Athens Ou, OH: frost dates by year

Last spring and first fall frost at NOAA station USC00330279, 1988 to 2011, measured from daily minimum temperatures.

Elevation 684 ft, 39.322, -82.099. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 28	Oct 19
Earliest	Apr 6 (2011)	Sep 7 (1988)
Latest	May 31 (1990)	Nov 9 (2004)
Trend	16.5 days earlier per decade	16.2 days later per decade
Years with data	17	18

At 28°F (hard freeze) the median last spring date is Apr 13 and the median first fall date is Oct 27.

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
2011	Apr 6	Oct 28	Apr 4	Nov 18
2010	May 11	Oct 23	Mar 28	Nov 1
2009	Apr 13	Oct 18	Apr 13	Nov 6
2008	Apr 17	Oct 19	Apr 16	Oct 22
2007	Apr 11	Oct 29	Apr 11	Oct 29
2006	Apr 11	Oct 13	Apr 10	Nov 3
2005	May 5	Oct 26	Mar 23	Oct 29
2004	May 5	Nov 9	Apr 7	Nov 9
2003	Apr 28	Oct 3	Apr 1	Oct 24
2002	May 23	Oct 23	Apr 8	Nov 2
2001	Apr 30	Oct 7	Apr 19	Oct 8
2000	Apr 28	no data	Apr 14	no data
1999	Apr 27	Oct 21	Apr 26	Oct 25
1998	Apr 29	Oct 23	Apr 13	Oct 23
1997	no data	Oct 16	no data	Oct 21
1996	May 15	no data	Apr 18	no data
1995	Apr 27	Sep 23	Apr 25	Oct 17
1994	no data	Oct 10	no data	Oct 28
1990	May 31	no data	Apr 22	no data
1989	no data	Sep 24	no data	Sep 24
1988	no data	Sep 7	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.