Milan Wwtp, MI: frost dates by year

Last spring and first fall frost at NOAA station USC00205451, 2005 to 2020, measured from daily minimum temperatures.

Elevation 680 ft, 42.081, -83.677. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 28	Oct 21
Earliest	Apr 3 (2019)	Oct 8 (2012)
Latest	May 13 (2020)	Nov 3 (2019)
Trend	1.2 days earlier per decade	5.4 days later per decade
Years with data	14	12

At 28°F (hard freeze) the median last spring date is Apr 14 and the median first fall date is Nov 3.

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
2020	May 13	no data	May 9	no data
2019	Apr 3	Nov 3	Apr 2	Nov 6
2018	Apr 30	Oct 16	Apr 20	Oct 18
2017	no data	Oct 26	no data	Nov 8
2015	Apr 24	no data	Apr 24	no data
2014	Apr 18	Oct 19	Apr 17	Nov 2
2013	May 13	Oct 22	Apr 21	Nov 12
2012	Apr 30	Oct 8	Apr 30	Nov 4
2011	Apr 21	Oct 22	Apr 4	Oct 30
2010	Apr 29	Nov 1	Apr 9	Nov 1
2009	Apr 24	Oct 11	Apr 12	Nov 6
2008	Apr 30	Oct 19	Apr 4	Oct 30
2007	Apr 15	Oct 28	Apr 11	Nov 19
2006	Apr 27	Oct 13	Apr 10	Oct 26
2005	May 6	no data	May 4	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.