Frost history / Brady 27 Ene (The Knees), MT
Brady 27 Ene (The Knees), MT: frost dates by year
Last spring and first fall frost at NOAA station USC00241081, 2013 to 2025, measured from daily minimum temperatures.
Elevation 3,325 ft, 48.075, -111.260. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 12 | Oct 1 |
| Earliest | Apr 16 (2017) | Sep 13 (2016) |
| Latest | May 23 (2025) | Oct 23 (2022) |
| Trend | 14.1 days later per decade | 16.6 days later per decade |
| Years with data | 13 | 12 |
At 28°F (hard freeze) the median last spring date is May 7 and the median first fall date is Oct 11.
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 23 | Oct 6 | May 7 | Oct 6 |
| 2024 | May 21 | Sep 30 | May 5 | Oct 18 |
| 2023 | May 10 | Oct 21 | Apr 24 | Oct 24 |
| 2022 | May 23 | Oct 23 | May 23 | Oct 24 |
| 2021 | May 23 | Oct 8 | May 21 | Oct 12 |
| 2020 | May 10 | Oct 13 | May 7 | Oct 15 |
| 2019 | May 9 | Sep 29 | May 9 | Sep 29 |
| 2018 | Apr 24 | Sep 30 | Apr 13 | Oct 3 |
| 2017 | Apr 16 | Sep 24 | Apr 16 | Oct 4 |
| 2016 | May 14 | Sep 13 | Apr 8 | Oct 11 |
| 2015 | May 18 | Sep 28 | May 10 | Oct 15 |
| 2014 | May 12 | no data | May 12 | no data |
| 2013 | May 2 | Oct 2 | May 1 | Oct 4 |
"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.