San Luis Obispo County, California · Frost dates
San Luis Obispo County frost dates.
First-frost, last-frost, and growing-season length for San Luis Obispo County, California. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 9b
32°F — light freeze
Last spring frost
- 10%
- 02-26
- 20%
- 02-17
- 50%
- 01-16
- 80%
- 12-24
- 90%
- 12-11
First fall frost
- 10%
- 11-25
- 20%
- 12-04
- 50%
- 12-25
- 80%
- 01-26
- 90%
- 02-12
28°F — killing freeze
Last spring freeze
- 10%
- 02-22
- 20%
- 02-11
- 50%
- 01-09
- 80%
- 12-25
- 90%
- 12-17
First fall freeze
- 10%
- 12-14
- 20%
- 12-22
- 50%
- 01-06
- 80%
- 02-04
- 90%
- 02-17
Growing season length (days, 28°F threshold)
- Short year
- 295
- Median
- 362
- Long year
- 427
Source NOAA station
SAN LUIS OBISPO POLY, CA US
13.3 mi · 30 yrs of record (1991–2020) · 308 ft elev.
Data from SAN LUIS OBISPO POLY, CA US, 13.3 miles away with 30-year NOAA record (1991-2020).
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