Piqua Wwtp, OH: frost dates by year

Last spring and first fall frost at NOAA station USC00336650, 2005 to 2025, measured from daily minimum temperatures.

Elevation 853 ft, 40.131, -84.234. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 19	Oct 25
Earliest	Apr 2 (2019)	Oct 15 (2006)
Latest	May 12 (2020)	Nov 10 (2016)
Trend	2.9 days later per decade	3.4 days later per decade
Years with data	18	16

At 28°F (hard freeze) the median last spring date is Apr 6 and the median first fall date is Nov 2.

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 13	Oct 24	Apr 12	Nov 10
2024	Apr 23	Nov 2	Mar 29	Nov 29
2023	Apr 25	Oct 31	Mar 31	Oct 31
2022	Apr 21	Oct 20	Apr 6	Nov 18
2021	Apr 23	Nov 3	Apr 5	Nov 3
2020	May 12	Oct 17	May 9	Nov 2
2019	Apr 2	Nov 1	Apr 1	Nov 1
2018	Apr 29	Oct 18	Apr 18	Nov 10
2017	Apr 9	Oct 26	Mar 23	Nov 10
2016	Apr 13	Nov 10	Apr 10	Nov 12
2015	Apr 28	Oct 17	Apr 24	Oct 18
2014	Apr 17	Oct 31	Apr 16	Nov 1
2013	Apr 26	Oct 22	Apr 21	Oct 25
2010	Apr 10	no data	Mar 27	no data
2009	Apr 12	Oct 18	Mar 21	Oct 18
2007	Apr 10	no data	Apr 10	no data
2006	Apr 9	Oct 15	Mar 27	Nov 2
2005	May 4	Oct 29	Mar 18	Nov 16

"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.