Frost history / Warren Wsd, MN
Warren Wsd, MN: frost dates by year
Last spring and first fall frost at NOAA station USC00218674, 2015 to 2024, measured from daily minimum temperatures.
Elevation 855 ft, 48.195, -96.776. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 10 | Oct 9 |
| Earliest | Apr 24 (2024) | Sep 8 (2020) |
| Latest | Jun 1 (2015) | Oct 17 (2021) |
| Trend | 25.9 days earlier per decade | 5.0 days later per decade |
| Years with data | 10 | 10 |
At 28°F (hard freeze) the median last spring date is May 4 and the median first fall date is Oct 15.
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 |
|---|---|---|---|---|
| 2024 | Apr 24 | Oct 15 | Apr 24 | Oct 26 |
| 2023 | May 2 | Oct 10 | Apr 25 | Oct 27 |
| 2022 | May 3 | Oct 6 | May 2 | Oct 7 |
| 2021 | May 10 | Oct 17 | May 7 | Oct 21 |
| 2020 | May 12 | Sep 8 | May 12 | Oct 2 |
| 2019 | May 17 | Oct 11 | May 10 | Oct 24 |
| 2018 | May 10 | Sep 28 | Apr 17 | Sep 29 |
| 2017 | May 1 | Oct 10 | May 1 | Oct 10 |
| 2016 | May 15 | Oct 9 | May 14 | Oct 13 |
| 2015 | Jun 1 | Oct 7 | May 19 | Oct 16 |
"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.