Frost history / Vail, CO
Vail, CO: frost dates by year
Last spring and first fall frost at NOAA station USC00058575, 1989 to 2025, measured from daily minimum temperatures.
Elevation 8,304 ft, 39.639, -106.354. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Jun 19 | Sep 10 |
| Earliest | Jun 2 (2021) | Aug 17 (2025) |
| Latest | Jul 31 (1994) | Sep 24 (2000) |
| Trend | 5.0 days earlier per decade | 1.5 days earlier per decade |
| Years with data | 32 | 29 |
At 28°F (hard freeze) the median last spring date is Jun 1 and the median first fall date is Sep 19.
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 | Jun 8 | Aug 17 | May 14 | Aug 18 |
| 2024 | Jun 2 | Aug 29 | May 26 | Sep 18 |
| 2023 | Jul 23 | Sep 16 | May 8 | Sep 23 |
| 2022 | Jun 21 | Sep 11 | Jun 21 | Oct 5 |
| 2021 | Jun 2 | Sep 5 | May 25 | Sep 5 |
| 2020 | Jul 24 | Sep 10 | Jul 23 | Sep 10 |
| 2019 | Jun 24 | Aug 28 | Jun 10 | Sep 13 |
| 2018 | Jul 1 | Sep 11 | May 15 | Sep 21 |
| 2017 | Jun 14 | Sep 17 | May 29 | Sep 25 |
| 2016 | Jun 14 | Sep 8 | May 26 | Sep 10 |
| 2015 | Jun 8 | Sep 9 | May 24 | Oct 12 |
| 2014 | Jun 20 | Sep 12 | Jun 15 | Oct 3 |
| 2013 | Jun 24 | Sep 20 | Jun 1 | Sep 20 |
| 2012 | no data | Sep 8 | no data | Sep 19 |
| 2011 | Jun 16 | Sep 11 | Jun 1 | Sep 22 |
| 2010 | Jun 18 | Sep 7 | May 31 | Sep 7 |
| 2009 | Jun 16 | no data | May 11 | no data |
| 2008 | Jun 15 | Sep 2 | Jun 15 | Sep 15 |
| 2007 | Jun 11 | Sep 11 | Jun 9 | Sep 11 |
| 2006 | no data | Sep 3 | no data | Sep 4 |
| 2005 | Jun 15 | no data | Jun 11 | no data |
| 2004 | Jun 29 | Aug 28 | Jun 29 | Aug 28 |
| 2003 | Jul 13 | Sep 11 | Jun 8 | Sep 14 |
| 2002 | Jun 13 | Sep 14 | May 26 | Sep 22 |
| 2001 | Jun 17 | Sep 7 | Jun 17 | Sep 9 |
| 2000 | Jun 22 | Sep 24 | May 14 | Sep 24 |
| 1999 | Jun 11 | Sep 4 | Jun 5 | Sep 21 |
| 1998 | Jun 26 | Sep 22 | Jun 7 | Sep 27 |
| 1997 | Jul 14 | Sep 17 | May 14 | Oct 5 |
| 1996 | Jun 7 | no data | Jun 2 | no data |
| 1995 | Jun 26 | no data | Jun 12 | no data |
| 1994 | Jul 31 | Sep 16 | May 22 | Sep 22 |
| 1993 | Jul 7 | no data | Jun 5 | no data |
| 1992 | Jul 30 | no data | Jul 3 | no data |
| 1989 | no data | Aug 21 | no data | Sep 4 |
"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.