Frost history / Cripple Creek 3NNW, CO
Cripple Creek 3NNW, CO: frost dates by year
Last spring and first fall frost at NOAA station USC00051977, 2007 to 2025, measured from daily minimum temperatures.
Elevation 9,235 ft, 38.796, -105.200. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 30 | Sep 22 |
| Earliest | May 14 (2009) | Sep 8 (2020) |
| Latest | Jun 23 (2019) | Oct 19 (2024) |
| Trend | 4.2 days earlier per decade | 1.3 days later per decade |
| Years with data | 17 | 19 |
At 28°F (hard freeze) the median last spring date is May 16 and the median first fall date is Oct 7.
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 | May 21 | Sep 18 | May 20 | Oct 14 |
| 2024 | May 24 | Oct 19 | May 22 | Oct 30 |
| 2023 | May 15 | Oct 4 | Apr 29 | Oct 7 |
| 2022 | Jun 2 | Sep 11 | May 25 | Oct 17 |
| 2021 | Jun 1 | Sep 21 | May 13 | Oct 10 |
| 2020 | Jun 10 | Sep 8 | Jun 9 | Sep 8 |
| 2019 | Jun 23 | Sep 22 | May 30 | Oct 3 |
| 2018 | no data | Sep 26 | no data | Oct 9 |
| 2017 | May 28 | Sep 25 | May 28 | Oct 9 |
| 2016 | May 28 | Sep 10 | May 17 | Oct 4 |
| 2015 | May 29 | Oct 16 | May 12 | Oct 28 |
| 2014 | Jun 9 | Sep 12 | May 15 | Sep 12 |
| 2013 | May 30 | Sep 23 | May 10 | Sep 28 |
| 2012 | May 28 | Oct 4 | May 14 | Oct 4 |
| 2011 | May 31 | Sep 21 | May 20 | Oct 7 |
| 2010 | Jun 14 | Oct 9 | May 16 | Oct 26 |
| 2009 | May 14 | Sep 22 | May 10 | Sep 22 |
| 2008 | Jun 12 | Sep 9 | May 16 | Oct 7 |
| 2007 | no data | Sep 25 | no data | Sep 25 |
"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.