Frost history / Nye #2, MT
Nye #2, MT: frost dates by year
Last spring and first fall frost at NOAA station USC00246190, 1981 to 2019, measured from daily minimum temperatures.
Elevation 4,840 ft, 45.435, -109.808. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Jun 2 | Sep 10 |
| Earliest | Apr 27 (2018) | Aug 17 (2002) |
| Latest | Jul 6 (1986) | Sep 22 (2009) |
| Trend | 6.7 days earlier per decade | 1.5 days earlier per decade |
| Years with data | 29 | 35 |
At 28°F (hard freeze) the median last spring date is May 12 and the median first fall date is Sep 21.
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 |
|---|---|---|---|---|
| 2019 | May 27 | no data | May 11 | no data |
| 2018 | Apr 27 | no data | Apr 25 | no data |
| 2017 | no data | Sep 20 | no data | Oct 4 |
| 2016 | Jun 1 | Sep 6 | May 2 | Oct 6 |
| 2015 | May 21 | Aug 24 | May 11 | Oct 16 |
| 2014 | no data | Sep 5 | no data | Sep 12 |
| 2012 | May 31 | Aug 25 | May 12 | Sep 12 |
| 2011 | no data | Sep 2 | no data | Sep 20 |
| 2010 | May 21 | Sep 7 | May 9 | Oct 12 |
| 2009 | May 21 | Sep 22 | May 16 | Sep 28 |
| 2007 | May 24 | Sep 10 | May 24 | Sep 25 |
| 2006 | May 15 | Sep 2 | May 11 | Oct 10 |
| 2005 | no data | Sep 22 | no data | Oct 5 |
| 2004 | May 25 | Sep 4 | May 14 | Sep 21 |
| 2003 | Jun 7 | Sep 17 | May 20 | Sep 18 |
| 2002 | May 26 | Aug 17 | May 23 | Sep 22 |
| 2001 | Jun 4 | Sep 20 | May 11 | Oct 5 |
| 2000 | Jun 2 | Sep 20 | May 1 | Sep 22 |
| 1999 | Jun 10 | Sep 8 | Jun 10 | Sep 13 |
| 1998 | no data | Sep 22 | no data | Oct 12 |
| 1997 | May 20 | Sep 20 | May 19 | Sep 20 |
| 1996 | no data | Sep 18 | no data | Sep 23 |
| 1995 | Jun 10 | Sep 19 | May 28 | Sep 21 |
| 1994 | Jun 15 | Sep 5 | May 4 | Sep 22 |
| 1993 | Jun 18 | Aug 27 | Apr 25 | Sep 14 |
| 1992 | Jun 4 | Aug 24 | May 12 | Sep 14 |
| 1991 | Jun 18 | Sep 18 | May 5 | Sep 18 |
| 1990 | Jun 3 | Sep 14 | May 16 | Sep 29 |
| 1989 | Jun 26 | Aug 26 | May 2 | Sep 11 |
| 1988 | May 22 | Sep 8 | May 20 | Sep 19 |
| 1987 | Jun 3 | Sep 12 | Jun 3 | Sep 17 |
| 1986 | Jul 6 | Sep 7 | May 12 | Oct 9 |
| 1985 | May 18 | Sep 20 | Apr 27 | Sep 20 |
| 1984 | Jun 2 | Sep 13 | Jun 2 | Sep 13 |
| 1983 | no data | Sep 6 | no data | Sep 19 |
| 1982 | Jun 5 | Sep 14 | May 31 | Sep 15 |
| 1981 | no data | Sep 17 | no data | Sep 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.