Humboldt County, California · Frost dates
Humboldt County frost dates.
First-frost, last-frost, and growing-season length for Humboldt County, California. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 9b
32°F — light freeze
Last spring frost
- 10%
- 03-23
- 20%
- 03-14
- 50%
- 02-22
- 80%
- 01-18
- 90%
- 12-31
First fall frost
- 10%
- 11-15
- 20%
- 11-21
- 50%
- 12-07
- 80%
- 12-27
- 90%
- 01-11
28°F — killing freeze
Last spring freeze
- 10%
- 02-08
- 20%
- 01-28
- 50%
- 01-03
- 80%
- 12-19
- 90%
- 12-11
First fall freeze
- 10%
- 12-03
- 20%
- 12-09
- 50%
- 12-25
- 80%
- 01-15
- 90%
- 01-29
Growing season length (days, 28°F threshold)
- Short year
- 298
- Median
- 356
- Long year
- 414
Source NOAA station
EUREKA WFO WOODLEY ISLAND, CA US
14.2 mi · 30 yrs of record (1991–2020) · 20 ft elev.
Data from EUREKA WFO WOODLEY ISLAND, CA US, 14.2 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
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