Polk County, Oregon · Frost dates
Polk County frost dates.
First-frost, last-frost, and growing-season length for Polk County, Oregon. 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%
- 04-18
- 80%
- 04-02
- 90%
- 03-27
First fall frost
- 10%
- 10-21
- 20%
- 10-27
- 50%
- 11-07
- 80%
- 11-18
- 90%
- 11-24
28°F — killing freeze
Last spring freeze
- 10%
- 04-05
- 20%
- 03-29
- 50%
- 03-13
- 80%
- 02-25
- 90%
- 02-15
First fall freeze
- 10%
- 11-03
- 20%
- 11-09
- 50%
- 11-23
- 80%
- 12-10
- 90%
- 12-20
Growing season length (days, 28°F threshold)
- Short year
- 212
- Median
- 255
- Long year
- 308
Source NOAA station
FALLS CITY 2 SSW, OR US
5.2 mi · 30 yrs of record (1991–2020) · 690 ft elev.
Data from FALLS CITY 2 SSW, OR US, 5.2 miles away with 30-year NOAA record (1991-2020).
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