Frost history / Cairo 3N, IL
Cairo 3N, IL: frost dates by year
Last spring and first fall frost at NOAA station USW00093809, 1951 to 2021, measured from daily minimum temperatures.
Elevation 313 ft, 37.042, -89.186. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Mar 24 | Nov 6 |
| Earliest | Feb 26 (1961) | Oct 7 (2000) |
| Latest | Apr 13 (1957) | Dec 4 (1978) |
| Trend | little change (less than half a day per decade) | 1.6 days earlier per decade |
| Years with data | 54 | 54 |
At 28°F (hard freeze) the median last spring date is Mar 12 and the median first fall date is Nov 17.
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 |
|---|---|---|---|---|
| 2021 | Mar 6 | Nov 4 | Feb 21 | Nov 4 |
| 2013 | Apr 6 | no data | Mar 28 | no data |
| 2012 | Mar 6 | Nov 1 | Feb 21 | Nov 13 |
| 2011 | Mar 11 | Nov 11 | Mar 2 | Nov 11 |
| 2010 | no data | Nov 7 | no data | Nov 7 |
| 2009 | Apr 8 | Oct 18 | Mar 5 | Dec 4 |
| 2008 | Mar 25 | Oct 28 | Mar 9 | Nov 10 |
| 2007 | Apr 10 | Nov 2 | Apr 10 | Nov 7 |
| 2006 | Mar 30 | Oct 24 | Mar 27 | Nov 2 |
| 2005 | Mar 19 | Oct 28 | Mar 17 | Nov 16 |
| 2004 | Mar 21 | Nov 24 | Mar 10 | Dec 2 |
| 2003 | Mar 31 | Nov 13 | Mar 10 | Nov 24 |
| 2002 | Mar 27 | Nov 1 | Mar 27 | Nov 17 |
| 2001 | Mar 28 | Oct 27 | Mar 27 | Oct 27 |
| 2000 | Apr 8 | Oct 7 | Mar 12 | Nov 14 |
| 1999 | Mar 27 | Oct 23 | Mar 4 | Nov 29 |
| 1998 | Mar 13 | Nov 6 | Mar 13 | Dec 8 |
| 1995 | Apr 2 | no data | Apr 2 | no data |
| 1990 | no data | Oct 26 | no data | Nov 29 |
| 1988 | no data | Oct 13 | no data | Nov 17 |
| 1987 | Apr 4 | no data | Mar 12 | no data |
| 1986 | Mar 22 | Nov 12 | Mar 22 | Nov 12 |
| 1985 | Mar 6 | Nov 20 | Feb 16 | Nov 21 |
| 1984 | Mar 14 | Nov 13 | Mar 9 | Nov 21 |
| 1983 | Mar 25 | Nov 29 | Feb 26 | Dec 15 |
| 1982 | Apr 7 | Nov 4 | Apr 6 | Nov 5 |
| 1981 | Mar 9 | Oct 23 | Feb 14 | Oct 24 |
| 1980 | Mar 18 | Oct 30 | Mar 6 | Nov 19 |
| 1979 | Mar 26 | Nov 11 | Mar 15 | Nov 29 |
| 1978 | Mar 18 | Dec 4 | Mar 5 | Dec 4 |
| 1977 | Feb 28 | Nov 25 | Feb 21 | Nov 25 |
| 1976 | Mar 17 | Nov 4 | Feb 7 | Nov 5 |
| 1975 | Mar 30 | Nov 13 | Mar 3 | Nov 14 |
| 1974 | Mar 25 | Nov 14 | Mar 25 | Dec 3 |
| 1973 | Feb 28 | Nov 9 | Feb 22 | Nov 9 |
| 1972 | Apr 8 | Nov 23 | Apr 8 | Dec 6 |
| 1971 | Mar 24 | Nov 7 | Mar 24 | Nov 7 |
| 1970 | Mar 17 | Nov 15 | Mar 15 | Nov 15 |
| 1969 | Mar 31 | Nov 13 | Mar 31 | Nov 14 |
| 1968 | Mar 24 | Nov 12 | Mar 23 | Nov 20 |
| 1967 | Mar 18 | Nov 4 | Mar 18 | Nov 5 |
| 1966 | Mar 27 | Nov 2 | Mar 24 | Nov 3 |
| 1965 | Mar 27 | Nov 29 | Mar 26 | Nov 29 |
| 1964 | Mar 30 | Nov 19 | Mar 30 | Nov 20 |
| 1963 | Mar 2 | Nov 24 | Feb 27 | Dec 10 |
| 1962 | Mar 17 | Nov 5 | Mar 6 | Dec 6 |
| 1961 | Feb 26 | Nov 7 | Feb 25 | Nov 29 |
| 1960 | Apr 10 | Nov 9 | Mar 25 | Nov 10 |
| 1959 | Mar 22 | Nov 6 | Mar 7 | Nov 6 |
| 1958 | Mar 21 | Nov 26 | Mar 18 | Nov 27 |
| 1957 | Apr 13 | Oct 28 | Mar 8 | Nov 30 |
| 1956 | Mar 20 | Nov 9 | Mar 8 | Nov 22 |
| 1955 | Mar 28 | Nov 3 | Mar 27 | Nov 17 |
| 1954 | Apr 1 | Nov 2 | Mar 15 | Nov 2 |
| 1953 | Mar 9 | Nov 6 | Feb 22 | Nov 28 |
| 1952 | Mar 23 | Oct 21 | Mar 6 | Nov 27 |
| 1951 | Mar 24 | Nov 2 | Mar 21 | 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.