Grant County, Washington · Frost dates
Grant County frost dates.
First-frost, last-frost, and growing-season length for Grant County, Washington. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 8b
32°F — light freeze
Last spring frost
- 10%
- 05-06
- 20%
- 05-01
- 50%
- 04-22
- 80%
- 04-13
- 90%
- 04-08
First fall frost
- 10%
- 10-03
- 20%
- 10-08
- 50%
- 10-17
- 80%
- 10-24
- 90%
- 10-28
28°F — killing freeze
Last spring freeze
- 10%
- 04-25
- 20%
- 04-19
- 50%
- 04-06
- 80%
- 03-27
- 90%
- 03-19
First fall freeze
- 10%
- 10-14
- 20%
- 10-19
- 50%
- 10-27
- 80%
- 11-04
- 90%
- 11-10
Growing season length (days, 28°F threshold)
- Short year
- 172
- Median
- 204
- Long year
- 236
Source NOAA station
EPHRATA MUNI AP, WA US
6.9 mi · 30 yrs of record (1991–2020) · 1252 ft elev.
Data from EPHRATA MUNI AP, WA US, 6.9 miles away with 30-year NOAA record (1991-2020).
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