Frost history / Amasa 1W, MI
Amasa 1W, MI: frost dates by year
Last spring and first fall frost at NOAA station USC00200197, 1995 to 2025, measured from daily minimum temperatures.
Elevation 1,470 ft, 46.235, -88.454. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Jun 6 | Sep 15 |
| Earliest | May 25 (1995) | Aug 21 (2004) |
| Latest | Jul 19 (2000) | Oct 9 (2016) |
| Trend | 0.7 days later per decade | 4.2 days later per decade |
| Years with data | 22 | 18 |
At 28°F (hard freeze) the median last spring date is May 22 and the median first fall date is Oct 3.
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 |
|---|---|---|---|---|
| 2025 | Jun 13 | Oct 8 | Jun 1 | Oct 8 |
| 2024 | Jun 11 | Sep 23 | May 10 | Oct 4 |
| 2023 | Jun 8 | Aug 27 | May 25 | Oct 8 |
| 2022 | Jun 4 | Sep 23 | May 23 | Sep 23 |
| 2021 | May 30 | Sep 23 | May 29 | Oct 18 |
| 2020 | Jun 15 | Sep 10 | May 13 | Sep 18 |
| 2019 | Jun 3 | Oct 8 | Jun 3 | Oct 8 |
| 2018 | Jun 6 | Sep 6 | May 21 | Sep 22 |
| 2017 | Jun 1 | Sep 1 | May 19 | Oct 11 |
| 2016 | Jun 8 | Oct 9 | May 18 | Oct 9 |
| 2015 | Jun 6 | Sep 12 | May 22 | Sep 30 |
| 2014 | no data | Sep 12 | no data | Oct 6 |
| 2012 | Jun 1 | no data | Apr 29 | no data |
| 2010 | Jun 7 | no data | May 10 | no data |
| 2009 | Jun 6 | Sep 30 | May 31 | Sep 30 |
| 2008 | no data | Aug 25 | no data | Oct 3 |
| 2006 | Jun 11 | no data | May 22 | no data |
| 2004 | no data | Aug 21 | no data | Sep 29 |
| 2001 | Jun 1 | no data | May 13 | no data |
| 2000 | Jul 19 | no data | May 19 | no data |
| 1999 | May 26 | no data | May 9 | no data |
| 1998 | Jun 6 | Sep 22 | Jun 5 | Sep 23 |
| 1997 | May 27 | Sep 4 | May 22 | Oct 1 |
| 1996 | Jun 5 | Sep 19 | May 26 | Oct 3 |
| 1995 | May 25 | no data | May 9 | no data |
"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.