Anna 2 Nne, IL: frost dates by year

Last spring and first fall frost at NOAA station USC00110187, 1951 to 2025, measured from daily minimum temperatures.

Elevation 640 ft, 37.481, -89.234. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 10	Oct 26
Earliest	Mar 19 (1967)	Sep 23 (1995)
Latest	May 16 (1997)	Nov 26 (2024)
Trend	little change (less than half a day per decade)	little change (less than half a day per decade)
Years with data	62	64

At 28°F (hard freeze) the median last spring date is Mar 29 and the median first fall date is Nov 6.

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 9	Nov 3	Mar 21	Nov 10
2024	Apr 7	Nov 26	Mar 20	Nov 29
2023	Mar 30	Nov 1	Mar 21	Nov 1
2022	no data	Oct 18	no data	Oct 20
2012	no data	Oct 31	no data	Nov 1
2011	Apr 5	no data	Mar 11	no data
2010	Mar 30	Oct 29	Mar 7	Nov 6
2009	no data	Oct 18	no data	Nov 27
2008	Apr 29	no data	Apr 15	no data
2007	no data	Oct 29	no data	Nov 2
2006	Apr 10	Oct 13	Mar 26	Oct 14
2005	Apr 24	Oct 26	Mar 17	Oct 30
2004	Apr 14	Nov 5	Apr 3	Nov 25
2003	Apr 29	Oct 27	Apr 27	Nov 8
2002	Apr 7	Oct 14	Apr 5	Nov 2
2001	Apr 18	Oct 17	Apr 18	Oct 27
2000	Apr 22	Oct 8	Apr 9	Oct 9
1999	Mar 30	Oct 5	Mar 27	Oct 24
1998	Apr 11	Oct 23	Mar 22	Nov 7
1997	May 16	Oct 22	Apr 18	Oct 22
1996	Apr 16	Oct 19	Apr 10	Nov 2
1995	Apr 5	Sep 23	Apr 1	Oct 25
1994	Apr 7	Oct 27	Apr 7	Nov 23
1993	Apr 17	Oct 28	Mar 18	Nov 1
1992	Apr 5	Oct 19	Apr 3	Nov 14
1991	Mar 31	Oct 16	Mar 30	Nov 2
1990	Apr 12	Oct 29	Apr 7	Nov 30
1989	Apr 12	Oct 20	Apr 11	Nov 3
1988	Mar 30	Oct 13	Mar 19	Nov 21
1987	Apr 4	Oct 8	Apr 4	Oct 22
1986	Apr 23	Nov 10	Mar 22	Nov 13
1985	Apr 9	Nov 8	Mar 18	Nov 21
1984	Apr 1	Nov 2	Mar 12	Nov 13
1983	Apr 20	Nov 6	Apr 19	Nov 17
1982	Apr 10	Oct 22	Apr 10	Nov 4
1981	Mar 23	Oct 24	Mar 17	Oct 24
1980	Apr 14	Oct 26	Mar 14	Oct 26
1979	Apr 6	Oct 14	Apr 6	Nov 11
1978	Apr 22	Oct 27	Mar 18	Nov 29
1977	Mar 23	Oct 17	Mar 2	Nov 25
1976	Mar 22	Oct 17	Mar 17	Oct 28
1975	Apr 12	Nov 13	Apr 4	Nov 14
1974	Apr 9	Oct 3	Mar 26	Nov 14
1973	Apr 13	Nov 6	Apr 11	Nov 6
1972	Apr 9	Oct 19	Apr 9	Oct 20
1971	Apr 14	Nov 6	Mar 24	Nov 7
1970	Mar 30	Nov 4	Mar 17	Nov 16
1969	Mar 31	Oct 23	Mar 31	Oct 28
1968	Apr 6	Oct 25	Mar 24	Nov 10
1967	Mar 19	Oct 12	Mar 19	Nov 4
1966	May 10	Oct 28	Mar 28	Nov 2
1965	Mar 31	Oct 29	Mar 27	Nov 19
1964	Apr 9	Oct 10	Mar 30	Nov 20
1963	Apr 24	Nov 2	Mar 22	Nov 3
1962	Apr 16	Oct 24	Apr 3	Nov 5
1961	Apr 16	Oct 27	Apr 2	Nov 4
1960	Apr 10	Oct 20	Apr 10	Nov 7
1959	Mar 28	Oct 28	Mar 22	Nov 6
1958	Mar 22	Nov 7	Mar 21	Nov 27
1957	Apr 13	Oct 27	Apr 13	Nov 10
1956	Apr 24	Nov 8	Mar 30	Nov 9
1955	Mar 30	Oct 25	Mar 29	Nov 3
1954	May 4	Oct 30	Apr 1	Oct 30
1953	Apr 20	Nov 5	Apr 19	Nov 6
1952	Apr 6	Oct 7	Mar 26	Oct 7
1951	Apr 17	Nov 1	Apr 17	Nov 2

"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.