Frost history / Wild Horse 6N, CO
Wild Horse 6N, CO: frost dates by year
Last spring and first fall frost at NOAA station USC00059058, 2004 to 2018, measured from daily minimum temperatures.
Elevation 4,654 ft, 38.903, -103.019. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 4 | Oct 10 |
| Earliest | Apr 17 (2012) | Oct 2 (2009) |
| Latest | May 16 (2011) | Oct 28 (2014) |
| Trend | 2.1 days later per decade | 0.8 days earlier per decade |
| Years with data | 13 | 13 |
At 28°F (hard freeze) the median last spring date is Apr 30 and the median first fall date is Oct 16.
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 |
|---|---|---|---|---|
| 2018 | Apr 27 | no data | Apr 25 | no data |
| 2017 | May 4 | Oct 10 | Apr 6 | Oct 10 |
| 2016 | May 2 | Oct 7 | May 2 | Oct 7 |
| 2015 | May 11 | Oct 17 | May 11 | Nov 6 |
| 2014 | May 14 | Oct 28 | Apr 18 | Oct 29 |
| 2013 | May 5 | Oct 5 | May 3 | Oct 5 |
| 2012 | Apr 17 | Oct 6 | Apr 16 | Oct 18 |
| 2011 | May 16 | Oct 10 | May 3 | Oct 19 |
| 2010 | May 13 | Oct 26 | May 13 | Oct 26 |
| 2009 | Apr 19 | Oct 2 | Apr 8 | Oct 9 |
| 2008 | no data | Oct 24 | no data | Oct 24 |
| 2007 | May 6 | Oct 16 | May 6 | Oct 16 |
| 2006 | Apr 27 | no data | Apr 26 | no data |
| 2005 | May 3 | Oct 7 | Apr 30 | Oct 7 |
| 2004 | no data | Oct 14 | no data | Oct 14 |
"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.