Washington County, Oklahoma · Frost dates
Washington County frost dates.
First-frost, last-frost, and growing-season length for Washington County, Oklahoma. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 7a
32°F — light freeze
Last spring frost
- 10%
- 04-30
- 20%
- 04-23
- 50%
- 04-11
- 80%
- 04-01
- 90%
- 03-27
First fall frost
- 10%
- 10-08
- 20%
- 10-15
- 50%
- 10-24
- 80%
- 11-01
- 90%
- 11-06
28°F — killing freeze
Last spring freeze
- 10%
- 04-15
- 20%
- 04-10
- 50%
- 04-01
- 80%
- 03-21
- 90%
- 03-15
First fall freeze
- 10%
- 10-19
- 20%
- 10-24
- 50%
- 11-02
- 80%
- 11-10
- 90%
- 11-15
Growing season length (days, 28°F threshold)
- Short year
- 187
- Median
- 215
- Long year
- 245
Source NOAA station
BARTLESVILLE 3, OK US
7.1 mi · 30 yrs of record (1991–2020) · 715 ft elev.
Data from BARTLESVILLE 3, OK US, 7.1 miles away with 30-year NOAA record (1991-2020).
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