Saginaw #3, MI: frost dates by year

Last spring and first fall frost at NOAA station USC00207222, 2002 to 2025, measured from daily minimum temperatures.

Elevation 600 ft, 43.412, -83.956. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 29	Oct 18
Earliest	Apr 15 (2019)	Oct 2 (2003)
Latest	May 13 (2020)	Oct 27 (2016)
Trend	0.9 days earlier per decade	3.8 days later per decade
Years with data	22	24

At 28°F (hard freeze) the median last spring date is Apr 16 and the median first fall date is Nov 2.

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 21	Oct 26	Apr 21	Nov 10
2024	Apr 26	Oct 17	Apr 25	Nov 27
2023	Apr 27	Oct 23	Apr 3	Oct 31
2022	May 1	Oct 8	Apr 29	Nov 14
2021	May 1	Oct 24	Apr 22	Nov 4
2020	May 13	Oct 16	May 13	Oct 31
2019	Apr 15	Oct 15	Apr 2	Nov 6
2018	Apr 30	Oct 18	Apr 20	Oct 18
2017	May 8	Oct 26	Mar 24	Nov 8
2016	Apr 27	Oct 27	Apr 11	Nov 12
2015	Apr 25	Oct 18	Apr 24	Nov 23
2014	Apr 23	Oct 19	Apr 17	Nov 2
2013	May 13	Oct 24	Apr 22	Oct 25
2012	Apr 30	Oct 8	Mar 30	Nov 5
2011	Apr 19	Oct 22	Apr 2	Oct 28
2010	May 9	Oct 22	Apr 10	Nov 1
2009	Apr 23	Oct 11	Apr 13	Oct 11
2008	May 1	Oct 22	May 1	Oct 30
2007	Apr 16	Oct 13	Apr 16	Nov 19
2006	Apr 28	Oct 13	Apr 10	Nov 2
2005	no data	Oct 27	no data	Nov 11
2004	May 4	Oct 5	Apr 13	Oct 5
2003	May 4	Oct 2	Apr 24	Oct 2
2002	no data	Oct 14	no data	Oct 15

"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.