Dec 31 | none | none |
| 2017 | no data | none | no data | none |
| 2016 | none | none | none | none |
| 2015 | Jan 4 | Dec 16 | Jan 2 | none |
| 2014 | none | Dec 29 | none | none |
| 2013 | Jan 16 | Dec 9 | Jan 14 | none |
| 2012 | none | none | none | none |
| 2011 | Feb 4 | Dec 6 | Feb 4 | none |
| 2010 | none | Nov 29 | none | none |
| 2009 | none | Dec 26 | none | none |
| 2008 | Jan 18 | Dec 27 | none | none |
| 2007 | Jan 17 | Dec 26 | Jan 16 | none |
| 2006 | Jan 22 | Dec 1 | none | none |
| 2005 | none | Dec 6 | none | none |
| 1996 | Jan 25 | Dec 1 | Jan 25 | Dec 19 |
| 1995 | Jan 19 | Dec 21 | none | none |
| 1994 | Feb 24 | Nov 20 | Jan 10 | Nov 20 |
| 1993 | no data | Nov 27 | no data | Dec 22 |
| 1992 | Jan 18 | Nov 25 | none | Dec 16 |
| 1991 | no data | Nov 29 | no data | Dec 2 |
| 1990 | no data | Nov 28 | no data | Dec 21 |
| 1989 | Feb 7 | no data | Jan 15 | no data |
| 1988 | Mar 12 | no data | Jan 21 | no data |
| 1987 | Feb 27 | no data | Jan 22 | no data |
| 1986 | no data | Dec 11 | no data | none |
| 1985 | Mar 4 | Nov 14 | Feb 2 | Dec 10 |
| 1984 | Feb 18 | Nov 27 | Jan 20 | none |
| 1983 | Jan 22 | Nov 27 | none | none |
| 1982 | Feb 4 | Dec 27 | none | none |
| 1981 | Feb 5 | Nov 26 | none | none |
| 1980 | Jan 5 | Nov 27 | none | none |
| 1979 | Feb 6 | Nov 20 | Jan 31 | none |
| 1978 | Jan 26 | Dec 3 | none | Dec 7 |
| 1977 | Apr 3 | Dec 17 | Feb 26 | none |
| 1976 | Mar 4 | Nov 28 | Jan 13 | Nov 29 |
| 1975 | Feb 24 | Nov 20 | Feb 22 | Nov 30 |
| 1974 | Feb 22 | Dec 10 | Jan 4 | Dec 15 |
| 1973 | Feb 2 | Nov 27 | Jan 25 | none |
| 1972 | Feb 14 | Nov 30 | Feb 3 | Dec 12 |
| 1971 | Mar 7 | Oct 30 | Mar 3 | Dec 9 |
| 1970 | Feb 3 | Dec 3 | Jan 30 | none |
| 1969 | Mar 8 | Dec 8 | Feb 1 | Dec 31 |
| 1968 | Jan 7 | Nov 28 | none | Dec 13 |
| 1967 | Feb 19 | Dec 10 | Jan 19 | none |
| 1966 | Mar 7 | Dec 10 | Mar 4 | Dec 27 |
| 1965 | Mar 6 | Dec 19 | Mar 3 | none |
| 1964 | Mar 9 | Nov 16 | Feb 28 | Nov 20 |
| 1963 | Mar 16 | Dec 11 | Jan 22 | Dec 13 |
| 1962 | Mar 15 | Dec 26 | Mar 15 | none |
| 1961 | Feb 28 | Nov 15 | none | Nov 22 |
| 1960 | Feb 26 | Nov 28 | Feb 25 | Dec 6 |
| 1959 | Mar 6 | Dec 15 | Feb 4 | none |
| 1958 | Jan 25 | Nov 17 | Jan 24 | Nov 17 |
| 1957 | Feb 1 | Nov 18 | none | Dec 3 |
| 1956 | Mar 14 | Nov 2 | Mar 13 | Nov 21 |
| 1955 | Mar 22 | Nov 16 | Feb 23 | none |
| 1954 | Feb 20 | Dec 11 | Jan 10 | Dec 22 |
| 1953 | Feb 25 | Nov 19 | Feb 21 | Nov 20 |
| 1952 | Mar 14 | Nov 18 | Feb 19 | Nov 28 |
"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.