Frost history / Greenland 6N, MI
Greenland 6N, MI: frost dates by year
Last spring and first fall frost at NOAA station USC00203421, 2011 to 2024, measured from daily minimum temperatures.
Elevation 791 ft, 46.874, -89.101. Download the data (JSON) · NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 28 | Sep 29 |
| Earliest | May 15 (2024) | Sep 12 (2014) |
| Latest | Jun 13 (2020) | Oct 14 (2016) |
| Trend | 3.9 days earlier per decade | 13.6 days later per decade |
| Years with data | 14 | 14 |
At 28°F (hard freeze) the median last spring date is May 6 and the median first fall date is Oct 25.
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 |
|---|---|---|---|---|
| 2024 | May 15 | Oct 8 | Apr 26 | Oct 9 |
| 2023 | May 26 | Oct 8 | Apr 27 | Oct 30 |
| 2022 | May 24 | Sep 23 | May 5 | Oct 10 |
| 2021 | May 30 | Sep 28 | May 10 | Sep 28 |
| 2020 | Jun 13 | Sep 18 | May 13 | Oct 27 |
| 2019 | Jun 3 | Oct 13 | May 7 | Oct 25 |
| 2018 | May 21 | Oct 13 | May 11 | Oct 13 |
| 2017 | May 21 | Oct 1 | May 9 | Oct 26 |
| 2016 | Jun 8 | Oct 14 | May 5 | Oct 25 |
| 2015 | Jun 2 | Sep 30 | Apr 30 | Oct 2 |
| 2014 | May 17 | Sep 12 | Apr 27 | Nov 1 |
| 2013 | Jun 4 | Sep 16 | May 14 | Oct 28 |
| 2012 | May 31 | Sep 19 | Apr 29 | Oct 12 |
| 2011 | May 27 | Sep 16 | May 27 | Oct 28 |
"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.