Frost history / Fleming 3SW, CO
Fleming 3SW, CO: frost dates by year
Last spring and first fall frost at NOAA station USC00052947, 1998 to 2025, measured from daily minimum temperatures.
Elevation 4,256 ft, 40.648, -102.859. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 12 | Oct 7 |
| Earliest | Apr 22 (2012) | Sep 9 (2020) |
| Latest | May 26 (2001) | Oct 19 (2025) |
| Trend | 0.6 days earlier per decade | 1.7 days later per decade |
| Years with data | 24 | 25 |
At 28°F (hard freeze) the median last spring date is May 2 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 |
|---|---|---|---|---|
| 2025 | May 22 | Oct 19 | Apr 22 | Oct 19 |
| 2024 | May 4 | Oct 1 | May 4 | Oct 25 |
| 2023 | no data | Oct 7 | no data | Oct 14 |
| 2022 | May 23 | Oct 17 | Apr 30 | Oct 28 |
| 2021 | Apr 25 | Oct 14 | Apr 21 | Nov 3 |
| 2020 | May 21 | Sep 9 | May 21 | Oct 16 |
| 2019 | May 12 | Oct 3 | May 2 | Oct 10 |
| 2018 | Apr 27 | Oct 5 | Apr 23 | Oct 11 |
| 2017 | May 24 | Oct 9 | May 4 | Oct 10 |
| 2016 | May 12 | Oct 5 | May 2 | Oct 22 |
| 2015 | May 21 | Oct 17 | May 11 | Oct 17 |
| 2014 | May 15 | Oct 14 | May 14 | Oct 28 |
| 2013 | May 5 | no data | May 5 | no data |
| 2012 | Apr 22 | Oct 4 | Apr 8 | Oct 7 |
| 2011 | May 15 | Oct 13 | May 3 | Oct 18 |
| 2010 | May 12 | Oct 13 | May 7 | Oct 28 |
| 2009 | Apr 28 | Sep 28 | Apr 11 | Oct 3 |
| 2008 | May 14 | Oct 7 | May 11 | Oct 14 |
| 2007 | Apr 27 | Oct 8 | Apr 14 | Oct 18 |
| 2006 | May 15 | Sep 28 | Apr 26 | Sep 28 |
| 2005 | May 12 | Oct 6 | May 4 | Oct 6 |
| 2003 | May 20 | Oct 1 | Apr 9 | Oct 26 |
| 2002 | no data | Oct 12 | no data | Oct 13 |
| 2001 | May 26 | Oct 5 | Apr 23 | Oct 16 |
| 2000 | May 13 | no data | May 13 | no data |
| 1999 | May 12 | Sep 13 | May 11 | Oct 2 |
| 1998 | no data | Oct 18 | no data | Oct 21 |
"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.