Harney County, Oregon · Frost dates
Harney County frost dates.
First-frost, last-frost, and growing-season length for Harney County, Oregon. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 8b
32°F — light freeze
Last spring frost
- 10%
- 06-17
- 20%
- 06-12
- 50%
- 05-29
- 80%
- 05-12
- 90%
- 05-06
First fall frost
- 10%
- 09-02
- 20%
- 09-07
- 50%
- 09-18
- 80%
- 09-29
- 90%
- 10-03
28°F — killing freeze
Last spring freeze
- 10%
- 05-24
- 20%
- 05-15
- 50%
- 05-03
- 80%
- 04-24
- 90%
- 04-20
First fall freeze
- 10%
- 09-13
- 20%
- 09-21
- 50%
- 10-01
- 80%
- 10-12
- 90%
- 10-18
Growing season length (days, 28°F threshold)
- Short year
- 112
- Median
- 151
- Long year
- 181
Source NOAA station
MALHEUR REFUGE HQ, OR US
15.6 mi · 30 yrs of record (1991–2020) · 4118 ft elev.
Data from MALHEUR REFUGE HQ, OR US, 15.6 miles away with 30-year NOAA record (1991-2020).
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