Frost history / Elizabeth 2NW, CO
Elizabeth 2NW, CO: frost dates by year
Last spring and first fall frost at NOAA station USC00052631, 1997 to 2025, measured from daily minimum temperatures.
Elevation 6,611 ft, 39.380, -104.629. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 16 | Oct 8 |
| Earliest | Apr 18 (2020) | Sep 8 (2001) |
| Latest | Jun 14 (2001) | Oct 30 (2024) |
| Trend | 7.0 days earlier per decade | 6.9 days later per decade |
| Years with data | 18 | 21 |
At 28°F (hard freeze) the median last spring date is May 8 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 |
|---|---|---|---|---|
| 2025 | May 8 | Oct 19 | Apr 29 | Oct 28 |
| 2024 | May 22 | Oct 30 | Apr 21 | Oct 30 |
| 2023 | Apr 29 | Oct 13 | Apr 24 | Oct 14 |
| 2022 | May 22 | Oct 24 | May 21 | Oct 24 |
| 2021 | May 11 | Oct 13 | Apr 23 | Oct 16 |
| 2020 | Apr 18 | Sep 9 | Apr 18 | Sep 9 |
| 2019 | no data | Oct 10 | no data | Oct 10 |
| 2012 | Apr 30 | Oct 4 | Apr 29 | Oct 4 |
| 2011 | May 20 | Oct 8 | May 5 | Oct 18 |
| 2010 | May 14 | Oct 18 | May 13 | Oct 27 |
| 2009 | Apr 28 | Oct 2 | Apr 18 | Oct 2 |
| 2008 | no data | Oct 22 | no data | Oct 23 |
| 2007 | Jun 9 | Sep 25 | May 6 | Oct 22 |
| 2006 | May 12 | Sep 17 | May 11 | Oct 18 |
| 2005 | May 13 | Oct 6 | May 12 | Oct 31 |
| 2004 | no data | Oct 14 | no data | Oct 14 |
| 2001 | Jun 14 | Sep 8 | May 21 | Oct 5 |
| 2000 | May 18 | Sep 20 | May 13 | Sep 24 |
| 1999 | May 17 | Sep 27 | May 16 | Sep 28 |
| 1998 | Jun 5 | Oct 5 | May 10 | Oct 5 |
| 1997 | May 19 | Oct 9 | May 12 | Oct 12 |
"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.