Whatcom County, Washington · Frost dates
Whatcom County frost dates.
First-frost, last-frost, and growing-season length for Whatcom County, Washington. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 8b
32°F — light freeze
Last spring frost
- 10%
- 05-09
- 20%
- 05-04
- 50%
- 04-24
- 80%
- 04-11
- 90%
- 04-04
First fall frost
- 10%
- 10-12
- 20%
- 10-18
- 50%
- 10-29
- 80%
- 11-10
- 90%
- 11-17
28°F — killing freeze
Last spring freeze
- 10%
- 04-17
- 20%
- 04-10
- 50%
- 03-28
- 80%
- 03-12
- 90%
- 03-05
First fall freeze
- 10%
- 10-23
- 20%
- 11-01
- 50%
- 11-17
- 80%
- 12-01
- 90%
- 12-06
Growing season length (days, 28°F threshold)
- Short year
- 189
- Median
- 234
- Long year
- 276
Source NOAA station
UPPER BAKER DAM, WA US
14.7 mi · 30 yrs of record (1991–2020) · 690 ft elev.
Data from UPPER BAKER DAM, WA US, 14.7 miles away with 30-year NOAA record (1991-2020).
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