Milan 4 Ese, MI: frost dates by year

Last spring and first fall frost at NOAA station USC00205450, 1984 to 2004, measured from daily minimum temperatures.

Elevation 670 ft, 42.066, -83.619. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	May 13	Oct 2
Earliest	Apr 18 (1991)	Aug 7 (1989)
Latest	Jun 3 (1999)	Oct 14 (2002)
Trend	8.8 days later per decade	9.0 days later per decade
Years with data	16	19

At 28°F (hard freeze) the median last spring date is Apr 24 and the median first fall date is Oct 6.

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
2004	May 4	Oct 3	May 4	Oct 5
2003	no data	Oct 2	no data	Oct 5
2002	May 22	Oct 14	Apr 7	Oct 14
2001	May 13	Oct 7	Apr 19	Oct 7
2000	May 27	no data	May 27	no data
1999	Jun 3	Oct 5	May 22	Oct 7
1998	no data	Oct 1	no data	Oct 1
1997	May 13	Sep 27	Apr 23	Sep 27
1996	May 13	Oct 3	Apr 27	Oct 4
1995	Apr 28	Sep 23	Apr 25	Sep 23
1994	May 27	Sep 5	Apr 24	Oct 10
1993	Apr 27	Sep 29	Apr 27	Oct 5
1992	May 27	Sep 29	Apr 29	Oct 13
1991	Apr 18	Sep 21	Apr 12	Sep 27
1990	May 2	Oct 13	Apr 19	Oct 26
1989	May 28	Aug 7	May 28	Aug 7
1988	Apr 25	Oct 6	Apr 21	Oct 6
1987	no data	Oct 3	no data	Oct 12
1986	May 4	Sep 8	Apr 23	Nov 3
1984	no data	Oct 2	no data	Nov 2

"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.