Frost history / Wolf Pt, MT
Wolf Pt, MT: frost dates by year
Last spring and first fall frost at NOAA station USC00249103, 1975 to 2025, measured from daily minimum temperatures.
Elevation 2,090 ft, 48.100, -105.648. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 12 | Sep 21 |
| Earliest | Apr 20 (1987) | Sep 8 (2020) |
| Latest | May 30 (1982) | Oct 11 (2021) |
| Trend | 0.5 days earlier per decade | 1.5 days later per decade |
| Years with data | 29 | 24 |
At 28°F (hard freeze) the median last spring date is May 2 and the median first fall date is Oct 7.
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 | Apr 22 | Oct 5 | Apr 18 | Oct 6 |
| 2024 | no data | Oct 6 | no data | Oct 13 |
| 2023 | Apr 24 | no data | Apr 24 | no data |
| 2022 | May 22 | Sep 21 | May 22 | Oct 7 |
| 2021 | May 9 | Oct 11 | Apr 19 | Oct 20 |
| 2020 | May 11 | Sep 8 | May 11 | Oct 15 |
| 2019 | May 12 | Oct 3 | May 9 | Oct 10 |
| 2018 | May 10 | Oct 4 | Apr 24 | Oct 4 |
| 2016 | May 14 | Sep 13 | Apr 17 | Oct 12 |
| 2015 | May 21 | no data | May 21 | no data |
| 2009 | May 16 | Sep 28 | May 16 | Oct 8 |
| 2008 | May 13 | Oct 7 | May 4 | Oct 9 |
| 2003 | May 20 | Sep 18 | Apr 28 | Sep 30 |
| 2002 | no data | Sep 22 | no data | Sep 22 |
| 2001 | May 29 | no data | May 3 | no data |
| 1994 | Apr 30 | no data | Apr 30 | no data |
| 1993 | Apr 30 | Sep 14 | Apr 29 | Sep 14 |
| 1991 | May 4 | Sep 18 | May 3 | Sep 18 |
| 1990 | May 14 | no data | May 14 | no data |
| 1989 | May 6 | Sep 12 | May 2 | Oct 4 |
| 1988 | May 4 | Sep 18 | May 4 | Oct 24 |
| 1987 | Apr 20 | Oct 7 | Apr 12 | Oct 8 |
| 1986 | May 17 | Oct 11 | Apr 15 | Oct 11 |
| 1985 | May 14 | Sep 20 | Apr 22 | Sep 24 |
| 1984 | May 22 | Sep 15 | May 8 | Sep 24 |
| 1983 | May 15 | no data | May 14 | no data |
| 1982 | May 30 | Sep 20 | Apr 26 | Oct 7 |
| 1981 | May 9 | Sep 27 | May 9 | Sep 27 |
| 1980 | May 14 | no data | May 8 | no data |
| 1979 | May 10 | no data | Apr 22 | no data |
| 1977 | May 6 | Oct 4 | Apr 21 | Oct 6 |
| 1975 | no data | Sep 12 | no data | Oct 23 |
"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.