Trinity County, California · Frost dates
Trinity County frost dates.
First-frost, last-frost, and growing-season length for Trinity County, California. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 9b
32°F — light freeze
Last spring frost
- 10%
- 05-03
- 20%
- 04-28
- 50%
- 04-16
- 80%
- 04-01
- 90%
- 03-23
First fall frost
- 10%
- 10-13
- 20%
- 10-18
- 50%
- 10-31
- 80%
- 11-17
- 90%
- 11-26
28°F — killing freeze
Last spring freeze
- 10%
- 04-16
- 20%
- 04-05
- 50%
- 03-17
- 80%
- 02-20
- 90%
- 02-02
First fall freeze
- 10%
- 10-24
- 20%
- 10-31
- 50%
- 11-19
- 80%
- 12-09
- 90%
- 12-20
Growing season length (days, 28°F threshold)
- Short year
- 191
- Median
- 247
- Long year
- 321
Source NOAA station
BIG BAR 4 E, CA US
8.1 mi · 30 yrs of record (1991–2020) · 1253 ft elev.
Data from BIG BAR 4 E, CA US, 8.1 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
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