Lassen County, California · Frost dates
Lassen County frost dates.
First-frost, last-frost, and growing-season length for Lassen County, California. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 9b
32°F — light freeze
Last spring frost
- 10%
- 06-05
- 20%
- 05-31
- 50%
- 05-16
- 80%
- 05-03
- 90%
- 04-29
First fall frost
- 10%
- 09-25
- 20%
- 09-30
- 50%
- 10-08
- 80%
- 10-17
- 90%
- 10-22
28°F — killing freeze
Last spring freeze
- 10%
- 05-17
- 20%
- 05-08
- 50%
- 04-26
- 80%
- 04-12
- 90%
- 04-07
First fall freeze
- 10%
- 10-05
- 20%
- 10-09
- 50%
- 10-21
- 80%
- 10-31
- 90%
- 11-03
Growing season length (days, 28°F threshold)
- Short year
- 141
- Median
- 178
- Long year
- 210
Source NOAA station
SUSANVILLE 2SW, CA US
20.7 mi · 30 yrs of record (1991–2020) · 4212 ft elev.
Data from SUSANVILLE 2SW, CA US, 20.7 miles away with 30-year NOAA record (1991-2020).
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