Mercer County, Ohio · Frost dates
Mercer County frost dates.
First-frost, last-frost, and growing-season length for Mercer County, Ohio. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6a
32°F — light freeze
Last spring frost
- 10%
- 05-10
- 20%
- 05-06
- 50%
- 04-27
- 80%
- 04-17
- 90%
- 04-12
First fall frost
- 10%
- 10-03
- 20%
- 10-09
- 50%
- 10-19
- 80%
- 10-27
- 90%
- 11-01
28°F — killing freeze
Last spring freeze
- 10%
- 05-02
- 20%
- 04-25
- 50%
- 04-15
- 80%
- 04-05
- 90%
- 04-01
First fall freeze
- 10%
- 10-17
- 20%
- 10-22
- 50%
- 10-31
- 80%
- 11-07
- 90%
- 11-13
Growing season length (days, 28°F threshold)
- Short year
- 168
- Median
- 199
- Long year
- 226
Source NOAA station
CELINA 3 NE, OH US
5.5 mi · 30 yrs of record (1991–2020) · 866 ft elev.
Data from CELINA 3 NE, OH US, 5.5 miles away with 30-year NOAA record (1991-2020).
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