Frost history / Jacobsville, MI
Jacobsville, MI: frost dates by year
Last spring and first fall frost at NOAA station USC00204161, 2009 to 2021, measured from daily minimum temperatures.
Elevation 650 ft, 47.008, -88.432. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 31 | Sep 30 |
| Earliest | May 17 (2010) | Sep 12 (2014) |
| Latest | Jun 18 (2013) | Oct 18 (2021) |
| Trend | 1.0 days earlier per decade | 14.1 days later per decade |
| Years with data | 12 | 13 |
At 28°F (hard freeze) the median last spring date is May 16 and the median first fall date is Oct 14.
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 |
|---|---|---|---|---|
| 2021 | May 31 | Oct 18 | May 30 | Oct 27 |
| 2020 | May 31 | Sep 18 | May 14 | Sep 18 |
| 2019 | Jun 3 | Oct 5 | May 13 | Oct 18 |
| 2018 | May 21 | Sep 30 | May 13 | Oct 13 |
| 2017 | May 21 | Sep 30 | May 19 | Oct 26 |
| 2016 | May 20 | Oct 9 | May 17 | Oct 14 |
| 2015 | Jun 6 | Sep 30 | Jun 3 | Oct 17 |
| 2014 | Jun 10 | Sep 12 | May 7 | Oct 11 |
| 2013 | Jun 18 | Sep 16 | May 24 | Oct 17 |
| 2012 | Jun 2 | Sep 27 | Apr 30 | Oct 12 |
| 2011 | May 28 | Sep 16 | May 28 | Oct 23 |
| 2010 | May 17 | Sep 15 | May 11 | Oct 3 |
| 2009 | no data | Oct 1 | no data | Oct 1 |
"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.