Frost history / Rudyard 4N, MI
Rudyard 4N, MI: frost dates by year
Last spring and first fall frost at NOAA station USC00207190, 1978 to 2009, measured from daily minimum temperatures.
Elevation 753 ft, 46.296, -84.576. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Jun 2 | Sep 20 |
| Earliest | May 6 (1995) | Aug 16 (1979) |
| Latest | Jun 29 (1989) | Oct 8 (2002) |
| Trend | 4.4 days earlier per decade | 7.9 days later per decade |
| Years with data | 24 | 28 |
At 28°F (hard freeze) the median last spring date is May 19 and the median first fall date is Oct 4.
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 |
|---|---|---|---|---|
| 2009 | Jun 3 | no data | May 18 | no data |
| 2008 | May 28 | Oct 3 | May 28 | Oct 17 |
| 2007 | Jun 6 | Sep 27 | May 13 | Oct 13 |
| 2006 | no data | Sep 10 | no data | Oct 6 |
| 2004 | May 29 | Oct 3 | May 7 | Nov 3 |
| 2003 | Jun 1 | Oct 1 | May 4 | Oct 2 |
| 2002 | May 25 | Oct 8 | May 25 | Oct 14 |
| 2001 | May 31 | Oct 6 | Apr 28 | Oct 7 |
| 2000 | May 21 | Sep 22 | May 20 | Oct 5 |
| 1999 | Jun 16 | Sep 21 | Apr 27 | Oct 4 |
| 1998 | no data | Oct 3 | no data | Oct 4 |
| 1997 | May 23 | Sep 24 | May 14 | Oct 1 |
| 1996 | no data | Sep 30 | no data | Oct 4 |
| 1995 | May 6 | no data | Apr 23 | no data |
| 1994 | May 27 | Sep 2 | May 13 | Oct 11 |
| 1993 | Jun 4 | Sep 6 | Jun 1 | Sep 19 |
| 1992 | no data | Sep 11 | no data | Sep 23 |
| 1991 | no data | Sep 19 | no data | Sep 21 |
| 1990 | May 11 | Sep 16 | May 6 | Sep 17 |
| 1989 | Jun 29 | Sep 13 | Jun 5 | Sep 14 |
| 1988 | Jun 17 | Sep 5 | Jun 17 | Sep 16 |
| 1987 | Jun 10 | Sep 4 | May 24 | Sep 5 |
| 1985 | May 22 | Sep 13 | May 8 | Oct 7 |
| 1984 | May 27 | Sep 26 | May 16 | Sep 27 |
| 1983 | Jun 8 | Sep 15 | Jun 8 | Oct 9 |
| 1982 | Jun 5 | Aug 29 | Jun 4 | Oct 23 |
| 1981 | Jun 7 | Sep 9 | May 31 | Sep 21 |
| 1980 | Jun 16 | Sep 24 | Jun 11 | Sep 24 |
| 1979 | Jun 25 | Aug 16 | May 22 | Sep 19 |
| 1978 | no data | Sep 26 | no data | Oct 13 |
"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.