Sierra County, California · Frost dates
Sierra County frost dates.
First-frost, last-frost, and growing-season length for Sierra County, California. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 9b
32°F — light freeze
Last spring frost
- 10%
- 06-02
- 20%
- 05-28
- 50%
- 05-12
- 80%
- 04-27
- 90%
- 04-22
First fall frost
- 10%
- 10-10
- 20%
- 10-16
- 50%
- 10-29
- 80%
- 11-08
- 90%
- 11-13
28°F — killing freeze
Last spring freeze
- 10%
- 05-19
- 20%
- 05-10
- 50%
- 04-23
- 80%
- 04-10
- 90%
- 04-04
First fall freeze
- 10%
- 10-27
- 20%
- 11-02
- 50%
- 11-13
- 80%
- 11-24
- 90%
- 11-30
Growing season length (days, 28°F threshold)
- Short year
- 161
- Median
- 204
- Long year
- 240
Source NOAA station
BOWMAN DAM, CA US
11.1 mi · 30 yrs of record (1991–2020) · 5385 ft elev.
Data from BOWMAN DAM, CA US, 11.1 miles away with 30-year NOAA record (1991-2020).
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