Columbia County, Washington · Frost dates
Columbia County frost dates.
First-frost, last-frost, and growing-season length for Columbia County, Washington. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 8b
32°F — light freeze
Last spring frost
- 10%
- 05-14
- 20%
- 05-08
- 50%
- 04-28
- 80%
- 04-17
- 90%
- 04-11
First fall frost
- 10%
- 09-30
- 20%
- 10-04
- 50%
- 10-13
- 80%
- 10-24
- 90%
- 10-29
28°F — killing freeze
Last spring freeze
- 10%
- 04-28
- 20%
- 04-20
- 50%
- 04-06
- 80%
- 03-23
- 90%
- 03-15
First fall freeze
- 10%
- 10-09
- 20%
- 10-14
- 50%
- 10-25
- 80%
- 11-05
- 90%
- 11-12
Growing season length (days, 28°F threshold)
- Short year
- 164
- Median
- 202
- Long year
- 242
Source NOAA station
DAYTON 1 WSW, WA US
4.6 mi · 30 yrs of record (1991–2020) · 1557 ft elev.
Data from DAYTON 1 WSW, WA US, 4.6 miles away with 30-year NOAA record (1991-2020).
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