Marin County, California · Frost dates
Marin County frost dates.
First-frost, last-frost, and growing-season length for Marin County, California. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 9b
32°F — light freeze
Last spring frost
- 10%
- 02-25
- 20%
- 02-14
- 50%
- 01-11
- 80%
- 12-23
- 90%
- 12-14
First fall frost
- 10%
- 12-02
- 20%
- 12-08
- 50%
- 12-21
- 80%
- 01-12
- 90%
- 02-09
28°F — killing freeze
Last spring freeze
- 10%
- 02-21
- 20%
- 02-10
- 50%
- 12-31
- 80%
- 12-18
- 90%
- 12-11
First fall freeze
- 10%
- 12-07
- 20%
- 12-14
- 50%
- 12-29
- 80%
- 02-03
- 90%
- 02-18
Growing season length (days, 28°F threshold)
- Short year
- 289
- Median
- 363
- Long year
- 434
Source NOAA station
SAN RAFAEL CIVIC CTR, CA US
12.0 mi · 30 yrs of record (1991–2020) · 120 ft elev.
Data from SAN RAFAEL CIVIC CTR, CA US, 12 miles away with 30-year NOAA record (1991-2020).
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