Columbia County, Oregon · Frost dates
Columbia County frost dates.
First-frost, last-frost, and growing-season length for Columbia County, Oregon. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 8b
32°F — light freeze
Last spring frost
- 10%
- 05-29
- 20%
- 05-23
- 50%
- 05-08
- 80%
- 04-26
- 90%
- 04-18
First fall frost
- 10%
- 09-11
- 20%
- 09-18
- 50%
- 10-01
- 80%
- 10-18
- 90%
- 10-28
28°F — killing freeze
Last spring freeze
- 10%
- 05-07
- 20%
- 05-01
- 50%
- 04-12
- 80%
- 03-25
- 90%
- 03-14
First fall freeze
- 10%
- 09-28
- 20%
- 10-03
- 50%
- 10-21
- 80%
- 11-09
- 90%
- 11-19
Growing season length (days, 28°F threshold)
- Short year
- 144
- Median
- 192
- Long year
- 250
Source NOAA station
VERNONIA #2, OR US
7.5 mi · 30 yrs of record (1991–2020) · 625 ft elev.
Data from VERNONIA #2, OR US, 7.5 miles away with 30-year NOAA record (1991-2020).
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