Neoga 4NW, IL: frost dates by year

Last spring and first fall frost at NOAA station USC00116025, 2006 to 2018, measured from daily minimum temperatures.

Elevation 643 ft, 39.354, -88.500. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 13	Oct 17
Earliest	Apr 7 (2011)	Sep 24 (2012)
Latest	Apr 29 (2018)	Nov 10 (2016)
Trend	6.9 days later per decade	8.0 days later per decade
Years with data	13	13

At 28°F (hard freeze) the median last spring date is Mar 31 and the median first fall date is Oct 29.

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
2018	Apr 29	Oct 13	Apr 29	Oct 21
2017	Apr 8	Oct 29	Apr 8	Oct 29
2016	Apr 12	Nov 10	Apr 9	Nov 13
2015	Apr 24	Oct 17	Mar 29	Oct 18
2014	Apr 16	Oct 30	Mar 31	Nov 2
2013	Apr 21	Oct 22	Apr 4	Oct 22
2012	Apr 13	Sep 24	Apr 12	Nov 4
2011	Apr 7	Oct 2	Mar 27	Nov 11
2010	Apr 10	Oct 5	Mar 27	Oct 29
2009	Apr 12	Oct 11	Mar 30	Oct 18
2008	Apr 16	Oct 28	Mar 20	Oct 28
2007	Apr 15	Oct 29	Apr 10	Nov 7
2006	Apr 10	Oct 12	Mar 26	Oct 13

"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.