Frost history / Grouse Creek, UT
Grouse Creek, UT: frost dates by year
Last spring and first fall frost at NOAA station USC00423486, 1959 to 2011, measured from daily minimum temperatures.
Elevation 5,320 ft, 41.714, -113.869. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Jun 13 | Sep 11 |
| Earliest | May 15 (1963) | Aug 8 (1993) |
| Latest | Jul 31 (1995) | Oct 14 (1963) |
| Trend | 1.4 days earlier per decade | 1.2 days earlier per decade |
| Years with data | 31 | 30 |
At 28°F (hard freeze) the median last spring date is May 20 and the median first fall date is Sep 22.
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 |
|---|---|---|---|---|
| 2011 | Jun 17 | no data | Jun 3 | no data |
| 2010 | Jun 17 | Sep 6 | Jun 17 | Sep 6 |
| 2009 | May 16 | no data | May 10 | no data |
| 2008 | no data | Sep 2 | no data | Sep 2 |
| 2007 | May 30 | no data | May 23 | no data |
| 2006 | May 30 | Aug 31 | May 3 | Sep 17 |
| 2005 | Jun 13 | Aug 31 | Apr 29 | Sep 25 |
| 2004 | May 30 | Sep 4 | May 15 | Sep 15 |
| 2003 | May 20 | Sep 14 | May 20 | Sep 18 |
| 2002 | Jun 19 | no data | Jun 11 | no data |
| 2000 | Jun 1 | Sep 23 | May 13 | Sep 24 |
| 1999 | Jun 26 | Sep 4 | Jun 9 | Sep 27 |
| 1998 | May 19 | Oct 4 | Apr 26 | Oct 4 |
| 1997 | May 19 | Sep 17 | May 7 | Oct 6 |
| 1996 | Jun 19 | Sep 6 | May 5 | Sep 18 |
| 1995 | Jul 31 | Sep 21 | Apr 27 | Sep 22 |
| 1994 | Jun 7 | Oct 4 | Jun 7 | Oct 8 |
| 1993 | Jun 24 | Aug 8 | Jun 24 | Sep 14 |
| 1992 | Jun 13 | Aug 26 | May 10 | Sep 13 |
| 1991 | Jun 15 | Sep 15 | May 12 | Oct 5 |
| 1990 | Jun 1 | Oct 3 | May 25 | Oct 3 |
| 1989 | no data | Sep 10 | no data | Oct 4 |
| 1988 | Jun 30 | Sep 18 | May 20 | Sep 19 |
| 1987 | Jun 1 | Sep 4 | Jun 1 | Sep 17 |
| 1986 | Jul 5 | Sep 16 | May 23 | Sep 27 |
| 1985 | Jun 27 | Sep 12 | May 15 | Sep 12 |
| 1984 | Jun 11 | Sep 22 | Jun 9 | Sep 22 |
| 1983 | Jun 19 | Sep 10 | May 14 | Sep 20 |
| 1968 | Jul 1 | no data | Jun 30 | no data |
| 1967 | Jun 1 | no data | May 14 | no data |
| 1965 | no data | Aug 30 | no data | Aug 30 |
| 1963 | May 15 | Oct 14 | May 13 | Oct 24 |
| 1962 | Jun 7 | Aug 24 | May 25 | Sep 9 |
| 1961 | no data | Sep 22 | no data | Sep 22 |
| 1960 | Jun 21 | Aug 23 | Jun 21 | Oct 13 |
| 1959 | no data | Sep 28 | no data | Sep 28 |
"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.