Frost history / Channahon Dresden Isl Dam, IL

Channahon Dresden Isl Dam, IL: frost dates by year

Last spring and first fall frost at NOAA station USC00111420, 1997 to 2012, measured from daily minimum temperatures.

Elevation 505 ft, 41.398, -88.282. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 20	Oct 15
Earliest	Apr 10 (2006)	Oct 2 (2003)
Latest	May 21 (2002)	Nov 11 (2011)
Trend	3.1 days earlier per decade	6.8 days later per decade
Years with data	14	15

At 28°F (hard freeze) the median last spring date is Apr 5 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
2012	Apr 13	Oct 8	Mar 11	Nov 5
2011	Apr 22	Nov 11	Apr 1	Nov 11
2010	Apr 29	Oct 29	Mar 27	Nov 5
2008	Apr 16	Oct 28	Apr 3	Oct 28
2007	Apr 11	Oct 29	Apr 8	Nov 8
2006	Apr 10	Oct 12	Apr 10	Nov 1
2005	May 4	Oct 23	Mar 29	Nov 16
2004	May 7	Oct 5	Apr 9	Nov 25
2003	Apr 24	Oct 2	Apr 12	Nov 7
2002	May 21	Oct 14	Apr 7	Oct 20
2001	Apr 19	Oct 7	Apr 19	Oct 28
2000	Apr 23	Oct 7	Apr 12	Oct 9
1999	Apr 19	Oct 19	Mar 28	Oct 24
1998	Apr 11	Nov 7	Mar 25	Nov 7
1997	no data	Oct 15	no data	Oct 28

"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.