Thurston County, Washington · Frost dates
Thurston County frost dates.
First-frost, last-frost, and growing-season length for Thurston County, Washington. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 8b
32°F — light freeze
Last spring frost
- 10%
- 05-15
- 20%
- 05-09
- 50%
- 04-29
- 80%
- 04-18
- 90%
- 04-11
First fall frost
- 10%
- 09-28
- 20%
- 10-03
- 50%
- 10-14
- 80%
- 10-26
- 90%
- 11-01
28°F — killing freeze
Last spring freeze
- 10%
- 04-29
- 20%
- 04-21
- 50%
- 04-05
- 80%
- 03-22
- 90%
- 03-12
First fall freeze
- 10%
- 10-09
- 20%
- 10-19
- 50%
- 11-01
- 80%
- 11-15
- 90%
- 11-24
Growing season length (days, 28°F threshold)
- Short year
- 163
- Median
- 210
- Long year
- 257
Source NOAA station
OLYMPIA AP, WA US
4.3 mi · 30 yrs of record (1991–2020) · 188 ft elev.
Data from OLYMPIA AP, WA US, 4.3 miles away with 30-year NOAA record (1991-2020).
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