Pottawattamie County, Iowa · Frost dates
Pottawattamie County frost dates.
First-frost, last-frost, and growing-season length for Pottawattamie County, Iowa. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5a
32°F — light freeze
Last spring frost
- 10%
- 05-05
- 20%
- 05-01
- 50%
- 04-23
- 80%
- 04-15
- 90%
- 04-10
First fall frost
- 10%
- 09-30
- 20%
- 10-04
- 50%
- 10-14
- 80%
- 10-23
- 90%
- 10-27
28°F — killing freeze
Last spring freeze
- 10%
- 04-28
- 20%
- 04-24
- 50%
- 04-15
- 80%
- 04-05
- 90%
- 03-31
First fall freeze
- 10%
- 10-11
- 20%
- 10-15
- 50%
- 10-25
- 80%
- 11-01
- 90%
- 11-06
Growing season length (days, 28°F threshold)
- Short year
- 166
- Median
- 193
- Long year
- 220
Source NOAA station
OAKLAND, IA US
8.7 mi · 30 yrs of record (1991–2020) · 1260 ft elev.
Data from OAKLAND, IA US, 8.7 miles away with 30-year NOAA record (1991-2020).
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