Washington County, Ohio · Frost dates
Washington County frost dates.
First-frost, last-frost, and growing-season length for Washington County, Ohio. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6a
32°F — light freeze
Last spring frost
- 10%
- 05-04
- 20%
- 04-29
- 50%
- 04-18
- 80%
- 04-09
- 90%
- 04-05
First fall frost
- 10%
- 10-13
- 20%
- 10-17
- 50%
- 10-27
- 80%
- 11-03
- 90%
- 11-06
28°F — killing freeze
Last spring freeze
- 10%
- 04-19
- 20%
- 04-14
- 50%
- 04-05
- 80%
- 03-27
- 90%
- 03-22
First fall freeze
- 10%
- 10-24
- 20%
- 10-29
- 50%
- 11-05
- 80%
- 11-14
- 90%
- 11-19
Growing season length (days, 28°F threshold)
- Short year
- 188
- Median
- 214
- Long year
- 242
Source NOAA station
MARIETTA WWTP, OH US
4.2 mi · 30 yrs of record (1991–2020) · 610 ft elev.
Data from MARIETTA WWTP, OH US, 4.2 miles away with 30-year NOAA record (1991-2020).
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