Tipton 2WNW, MI: frost dates by year

Last spring and first fall frost at NOAA station USC00208202, 2001 to 2022, measured from daily minimum temperatures.

Elevation 970 ft, 42.028, -84.111. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	May 2	Oct 14
Earliest	Apr 16 (2007)	Oct 2 (2003)
Latest	May 22 (2002)	Oct 28 (2007)
Trend	0.9 days earlier per decade	1.5 days later per decade
Years with data	16	15

At 28°F (hard freeze) the median last spring date is Apr 26 and the median first fall date is Oct 22.

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
2022	Apr 29	no data	Apr 28	no data
2021	May 11	no data	May 1	no data
2020	May 13	Oct 3	May 13	Oct 16
2019	Apr 28	Oct 15	Apr 2	Nov 2
2018	Apr 30	Oct 14	Apr 30	Oct 16
2016	no data	Oct 25	no data	Nov 12
2012	Apr 29	Oct 8	Apr 14	Oct 8
2011	Apr 21	Oct 22	Apr 6	Oct 30
2010	May 9	Oct 20	Apr 10	Oct 28
2009	May 18	no data	Apr 12	no data
2008	Apr 30	Oct 19	Apr 30	Oct 22
2007	Apr 16	Oct 28	Apr 14	Nov 19
2006	Apr 26	Oct 12	Apr 26	Oct 15
2005	May 5	Oct 26	May 4	Oct 29
2004	May 4	Oct 3	May 4	Nov 8
2003	May 4	Oct 2	Apr 24	Oct 18
2002	May 22	Oct 14	Apr 26	Oct 14
2001	no data	Oct 6	no data	Oct 8

"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.