Frost history / Saline 4SW, MI
Saline 4SW, MI: frost dates by year
Last spring and first fall frost at NOAA station USC00207312, 2002 to 2025, measured from daily minimum temperatures.
Elevation 840 ft, 42.124, -83.820. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 30 | Oct 17 |
| Earliest | Apr 15 (2016) | Sep 19 (2012) |
| Latest | May 30 (2021) | Oct 26 (2017) |
| Trend | 2.4 days earlier per decade | 7.6 days later per decade |
| Years with data | 18 | 18 |
At 28°F (hard freeze) the median last spring date is Apr 26 and the median first fall date is Nov 2.
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 | Apr 17 | Oct 25 | Apr 12 | Nov 2 |
| 2024 | Apr 25 | Oct 17 | Apr 25 | Nov 29 |
| 2023 | Apr 26 | Oct 23 | Apr 25 | Oct 31 |
| 2022 | Apr 29 | Oct 8 | Apr 29 | Nov 17 |
| 2021 | May 30 | Oct 24 | May 1 | Nov 3 |
| 2020 | May 13 | Oct 16 | May 13 | Oct 31 |
| 2019 | Apr 15 | Oct 18 | Apr 1 | Nov 6 |
| 2018 | Apr 30 | Oct 16 | Apr 18 | Oct 18 |
| 2017 | May 8 | Oct 26 | May 8 | Nov 8 |
| 2016 | Apr 15 | Oct 25 | Apr 11 | Nov 12 |
| 2015 | no data | Oct 17 | no data | Oct 18 |
| 2014 | May 18 | Oct 19 | May 16 | Nov 2 |
| 2012 | May 1 | Sep 19 | Apr 29 | Oct 8 |
| 2011 | Apr 22 | no data | Apr 19 | no data |
| 2010 | May 10 | Oct 19 | Apr 28 | Oct 22 |
| 2009 | May 18 | Oct 1 | Apr 23 | Oct 11 |
| 2005 | May 5 | no data | May 4 | no data |
| 2004 | May 5 | Oct 3 | May 4 | Nov 8 |
| 2003 | Apr 23 | Oct 2 | Apr 13 | Nov 7 |
| 2002 | no data | Oct 14 | no data | Oct 17 |
"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.