Frost history / Yale 1 Nnw, MI
Yale 1 Nnw, MI: frost dates by year
Last spring and first fall frost at NOAA station USC00209188, 2007 to 2020, measured from daily minimum temperatures.
Elevation 820 ft, 43.145, -82.801. Download the data (JSON) · NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 16 | Oct 15 |
| Earliest | Apr 30 (2011) | Sep 17 (2013) |
| Latest | May 29 (2008) | Oct 28 (2011) |
| Trend | 8.0 days earlier per decade | 2.8 days earlier per decade |
| Years with data | 10 | 12 |
At 28°F (hard freeze) the median last spring date is Apr 27 and the median first fall date is Oct 27.
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 |
|---|---|---|---|---|
| 2020 | May 14 | Oct 16 | May 14 | Oct 17 |
| 2018 | May 1 | Oct 16 | Apr 30 | Oct 16 |
| 2017 | May 10 | Oct 1 | May 10 | Oct 26 |
| 2016 | no data | Oct 10 | no data | Oct 26 |
| 2015 | May 23 | Oct 19 | Apr 26 | Nov 9 |
| 2014 | May 18 | Oct 11 | Apr 28 | Nov 2 |
| 2013 | no data | Sep 17 | no data | Oct 23 |
| 2011 | Apr 30 | Oct 28 | Apr 19 | Oct 29 |
| 2010 | May 11 | Oct 22 | Apr 24 | Nov 1 |
| 2009 | May 18 | Oct 1 | Apr 17 | Oct 11 |
| 2008 | May 29 | Oct 19 | May 1 | Oct 30 |
| 2007 | May 20 | Oct 14 | Apr 17 | Nov 2 |
"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 1991–2020 frost probabilities.