Casey, IL: frost dates by year

Last spring and first fall frost at NOAA station USC00111329, 1980 to 2025, measured from daily minimum temperatures.

Elevation 620 ft, 39.297, -87.975. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 20	Oct 18
Earliest	Mar 23 (2017)	Sep 23 (1983)
Latest	May 12 (1981)	Nov 12 (2016)
Trend	little change (less than half a day per decade)	2.7 days later per decade
Years with data	20	19

At 28°F (hard freeze) the median last spring date is Apr 9 and the median first fall date is Oct 24.

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 23	Apr 12	Oct 24
2024	Apr 25	Oct 16	Apr 6	Oct 17
2023	Apr 25	Oct 31	Apr 24	Oct 31
2022	Apr 19	Oct 8	Apr 2	Oct 19
2021	Apr 22	Nov 3	Apr 3	Nov 3
2020	May 9	Oct 5	Apr 18	Oct 16
2019	Apr 15	Oct 12	Apr 2	Nov 1
2018	Apr 29	Oct 18	Apr 17	Oct 21
2017	Mar 23	Oct 31	Mar 20	Nov 10
2016	Apr 10	Nov 12	Apr 9	Nov 13
2015	Apr 24	Oct 18	Mar 29	Oct 18
1990	Apr 18	no data	Apr 12	no data
1989	May 7	Oct 19	Apr 10	Nov 3
1988	Mar 30	Oct 12	Mar 19	Oct 30
1987	Apr 10	Oct 8	Apr 9	Oct 12
1985	Apr 10	no data	Apr 9	no data
1984	Apr 7	Nov 2	Mar 13	Nov 11
1983	May 9	Sep 23	Apr 20	Nov 12
1982	Apr 21	Oct 21	Apr 11	Oct 21
1981	May 12	Oct 3	Apr 6	Oct 23
1980	no data	Oct 5	no data	Oct 5

"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.