Benton County, Washington · Frost dates
Benton County frost dates.
First-frost, last-frost, and growing-season length for Benton County, Washington. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 8b
32°F — light freeze
Last spring frost
- 10%
- 05-07
- 20%
- 05-01
- 50%
- 04-14
- 80%
- 03-31
- 90%
- 03-24
First fall frost
- 10%
- 10-05
- 20%
- 10-11
- 50%
- 10-22
- 80%
- 11-01
- 90%
- 11-07
28°F — killing freeze
Last spring freeze
- 10%
- 04-22
- 20%
- 04-09
- 50%
- 03-23
- 80%
- 03-07
- 90%
- 03-02
First fall freeze
- 10%
- 10-18
- 20%
- 10-22
- 50%
- 11-02
- 80%
- 11-13
- 90%
- 11-20
Growing season length (days, 28°F threshold)
- Short year
- 179
- Median
- 224
- Long year
- 263
Source NOAA station
PROSSER, WA US
11.7 mi · 30 yrs of record (1991–2020) · 830 ft elev.
Data from PROSSER, WA US, 11.7 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
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