Okanogan County, Washington · Frost dates
Okanogan County frost dates.
First-frost, last-frost, and growing-season length for Okanogan County, Washington. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 8b
32°F — light freeze
Last spring frost
- 10%
- 05-15
- 20%
- 05-10
- 50%
- 04-30
- 80%
- 04-20
- 90%
- 04-14
First fall frost
- 10%
- 09-23
- 20%
- 09-29
- 50%
- 10-07
- 80%
- 10-17
- 90%
- 10-22
28°F — killing freeze
Last spring freeze
- 10%
- 05-02
- 20%
- 04-27
- 50%
- 04-14
- 80%
- 04-01
- 90%
- 03-26
First fall freeze
- 10%
- 10-03
- 20%
- 10-07
- 50%
- 10-19
- 80%
- 10-30
- 90%
- 11-04
Growing season length (days, 28°F threshold)
- Short year
- 154
- Median
- 188
- Long year
- 223
Source NOAA station
OMAK AP, WA US
12.0 mi · 30 yrs of record (1991–2020) · 1296 ft elev.
Data from OMAK AP, WA US, 12 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
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