Frost history / Sierra Vista, AZ
Sierra Vista, AZ: frost dates by year
Last spring and first fall frost at NOAA station USC00027880, 1982 to 2025, measured from daily minimum temperatures.
Elevation 4,606 ft, 31.537, -110.281. Download the data (JSON) · NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Mar 28 | Nov 16 |
| Earliest | Feb 12 (1986) | Oct 13 (2021) |
| Latest | Apr 14 (1983) | Dec 10 (2008) |
| Trend | 4.2 days later per decade | 2.9 days earlier per decade |
| Years with data | 28 | 28 |
At 28°F (hard freeze) the median last spring date is Mar 3 and the median first fall date is Nov 28.
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 | Apr 6 | Nov 21 | Mar 16 | Nov 21 |
| 2024 | Apr 7 | no data | Apr 7 | no data |
| 2023 | Apr 6 | Nov 1 | Apr 5 | Dec 2 |
| 2022 | Apr 13 | Oct 25 | Mar 12 | Nov 4 |
| 2021 | Mar 27 | Oct 13 | Mar 25 | Dec 12 |
| 2020 | Mar 28 | Oct 27 | Mar 28 | Oct 27 |
| 2019 | Apr 13 | Oct 26 | Mar 15 | Oct 31 |
| 2018 | Mar 27 | Nov 12 | Mar 2 | Nov 12 |
| 2017 | no data | Dec 8 | no data | Dec 8 |
| 2009 | Feb 20 | no data | Feb 13 | no data |
| 2008 | no data | Dec 10 | no data | Dec 27 |
| 2007 | Mar 29 | Nov 25 | Mar 2 | Dec 15 |
| 2006 | Mar 21 | no data | Mar 20 | no data |
| 2005 | Mar 16 | Nov 28 | Jan 30 | Dec 5 |
| 2004 | Mar 1 | Nov 2 | Feb 14 | Nov 30 |
| 2003 | Mar 29 | Nov 23 | Feb 9 | Nov 23 |
| 2002 | Mar 17 | Oct 29 | Mar 4 | Dec 5 |
| 2001 | Apr 11 | Nov 24 | Feb 10 | Nov 27 |
| 2000 | Mar 21 | Nov 7 | Jan 8 | Nov 8 |
| 1999 | Apr 10 | Nov 24 | Apr 5 | Dec 4 |
| 1997 | Apr 4 | no data | Feb 7 | no data |
| 1996 | no data | Oct 22 | no data | Dec 15 |
| 1994 | Mar 28 | no data | Feb 1 | no data |
| 1992 | no data | Nov 23 | no data | Nov 25 |
| 1990 | Mar 16 | Nov 28 | Mar 14 | Dec 17 |
| 1989 | Mar 5 | Oct 30 | Jan 30 | Nov 30 |
| 1988 | Mar 13 | Nov 16 | Mar 12 | Nov 28 |
| 1987 | Mar 30 | Nov 16 | Jan 22 | Nov 16 |
| 1986 | Feb 12 | Nov 23 | Feb 12 | Dec 11 |
| 1985 | Mar 31 | Nov 14 | Mar 31 | Nov 15 |
| 1984 | Mar 7 | Nov 20 | Mar 6 | Nov 27 |
| 1983 | Apr 14 | Nov 22 | Feb 3 | Nov 22 |
| 1982 | no data | Nov 12 | no data | Nov 12 |
"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.