Frost history / Estes Park 3 Sse, CO
Estes Park 3 Sse, CO: frost dates by year
Last spring and first fall frost at NOAA station USC00052761, 2001 to 2020, measured from daily minimum temperatures.
Elevation 7,812 ft, 40.349, -105.520. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 25 | Sep 17 |
| Earliest | May 16 (2006) | Aug 28 (2004) |
| Latest | Jun 22 (2004) | Oct 7 (2008) |
| Trend | 4.5 days earlier per decade | 5.0 days later per decade |
| Years with data | 19 | 20 |
At 28°F (hard freeze) the median last spring date is May 14 and the median first fall date is Oct 5.
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 |
|---|---|---|---|---|
| 2020 | May 26 | Sep 8 | May 26 | Sep 8 |
| 2019 | Jun 10 | Sep 22 | May 30 | Oct 3 |
| 2018 | May 17 | Sep 21 | May 5 | Sep 26 |
| 2017 | May 28 | Sep 25 | May 20 | Oct 3 |
| 2016 | May 24 | Sep 10 | May 12 | Oct 20 |
| 2015 | May 25 | Sep 19 | May 12 | Oct 24 |
| 2014 | May 16 | Sep 12 | May 15 | Sep 12 |
| 2013 | Jun 2 | Oct 4 | May 5 | Oct 5 |
| 2012 | May 21 | Oct 4 | May 14 | Oct 4 |
| 2011 | May 20 | Sep 21 | May 20 | Sep 22 |
| 2010 | May 25 | Sep 7 | May 15 | Oct 14 |
| 2009 | May 27 | Sep 22 | Apr 29 | Sep 28 |
| 2008 | May 23 | Oct 7 | May 14 | Oct 13 |
| 2007 | Jun 8 | Sep 11 | Jun 8 | Oct 22 |
| 2006 | May 16 | Sep 3 | May 12 | Sep 24 |
| 2005 | May 28 | Sep 14 | May 4 | Oct 6 |
| 2004 | Jun 22 | Aug 28 | May 15 | Oct 12 |
| 2003 | Jun 8 | Sep 14 | May 12 | Sep 14 |
| 2002 | May 25 | Sep 19 | May 24 | Oct 13 |
| 2001 | no data | Sep 8 | no data | Oct 5 |
"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.