Umatilla County, Oregon · Frost dates
Umatilla County frost dates.
First-frost, last-frost, and growing-season length for Umatilla County, Oregon. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 8b
32°F — light freeze
Last spring frost
- 10%
- 05-08
- 20%
- 05-02
- 50%
- 04-22
- 80%
- 04-10
- 90%
- 04-03
First fall frost
- 10%
- 09-27
- 20%
- 10-01
- 50%
- 10-09
- 80%
- 10-20
- 90%
- 10-26
28°F — killing freeze
Last spring freeze
- 10%
- 04-21
- 20%
- 04-14
- 50%
- 03-31
- 80%
- 03-17
- 90%
- 03-10
First fall freeze
- 10%
- 10-07
- 20%
- 10-12
- 50%
- 10-24
- 80%
- 11-04
- 90%
- 11-11
Growing season length (days, 28°F threshold)
- Short year
- 169
- Median
- 207
- Long year
- 246
Source NOAA station
PENDLETON DWTN, OR US
6.2 mi · 30 yrs of record (1991–2020) · 1040 ft elev.
Data from PENDLETON DWTN, OR US, 6.2 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
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