Farmington, MI: frost dates by year

Last spring and first fall frost at NOAA station USC00202691, 2005 to 2025, measured from daily minimum temperatures.

Elevation 720 ft, 42.467, -83.362. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 30	Oct 19
Earliest	Apr 15 (2019)	Oct 8 (2012)
Latest	May 18 (2023)	Nov 2 (2025)
Trend	2.3 days later per decade	0.6 days later per decade
Years with data	21	21

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	Apr 18	Nov 2	Apr 17	Nov 10
2024	Apr 26	Oct 18	Apr 25	Nov 27
2023	May 18	Oct 23	Apr 26	Oct 31
2022	Apr 30	Oct 8	Apr 29	Oct 21
2021	May 10	Oct 24	May 1	Nov 3
2020	May 14	Oct 16	May 13	Oct 17
2019	Apr 15	Oct 15	Apr 2	Nov 6
2018	Apr 30	Oct 16	Apr 29	Oct 16
2017	May 9	Oct 26	Mar 29	Nov 8
2016	May 16	Oct 25	Apr 11	Nov 12
2015	Apr 28	Oct 17	Apr 25	Oct 18
2014	Apr 27	Oct 12	Apr 17	Nov 2
2013	May 13	Oct 22	May 13	Oct 28
2012	Apr 30	Oct 8	Apr 30	Oct 8
2011	Apr 20	Oct 22	Apr 4	Oct 30
2010	May 9	Oct 22	Apr 11	Nov 1
2009	Apr 23	Oct 11	Apr 13	Nov 6
2008	May 1	Oct 19	May 1	Oct 30
2007	Apr 16	Oct 29	Apr 15	Nov 2
2006	Apr 28	Oct 13	Apr 10	Oct 27
2005	May 5	Oct 27	May 4	Nov 11

"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.