Streamwood, IL: frost dates by year

Last spring and first fall frost at NOAA station USC00118324, 1994 to 2011, measured from daily minimum temperatures.

Elevation 819 ft, 42.026, -88.178. Download the data (JSON) · NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	May 4	Oct 9
Earliest	Apr 17 (2007)	Sep 23 (1995)
Latest	May 31 (2001)	Oct 28 (2007)
Trend	4.5 days earlier per decade	6.8 days later per decade
Years with data	16	17

At 28°F (hard freeze) the median last spring date is Apr 24 and the median first fall date is Oct 14.

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
2011	Apr 29	no data	Apr 21	no data
2010	May 9	Oct 5	Apr 28	Oct 22
2009	May 17	Oct 10	Apr 22	Oct 10
2008	May 19	Oct 21	Apr 30	Oct 28
2007	Apr 17	Oct 28	Apr 16	Oct 28
2006	no data	Oct 9	no data	Oct 9
2005	May 5	Oct 23	May 4	Oct 23
2004	May 4	Oct 2	May 3	Oct 5
2003	Apr 24	Oct 1	Apr 23	Oct 2
2002	May 27	Oct 14	May 27	Oct 14
2001	May 31	Oct 6	Apr 19	Oct 6
2000	Apr 26	Oct 7	Apr 23	Oct 7
1999	Apr 25	Oct 3	Apr 25	Oct 18
1998	Apr 29	Oct 14	Apr 18	Oct 22
1997	May 22	Oct 14	Apr 22	Oct 15
1996	May 30	Oct 4	Apr 27	Oct 11
1995	May 3	Sep 23	Apr 24	Sep 23
1994	no data	Oct 10	no data	Nov 11

"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 1991–2020 frost probabilities.