Glennie 2SE, MI: frost dates by year

Last spring and first fall frost at NOAA station USC00203188, 2006 to 2025, measured from daily minimum temperatures.

Elevation 894 ft, 44.536, -83.702. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	May 20	Oct 2
Earliest	Apr 27 (2024)	Sep 10 (2006)
Latest	Jun 4 (2009)	Oct 26 (2017)
Trend	3.3 days earlier per decade	13.8 days later per decade
Years with data	19	20

At 28°F (hard freeze) the median last spring date is May 8 and the median first fall date is Oct 16.

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 20	Oct 9	May 4	Oct 26
2024	Apr 27	Oct 5	Apr 26	Oct 17
2023	May 27	Oct 18	May 18	Oct 23
2022	May 24	Sep 29	May 8	Oct 3
2021	May 30	Oct 22	May 9	Oct 24
2020	May 14	Sep 19	May 13	Oct 16
2019	May 12	Oct 5	May 8	Oct 15
2018	May 14	Oct 14	May 1	Oct 16
2017	May 12	Oct 26	May 9	Oct 27
2016	May 23	Oct 9	Apr 28	Oct 26
2015	May 23	Oct 8	May 23	Oct 17
2014	May 18	Sep 19	May 6	Oct 9
2013	Jun 3	Sep 13	Apr 27	Oct 22
2012	May 17	Sep 19	Apr 29	Oct 7
2011	Apr 30	Sep 16	Apr 24	Oct 22
2010	May 11	Sep 19	May 10	Oct 4
2009	Jun 4	Oct 1	May 18	Oct 11
2008	May 29	Oct 3	May 25	Oct 4
2007	May 21	Sep 16	May 13	Oct 13
2006	no data	Sep 10	no data	Oct 7

"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.