Frost history / Old Mission 3SSW, MI
Old Mission 3SSW, MI: frost dates by year
Last spring and first fall frost at NOAA station USC00206158, 1980 to 2001, measured from daily minimum temperatures.
Elevation 656 ft, 44.921, -85.516. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 28 | Oct 4 |
| Earliest | May 9 (1991) | Sep 18 (1990) |
| Latest | Jun 13 (1985) | Oct 23 (1982) |
| Trend | 0.7 days earlier per decade | 3.0 days earlier per decade |
| Years with data | 20 | 19 |
At 28°F (hard freeze) the median last spring date is May 10 and the median first fall date is Oct 26.
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 |
|---|---|---|---|---|
| 2001 | May 31 | no data | May 13 | no data |
| 2000 | May 21 | Sep 25 | May 20 | Sep 28 |
| 1999 | May 14 | Sep 26 | Apr 29 | Oct 4 |
| 1998 | Jun 5 | Oct 4 | Apr 29 | Nov 4 |
| 1997 | May 27 | Oct 17 | May 22 | Oct 22 |
| 1996 | May 31 | Oct 4 | May 30 | Oct 4 |
| 1995 | May 18 | Sep 24 | Apr 23 | Nov 3 |
| 1994 | Jun 3 | Oct 3 | May 27 | Nov 11 |
| 1993 | Jun 1 | Sep 30 | May 16 | Nov 6 |
| 1992 | no data | Oct 18 | no data | Oct 31 |
| 1991 | May 9 | Oct 16 | May 8 | Oct 16 |
| 1990 | May 30 | Sep 18 | May 2 | Oct 26 |
| 1989 | May 11 | Sep 27 | May 9 | Sep 27 |
| 1988 | May 25 | Oct 20 | May 11 | Nov 3 |
| 1987 | no data | Oct 12 | no data | Nov 10 |
| 1986 | Jun 2 | Oct 10 | May 3 | Oct 18 |
| 1985 | Jun 13 | no data | May 2 | no data |
| 1984 | May 16 | no data | May 16 | no data |
| 1983 | May 27 | Oct 9 | May 17 | Oct 27 |
| 1982 | Jun 4 | Oct 23 | Apr 29 | Oct 23 |
| 1981 | May 31 | Sep 23 | May 19 | Oct 24 |
| 1980 | May 16 | Sep 28 | Apr 24 | Oct 30 |
"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.