Frost history / Craig 4SW, CO
Craig 4SW, CO: frost dates by year
Last spring and first fall frost at NOAA station USC00051932, 1977 to 2025, measured from daily minimum temperatures.
Elevation 6,496 ft, 40.452, -107.591. Download the data (JSON) · NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 30 | Sep 21 |
| Earliest | Apr 25 (1992) | Aug 18 (1978) |
| Latest | Jun 25 (1978) | Oct 21 (2024) |
| Trend | 2.8 days earlier per decade | 2.3 days later per decade |
| Years with data | 39 | 40 |
At 28°F (hard freeze) the median last spring date is May 10 and the median first fall date is Oct 3.
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 | May 22 | Oct 7 | May 2 | Oct 20 |
| 2024 | May 25 | Oct 21 | May 25 | Oct 25 |
| 2023 | Apr 29 | Sep 23 | Apr 29 | Oct 13 |
| 2022 | Jun 1 | Sep 11 | May 22 | Oct 14 |
| 2021 | May 24 | Sep 22 | May 12 | Oct 13 |
| 2020 | May 26 | Sep 9 | May 8 | Sep 28 |
| 2019 | Jun 10 | Sep 22 | May 11 | Oct 3 |
| 2018 | May 3 | Sep 25 | Apr 27 | Oct 6 |
| 2017 | Jun 13 | Sep 17 | May 19 | Sep 26 |
| 2016 | May 24 | Sep 10 | May 3 | Oct 7 |
| 2015 | May 16 | Oct 13 | May 11 | Oct 28 |
| 2014 | Jun 15 | Sep 12 | May 15 | Sep 12 |
| 2013 | May 4 | Sep 26 | May 4 | Oct 4 |
| 2012 | May 29 | Oct 4 | Apr 30 | Oct 4 |
| 2011 | Jun 1 | Oct 7 | May 6 | Oct 8 |
| 2010 | May 26 | Sep 7 | May 25 | Oct 20 |
| 2009 | May 11 | Sep 22 | Apr 28 | Oct 1 |
| 2008 | Jun 13 | Oct 7 | May 2 | Oct 12 |
| 2007 | Jun 9 | Sep 25 | May 5 | Sep 25 |
| 2006 | May 30 | Sep 16 | May 12 | Sep 17 |
| 2005 | Jun 8 | Sep 13 | May 3 | Sep 15 |
| 2004 | May 30 | no data | May 30 | no data |
| 2003 | no data | Sep 13 | no data | Sep 14 |
| 2002 | May 25 | Sep 23 | May 23 | Oct 12 |
| 1993 | Jun 24 | Sep 14 | May 10 | Sep 14 |
| 1992 | Apr 25 | Aug 27 | Apr 24 | Oct 8 |
| 1991 | May 13 | Sep 16 | May 3 | Sep 23 |
| 1990 | Jun 2 | Oct 8 | May 10 | Oct 8 |
| 1989 | Jun 22 | Sep 13 | May 13 | Oct 5 |
| 1988 | May 31 | Sep 19 | May 4 | Sep 19 |
| 1987 | May 27 | Sep 18 | Apr 22 | Oct 11 |
| 1986 | May 24 | Sep 26 | May 23 | Sep 30 |
| 1985 | May 31 | Sep 13 | May 14 | Sep 23 |
| 1984 | Jun 9 | Sep 22 | May 8 | Sep 25 |
| 1983 | May 31 | Sep 20 | May 18 | Sep 20 |
| 1982 | May 31 | Sep 28 | May 7 | Oct 7 |
| 1981 | Jun 16 | Oct 1 | May 12 | Oct 1 |
| 1980 | May 26 | Aug 31 | Apr 18 | Sep 23 |
| 1979 | Jun 1 | Oct 4 | May 31 | Oct 21 |
| 1978 | Jun 25 | Aug 18 | Jun 25 | Sep 13 |
| 1977 | no data | Sep 15 | no data | Sep 15 |
"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.