Frost history / Joes, CO
Joes, CO: frost dates by year
Last spring and first fall frost at NOAA station USC00054380, 1981 to 2022, measured from daily minimum temperatures.
Elevation 4,275 ft, 39.655, -102.680. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 6 | Oct 8 |
| Earliest | Apr 16 (1986) | Sep 9 (2020) |
| Latest | May 26 (1992) | Oct 26 (2010) |
| Trend | 0.5 days earlier per decade | 1.3 days later per decade |
| Years with data | 34 | 35 |
At 28°F (hard freeze) the median last spring date is Apr 28 and the median first fall date is Oct 14.
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 |
|---|---|---|---|---|
| 2022 | May 2 | no data | May 1 | no data |
| 2021 | Apr 25 | Oct 14 | Apr 22 | Oct 14 |
| 2020 | May 6 | Sep 9 | Apr 18 | Oct 16 |
| 2019 | May 22 | Oct 10 | May 2 | Oct 10 |
| 2018 | Apr 28 | Oct 10 | Apr 25 | Oct 14 |
| 2017 | May 24 | no data | Apr 11 | no data |
| 2016 | May 2 | no data | May 2 | no data |
| 2015 | no data | Oct 17 | no data | Oct 29 |
| 2014 | no data | Oct 15 | no data | Oct 27 |
| 2013 | May 6 | Oct 5 | May 5 | Oct 16 |
| 2012 | Apr 17 | Oct 4 | Mar 22 | Oct 7 |
| 2011 | May 14 | Oct 10 | May 2 | Oct 19 |
| 2010 | May 14 | Oct 26 | May 1 | Oct 28 |
| 2009 | Apr 28 | Oct 2 | Apr 10 | Oct 3 |
| 2007 | Apr 26 | Oct 8 | Apr 14 | Oct 16 |
| 2006 | May 12 | Oct 13 | Apr 26 | Oct 19 |
| 2005 | May 12 | Oct 6 | May 1 | Oct 7 |
| 2004 | May 13 | Oct 14 | Apr 21 | Oct 23 |
| 2003 | Apr 21 | Sep 19 | Apr 7 | Oct 26 |
| 2002 | May 25 | Oct 13 | Apr 28 | Oct 13 |
| 2001 | Apr 23 | Oct 6 | Apr 23 | Oct 13 |
| 2000 | May 13 | Sep 24 | May 13 | Oct 6 |
| 1999 | May 7 | Sep 29 | Apr 18 | Sep 29 |
| 1998 | Apr 30 | Oct 6 | Apr 29 | Oct 19 |
| 1997 | May 12 | Oct 8 | May 9 | Oct 13 |
| 1996 | Apr 30 | Sep 27 | Apr 30 | Oct 18 |
| 1995 | May 18 | Oct 14 | Apr 12 | Oct 24 |
| 1994 | May 1 | Oct 18 | Apr 28 | Oct 24 |
| 1993 | May 2 | Sep 14 | May 2 | Oct 9 |
| 1992 | May 26 | Oct 8 | Apr 26 | Oct 8 |
| 1991 | May 5 | Oct 5 | May 1 | Oct 5 |
| 1990 | May 10 | Oct 8 | Apr 12 | Oct 9 |
| 1989 | May 6 | Sep 11 | May 1 | Oct 18 |
| 1988 | May 5 | Oct 4 | Apr 29 | Oct 28 |
| 1987 | no data | Oct 7 | no data | Oct 11 |
| 1986 | Apr 16 | Oct 11 | Apr 15 | Oct 11 |
| 1985 | no data | Sep 24 | no data | Sep 28 |
| 1981 | May 19 | Oct 17 | May 15 | Oct 22 |
"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.