Frost history / Placerville, CO
Placerville, CO: frost dates by year
Last spring and first fall frost at NOAA station USC00056520, 2009 to 2025, measured from daily minimum temperatures.
Elevation 7,383 ft, 38.018, -108.051. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 30 | Sep 24 |
| Earliest | May 12 (2023) | Aug 15 (2010) |
| Latest | Jun 23 (2019) | Oct 23 (2015) |
| Trend | 6.9 days earlier per decade | 12.2 days later per decade |
| Years with data | 16 | 17 |
At 28°F (hard freeze) the median last spring date is May 20 and the median first fall date is Oct 6.
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 | Oct 5 | May 21 | Oct 5 |
| 2024 | May 24 | Oct 21 | May 23 | Oct 30 |
| 2023 | May 12 | Sep 22 | May 6 | Oct 13 |
| 2022 | May 31 | Oct 13 | May 26 | Oct 23 |
| 2021 | May 25 | Sep 21 | May 25 | Oct 11 |
| 2020 | Jun 10 | Sep 9 | May 21 | Sep 28 |
| 2019 | Jun 23 | Sep 21 | May 25 | Oct 3 |
| 2018 | May 20 | Oct 6 | May 4 | Oct 9 |
| 2017 | Jun 14 | Sep 24 | May 20 | Sep 25 |
| 2016 | May 30 | Sep 25 | May 30 | Oct 4 |
| 2015 | May 24 | Oct 23 | May 12 | Oct 27 |
| 2014 | Jun 8 | Oct 1 | May 14 | Oct 13 |
| 2013 | Jun 1 | Sep 23 | May 3 | Sep 27 |
| 2012 | no data | Sep 16 | no data | Sep 28 |
| 2011 | Jun 2 | Oct 6 | May 30 | Oct 6 |
| 2010 | May 29 | Aug 15 | May 11 | Oct 9 |
| 2009 | Jun 6 | Sep 22 | Apr 26 | Sep 22 |
"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.