Frost history / Trout Lake 1SW, MI
Trout Lake 1SW, MI: frost dates by year
Last spring and first fall frost at NOAA station USC00208293, 1978 to 2017, measured from daily minimum temperatures.
Elevation 823 ft, 46.180, -85.031. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 31 | Sep 21 |
| Earliest | May 10 (2010) | Aug 12 (1979) |
| Latest | Jul 21 (1992) | Oct 14 (2013) |
| Trend | 9.1 days earlier per decade | 11.2 days later per decade |
| Years with data | 28 | 32 |
At 28°F (hard freeze) the median last spring date is May 12 and the median first fall date is Oct 1.
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 |
|---|---|---|---|---|
| 2017 | May 20 | no data | May 9 | no data |
| 2013 | Jun 3 | Oct 14 | May 13 | Oct 22 |
| 2012 | May 10 | Oct 7 | Apr 30 | Oct 8 |
| 2011 | May 27 | Sep 16 | May 3 | Oct 22 |
| 2010 | May 10 | Oct 3 | May 10 | Oct 3 |
| 2009 | May 31 | Oct 1 | May 18 | Oct 1 |
| 2008 | May 28 | Oct 3 | May 4 | Oct 17 |
| 2007 | Jun 6 | Oct 12 | Apr 25 | Oct 25 |
| 2006 | May 22 | Sep 29 | May 6 | Sep 29 |
| 2005 | May 16 | Oct 8 | May 12 | Oct 8 |
| 2004 | May 29 | Oct 5 | May 7 | Oct 5 |
| 2003 | May 22 | Oct 1 | May 4 | Oct 6 |
| 2002 | May 25 | Oct 8 | May 25 | Oct 14 |
| 2001 | May 31 | Sep 14 | Apr 28 | Oct 7 |
| 2000 | Jun 6 | Sep 5 | May 20 | Sep 28 |
| 1999 | Jun 15 | Sep 21 | May 9 | Oct 3 |
| 1998 | Jun 5 | Sep 23 | Jun 1 | Sep 23 |
| 1997 | May 27 | Sep 4 | May 18 | Sep 24 |
| 1996 | May 30 | Sep 30 | May 30 | Oct 3 |
| 1995 | no data | Sep 8 | no data | Sep 23 |
| 1994 | no data | Sep 2 | no data | Oct 2 |
| 1993 | no data | Sep 16 | no data | Sep 19 |
| 1992 | Jul 21 | no data | May 26 | no data |
| 1991 | May 20 | Sep 21 | May 8 | Sep 28 |
| 1990 | Jun 4 | Sep 17 | May 11 | Sep 17 |
| 1989 | Jun 5 | Sep 23 | Jun 5 | Sep 24 |
| 1988 | no data | Sep 26 | no data | Oct 3 |
| 1984 | Jun 15 | Sep 4 | Jun 10 | Sep 17 |
| 1983 | Jul 6 | Sep 14 | Jul 5 | Sep 14 |
| 1982 | Jun 18 | Aug 29 | Jun 5 | Aug 29 |
| 1981 | May 31 | Aug 17 | May 31 | Sep 9 |
| 1980 | no data | Sep 15 | no data | Sep 15 |
| 1979 | Jun 25 | Aug 12 | May 16 | Sep 19 |
| 1978 | no data | Aug 31 | no data | Oct 14 |
"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.