Frost history / Big Bay 1NW, MI
Big Bay 1NW, MI: frost dates by year
Last spring and first fall frost at NOAA station USC00200770, 1966 to 2025, measured from daily minimum temperatures.
Elevation 765 ft, 46.833, -87.750. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 24 | Oct 8 |
| Earliest | May 7 (2022) | Sep 2 (1976) |
| Latest | Jun 17 (1972) | Nov 1 (1971) |
| Trend | 0.8 days earlier per decade | 1.3 days later per decade |
| Years with data | 38 | 37 |
At 28°F (hard freeze) the median last spring date is May 12 and the median first fall date is Oct 19.
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 | May 31 | Oct 25 | May 9 | Oct 25 |
| 2024 | May 15 | Oct 18 | Apr 26 | Nov 2 |
| 2023 | May 25 | Oct 29 | Apr 24 | Oct 30 |
| 2022 | May 7 | Sep 23 | Apr 29 | Oct 10 |
| 2021 | May 29 | Oct 27 | May 29 | Nov 5 |
| 2020 | May 16 | Oct 16 | May 13 | Oct 17 |
| 2019 | May 13 | Oct 12 | May 8 | Oct 25 |
| 2018 | May 20 | Sep 30 | May 12 | Oct 13 |
| 2017 | May 20 | Oct 11 | May 20 | Oct 26 |
| 2016 | May 18 | Oct 14 | May 9 | Nov 12 |
| 2015 | Jun 1 | Sep 30 | Jun 1 | Oct 26 |
| 2014 | May 17 | Oct 6 | May 6 | Oct 6 |
| 2013 | Jun 4 | Oct 17 | May 24 | Oct 29 |
| 2012 | no data | Sep 27 | no data | Oct 28 |
| 2011 | May 28 | Sep 16 | May 27 | Nov 3 |
| 2010 | May 10 | Oct 30 | May 10 | Nov 2 |
| 2009 | Jun 6 | Oct 1 | May 11 | Oct 1 |
| 2008 | no data | Oct 17 | no data | Oct 18 |
| 1992 | May 26 | no data | May 26 | no data |
| 1991 | May 20 | Sep 20 | May 19 | Sep 28 |
| 1990 | no data | Oct 8 | no data | Oct 8 |
| 1989 | no data | Sep 23 | no data | Sep 23 |
| 1988 | Jun 3 | no data | May 25 | no data |
| 1987 | May 15 | no data | May 12 | no data |
| 1986 | May 20 | Oct 5 | Apr 22 | Oct 10 |
| 1984 | May 28 | Sep 26 | May 28 | Oct 29 |
| 1983 | May 28 | Oct 9 | May 17 | Oct 19 |
| 1982 | Jun 3 | no data | May 22 | no data |
| 1981 | May 31 | Sep 21 | May 19 | Sep 23 |
| 1980 | Jun 10 | Sep 28 | Apr 28 | Oct 9 |
| 1979 | May 26 | Oct 5 | May 16 | Oct 18 |
| 1978 | May 21 | Oct 14 | May 7 | Oct 15 |
| 1977 | May 10 | Oct 7 | May 10 | Oct 23 |
| 1976 | May 24 | Sep 2 | May 6 | Oct 8 |
| 1975 | May 16 | Sep 25 | May 12 | Oct 18 |
| 1972 | Jun 17 | no data | May 8 | no data |
| 1971 | Jun 1 | Nov 1 | May 7 | Nov 1 |
| 1970 | May 28 | Oct 11 | May 6 | Oct 17 |
| 1969 | May 26 | Oct 19 | May 26 | Oct 22 |
| 1968 | May 18 | Oct 21 | May 10 | Oct 30 |
| 1967 | May 22 | Sep 29 | May 22 | Oct 12 |
| 1966 | May 13 | Oct 13 | May 13 | Oct 30 |
"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.