Frost history / Eastonville 2 Nnw, CO
Eastonville 2 Nnw, CO: frost dates by year
Last spring and first fall frost at NOAA station USC00052494, 2011 to 2025, measured from daily minimum temperatures.
Elevation 7,210 ft, 39.109, -104.600. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 31 | Sep 17 |
| Earliest | May 5 (2018) | Sep 4 (2024) |
| Latest | Jun 14 (2014) | Sep 27 (2018) |
| Trend | 5.9 days earlier per decade | 1.6 days earlier per decade |
| Years with data | 15 | 14 |
At 28°F (hard freeze) the median last spring date is May 21 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 |
|---|---|---|---|---|
| 2025 | May 22 | Sep 25 | May 21 | Oct 17 |
| 2024 | May 31 | Sep 4 | May 24 | Oct 22 |
| 2023 | May 17 | Sep 16 | May 8 | Oct 5 |
| 2022 | Jun 1 | Sep 13 | May 22 | Oct 6 |
| 2021 | Jun 1 | Sep 21 | May 24 | Sep 21 |
| 2020 | Jun 11 | Sep 8 | Jun 10 | Sep 8 |
| 2019 | May 30 | Sep 21 | May 21 | Sep 21 |
| 2018 | May 5 | Sep 27 | May 4 | Sep 27 |
| 2017 | Jun 13 | no data | May 20 | no data |
| 2016 | May 30 | Sep 10 | May 12 | Sep 16 |
| 2015 | May 24 | Sep 20 | May 11 | Oct 25 |
| 2014 | Jun 14 | Sep 12 | May 14 | Sep 12 |
| 2013 | Jun 2 | Sep 24 | May 20 | Oct 5 |
| 2012 | Jun 11 | Sep 14 | May 29 | Oct 4 |
| 2011 | May 22 | Sep 18 | May 21 | Oct 9 |
"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.