Union County, Oregon · Frost dates
Union County frost dates.
First-frost, last-frost, and growing-season length for Union County, Oregon. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 8b
32°F — light freeze
Last spring frost
- 10%
- 05-26
- 20%
- 05-17
- 50%
- 05-06
- 80%
- 04-27
- 90%
- 04-21
First fall frost
- 10%
- 09-17
- 20%
- 09-22
- 50%
- 10-01
- 80%
- 10-11
- 90%
- 10-16
28°F — killing freeze
Last spring freeze
- 10%
- 05-05
- 20%
- 04-30
- 50%
- 04-19
- 80%
- 04-07
- 90%
- 04-01
First fall freeze
- 10%
- 09-30
- 20%
- 10-03
- 50%
- 10-14
- 80%
- 10-24
- 90%
- 10-29
Growing season length (days, 28°F threshold)
- Short year
- 148
- Median
- 178
- Long year
- 211
Source NOAA station
LA GRANDE, OR US
3.8 mi · 30 yrs of record (1991–2020) · 2755 ft elev.
Data from LA GRANDE, OR US, 3.8 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
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