Robinson, IL: frost dates by year

Last spring and first fall frost at NOAA station USC00117345, 2001 to 2025, measured from daily minimum temperatures.

Elevation 535 ft, 39.006, -87.777. Download the data (JSON) · NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 15	Oct 20
Earliest	Mar 27 (2010)	Sep 30 (2003)
Latest	May 5 (2023)	Nov 3 (2021)
Trend	1.6 days later per decade	5.5 days later per decade
Years with data	21	22

At 28°F (hard freeze) the median last spring date is Mar 31 and the median first fall date is Oct 30.

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
2025	Apr 12	Oct 25	Apr 9	Nov 10
2024	Apr 7	Oct 17	Mar 28	Nov 26
2023	May 5	Oct 31	Mar 22	Oct 31
2022	Apr 20	Oct 14	Mar 29	Oct 21
2021	Apr 23	Nov 3	Apr 3	Nov 3
2020	Apr 19	Oct 5	Apr 16	Oct 16
2019	Apr 15	Nov 1	Apr 2	Nov 1
2018	Apr 29	Oct 18	Apr 17	Oct 28
2017	no data	Oct 29	no data	Nov 10
2014	Apr 17	no data	Mar 31	no data
2013	Apr 20	Oct 22	Apr 3	Oct 25
2012	Apr 13	Oct 8	Apr 11	Nov 1
2011	Apr 1	Oct 22	Apr 1	Nov 11
2010	Mar 27	Oct 22	Mar 7	Oct 29
2009	Apr 10	Oct 11	Mar 31	Nov 27
2008	Apr 16	Oct 28	Mar 24	Oct 28
2007	Apr 14	Oct 29	Apr 10	Nov 2
2006	Apr 10	Oct 12	Mar 26	Oct 15
2005	May 4	Oct 28	Mar 16	Oct 29
2004	Apr 14	Oct 3	Mar 23	Oct 17
2003	Apr 10	Sep 30	Mar 31	Nov 7
2002	Apr 29	Oct 14	Apr 5	Oct 14
2001	no data	Oct 6	no data	Oct 7

"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.