Frost history / Youngtown, AZ
Youngtown, AZ: frost dates by year
Last spring and first fall frost at NOAA station USC00029634, 1965 to 2025, measured from daily minimum temperatures.
Elevation 1,135 ft, 33.595, -112.301. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Feb 2 | Dec 10 |
| Earliest | Jan 3 (2021) | Nov 17 (2000) |
| Latest | Apr 3 (1977) | Dec 29 (2019) |
| Trend | 3.7 days earlier per decade | 2.7 days later per decade |
| Years with data | 57, 12 with no freeze | 57, 7 with no freeze |
At 28°F (hard freeze) the median last spring date is Jan 26 and the median first fall date is Dec 15.
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 22 | no data | none | no data |
| 2024 | Jan 13 | none | Jan 12 | none |
| 2023 | Jan 29 | no data | none | no data |
| 2022 | Feb 24 | Dec 14 | none | none |
| 2021 | Jan 3 | none | none | none |
| 2020 | Feb 6 | none | none | none |
| 2019 | Feb 23 | Dec 29 | Feb 20 | Dec 29 |
| 2018 | Feb 26 | Dec 28 | none | none |
| 2015 | Jan 4 | Dec 15 | Jan 2 | none |
| 2014 | none | Dec 28 | none | none |
| 2013 | Jan 16 | Dec 6 | Jan 14 | none |
| 2012 | none | Dec 29 | none | none |
| 2011 | Feb 4 | Dec 6 | Feb 4 | none |
| 2010 | none | Nov 30 | none | Dec 31 |
| 2009 | none | Dec 5 | none | none |
| 2008 | Jan 20 | Dec 27 | none | none |
| 2007 | Jan 15 | Dec 23 | Jan 15 | none |
| 2006 | no data | Nov 30 | no data | none |
| 2005 | none | Dec 16 | none | none |
| 2004 | no data | Nov 30 | no data | none |
| 2003 | none | Dec 28 | none | Dec 28 |
| 2002 | Feb 1 | none | none | none |
| 2001 | none | Dec 13 | none | none |
| 2000 | none | Nov 17 | none | none |
| 1999 | none | Dec 15 | none | none |
| 1998 | none | Dec 7 | none | none |
| 1997 | Jan 9 | Dec 25 | none | none |
| 1996 | Jan 25 | Dec 3 | none | none |
| 1995 | none | Dec 22 | none | none |
| 1994 | Feb 3 | Nov 20 | none | none |
| 1993 | none | Dec 17 | none | none |
| 1992 | Jan 14 | Dec 17 | none | none |
| 1991 | Jan 30 | Dec 3 | Jan 30 | none |
| 1990 | Feb 20 | Dec 17 | Feb 16 | Dec 23 |
| 1989 | Jan 15 | Dec 12 | none | none |
| 1988 | Jan 21 | Dec 22 | none | Dec 27 |
| 1987 | Jan 22 | Dec 14 | Jan 19 | Dec 15 |
| 1986 | Feb 11 | Dec 11 | none | none |
| 1985 | Feb 7 | Dec 10 | Feb 2 | none |
| 1984 | Jan 20 | Nov 27 | none | none |
| 1983 | Jan 22 | Nov 28 | none | none |
| 1982 | Feb 3 | none | none | none |
| 1981 | Feb 2 | Dec 24 | none | none |
| 1980 | Feb 10 | none | none | none |
| 1979 | Feb 6 | Nov 21 | Jan 30 | none |
| 1978 | Jan 26 | Dec 4 | none | Dec 7 |
| 1977 | Apr 3 | none | Jan 11 | none |
| 1976 | Jan 13 | Nov 29 | Jan 3 | Nov 29 |
| 1975 | Feb 23 | Nov 30 | Jan 4 | none |
| 1974 | Feb 24 | Dec 15 | Jan 4 | Dec 24 |
| 1973 | Jan 25 | Nov 27 | Jan 22 | none |
| 1972 | Feb 14 | Dec 6 | Feb 3 | Dec 12 |
| 1971 | Mar 3 | Dec 6 | Mar 2 | Dec 9 |
| 1970 | Feb 3 | Dec 3 | Jan 30 | none |
| 1969 | Mar 15 | Dec 8 | Mar 8 | Dec 8 |
| 1968 | Jan 6 | Nov 28 | Jan 1 | Dec 13 |
| 1967 | Feb 19 | Dec 10 | Jan 9 | Dec 11 |
| 1966 | Mar 4 | Nov 27 | Mar 4 | Dec 27 |
| 1965 | Mar 5 | Dec 20 | Feb 12 | 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 to 2020 frost probabilities.