Dundee, MI: frost dates by year

Last spring and first fall frost at NOAA station USC00202308, 2004 to 2025, measured from daily minimum temperatures.

Elevation 660 ft, 41.955, -83.649. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 27	Oct 21
Earliest	Apr 2 (2019)	Oct 5 (2004)
Latest	May 14 (2020)	Nov 6 (2019)
Trend	little change (less than half a day per decade)	4.1 days later per decade
Years with data	19	18

At 28°F (hard freeze) the median last spring date is Apr 11 and the median first fall date is Nov 5.

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 10
2024	Apr 26	no data	Apr 25	no data
2023	Apr 27	Oct 23	Apr 3	Oct 31
2021	May 2	no data	Apr 23	no data
2020	May 14	Oct 16	May 9	Oct 31
2019	Apr 2	Nov 6	Apr 2	Nov 6
2018	Apr 29	Oct 16	Apr 20	Oct 18
2017	May 8	Oct 26	Mar 24	Nov 9
2016	Apr 15	Oct 26	Apr 10	Nov 12
2015	Apr 29	Oct 17	Apr 25	Nov 9
2014	Apr 18	Oct 12	Apr 17	Nov 2
2013	May 14	Oct 23	Apr 21	Oct 25
2012	Apr 29	Oct 8	Mar 28	Nov 5
2011	Apr 19	Oct 22	Apr 3	Oct 30
2009	Apr 17	Oct 10	Apr 12	Nov 5
2008	Apr 30	Oct 20	Apr 3	Oct 30
2007	Apr 15	Oct 28	Apr 11	Nov 19
2006	Apr 27	Oct 15	Apr 10	Oct 26
2005	May 5	Oct 29	Mar 27	Nov 17
2004	no data	Oct 5	no data	Nov 9

"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.