Frost history / Yellow Jacket 4NE, CO
Yellow Jacket 4NE, CO: frost dates by year
Last spring and first fall frost at NOAA station USC00059278, 2005 to 2016, measured from daily minimum temperatures.
Elevation 7,090 ft, 37.559, -108.664. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 12 | Oct 5 |
| Earliest | May 1 (2009) | Sep 17 (2006) |
| Latest | Jun 7 (2007) | Oct 28 (2015) |
| Trend | 18.0 days earlier per decade | 12.4 days later per decade |
| Years with data | 10 | 12 |
At 28°F (hard freeze) the median last spring date is May 2 and the median first fall date is Oct 10.
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 |
|---|---|---|---|---|
| 2016 | May 8 | Oct 4 | Apr 30 | Oct 4 |
| 2015 | May 11 | Oct 28 | Apr 18 | Oct 28 |
| 2014 | May 15 | Oct 3 | May 15 | Oct 13 |
| 2013 | May 3 | Sep 28 | May 2 | Oct 4 |
| 2012 | no data | Oct 8 | no data | Oct 18 |
| 2011 | no data | Oct 7 | no data | Oct 8 |
| 2010 | May 13 | Oct 8 | May 12 | Oct 26 |
| 2009 | May 1 | Sep 22 | Apr 27 | Sep 22 |
| 2008 | May 26 | Oct 12 | May 3 | Oct 12 |
| 2007 | Jun 7 | Sep 30 | Jun 7 | Sep 30 |
| 2006 | May 10 | Sep 17 | Apr 20 | Sep 18 |
| 2005 | Jun 3 | Oct 5 | May 11 | Oct 31 |
"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.