Siskiyou County, California · Frost dates
Siskiyou County frost dates.
First-frost, last-frost, and growing-season length for Siskiyou County, California. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 9b
32°F — light freeze
Last spring frost
- 10%
- 05-20
- 20%
- 05-13
- 50%
- 04-30
- 80%
- 04-20
- 90%
- 04-14
First fall frost
- 10%
- 10-03
- 20%
- 10-08
- 50%
- 10-18
- 80%
- 10-27
- 90%
- 11-02
28°F — killing freeze
Last spring freeze
- 10%
- 05-03
- 20%
- 04-26
- 50%
- 04-12
- 80%
- 03-31
- 90%
- 03-22
First fall freeze
- 10%
- 10-17
- 20%
- 10-22
- 50%
- 11-01
- 80%
- 11-12
- 90%
- 11-20
Growing season length (days, 28°F threshold)
- Short year
- 167
- Median
- 203
- Long year
- 243
Source NOAA station
YREKA, CA US
9.7 mi · 30 yrs of record (1991–2020) · 2709 ft elev.
Data from YREKA, CA US, 9.7 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
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