Frost history / Chillicothe Mound City, OH
Chillicothe Mound City, OH: frost dates by year
Last spring and first fall frost at NOAA station USC00331528, 1972 to 2003, measured from daily minimum temperatures.
Elevation 650 ft, 39.374, -83.004. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 25 | Oct 11 |
| Earliest | Apr 7 (1992) | Sep 23 (1974) |
| Latest | May 22 (2002) | Nov 8 (1985) |
| Trend | 2.9 days earlier per decade | little change (less than half a day per decade) |
| Years with data | 27 | 30 |
At 28°F (hard freeze) the median last spring date is Apr 14 and the median first fall date is Nov 1.
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 |
|---|---|---|---|---|
| 2003 | no data | Oct 3 | no data | Oct 24 |
| 2002 | May 22 | Oct 22 | Apr 8 | Nov 2 |
| 2001 | no data | Oct 7 | no data | Nov 6 |
| 2000 | Apr 14 | Oct 9 | Apr 9 | Nov 6 |
| 1999 | Apr 25 | Oct 21 | Mar 28 | Nov 4 |
| 1998 | Apr 12 | Oct 23 | Mar 25 | Nov 12 |
| 1997 | Apr 26 | Oct 21 | Apr 14 | Oct 22 |
| 1996 | May 14 | Nov 2 | Apr 10 | Nov 3 |
| 1995 | Apr 25 | Sep 23 | Apr 6 | Nov 4 |
| 1994 | May 2 | no data | Apr 9 | no data |
| 1993 | Apr 27 | Oct 10 | Mar 20 | Nov 2 |
| 1992 | Apr 7 | Oct 2 | Apr 6 | Oct 2 |
| 1991 | Apr 12 | Oct 6 | Apr 12 | Oct 6 |
| 1990 | Apr 20 | Oct 20 | Apr 20 | Oct 29 |
| 1989 | Apr 18 | Oct 9 | Apr 14 | Nov 4 |
| 1988 | Apr 21 | Oct 6 | Apr 20 | Oct 13 |
| 1987 | no data | Oct 4 | no data | Oct 22 |
| 1986 | Apr 24 | Oct 19 | Apr 23 | Nov 10 |
| 1985 | Apr 11 | Nov 8 | Apr 10 | Nov 21 |
| 1984 | Apr 25 | Nov 3 | Apr 11 | Nov 3 |
| 1983 | May 10 | Oct 27 | Apr 20 | Nov 13 |
| 1982 | Apr 28 | Oct 17 | Apr 23 | Oct 17 |
| 1981 | Apr 22 | Oct 3 | Apr 22 | Oct 20 |
| 1980 | May 9 | Oct 5 | Apr 17 | Oct 6 |
| 1979 | May 5 | Oct 13 | Apr 10 | Oct 26 |
| 1978 | May 3 | Oct 17 | Apr 16 | Nov 8 |
| 1977 | May 10 | Oct 7 | Apr 29 | Oct 17 |
| 1976 | May 9 | no data | Apr 14 | no data |
| 1975 | Apr 21 | Oct 30 | Apr 20 | Oct 31 |
| 1974 | May 7 | Sep 23 | Apr 25 | Oct 3 |
| 1973 | no data | Oct 22 | no data | Nov 4 |
| 1972 | no data | Oct 10 | no data | Oct 20 |
"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.