Morrow County, Oregon · Frost dates
Morrow County frost dates.
First-frost, last-frost, and growing-season length for Morrow County, Oregon. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 8b
32°F — light freeze
Last spring frost
- 10%
- 05-11
- 20%
- 05-05
- 50%
- 04-26
- 80%
- 04-14
- 90%
- 04-06
First fall frost
- 10%
- 10-03
- 20%
- 10-08
- 50%
- 10-19
- 80%
- 10-29
- 90%
- 11-02
28°F — killing freeze
Last spring freeze
- 10%
- 04-24
- 20%
- 04-17
- 50%
- 04-02
- 80%
- 03-17
- 90%
- 03-09
First fall freeze
- 10%
- 10-15
- 20%
- 10-21
- 50%
- 11-01
- 80%
- 11-14
- 90%
- 11-20
Growing season length (days, 28°F threshold)
- Short year
- 174
- Median
- 213
- Long year
- 256
Source NOAA station
HEPPNER, OR US
4.6 mi · 30 yrs of record (1991–2020) · 1885 ft elev.
Data from HEPPNER, OR US, 4.6 miles away with 30-year NOAA record (1991-2020).
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