Flint 7W, MI: frost dates by year

Last spring and first fall frost at NOAA station USC00202851, 2006 to 2025, measured from daily minimum temperatures.

Elevation 679 ft, 43.038, -83.769. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	May 9	Oct 17
Earliest	Apr 19 (2011)	Oct 1 (2009)
Latest	May 28 (2008)	Oct 26 (2025)
Trend	8.0 days earlier per decade	5.9 days later per decade
Years with data	20	19

At 28°F (hard freeze) the median last spring date is Apr 25 and the median first fall date is Nov 1.

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 9	Oct 26	Apr 17	Nov 2
2024	Apr 26	Oct 17	Apr 25	Oct 27
2023	Apr 27	Oct 23	Apr 25	Oct 31
2022	Apr 29	Oct 8	Apr 29	Oct 29
2021	May 13	Oct 24	May 1	Nov 3
2020	May 13	Oct 16	May 13	Oct 31
2019	Apr 24	Oct 15	Apr 2	Nov 6
2018	Apr 30	Oct 16	Apr 20	Oct 18
2017	May 9	Oct 26	May 9	Nov 8
2016	May 15	Oct 25	Apr 14	Nov 12
2015	Apr 28	Oct 17	Apr 26	Oct 18
2014	Apr 27	Oct 11	Apr 16	Nov 2
2013	May 13	Oct 24	Apr 21	Nov 3
2012	Apr 30	Oct 8	Apr 29	Nov 3
2011	Apr 19	Oct 22	Apr 19	Oct 28
2010	May 10	Oct 19	May 10	Nov 1
2009	May 18	Oct 1	Apr 16	Oct 11
2008	May 28	Oct 4	May 1	Oct 22
2007	May 14	Oct 14	Apr 17	Nov 2
2006	May 22	no data	Apr 27	no data

"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.