Woodbury County, Iowa · Frost dates
Woodbury County frost dates.
First-frost, last-frost, and growing-season length for Woodbury County, Iowa. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5a
32°F — light freeze
Last spring frost
- 10%
- 05-11
- 20%
- 05-07
- 50%
- 04-29
- 80%
- 04-19
- 90%
- 04-15
First fall frost
- 10%
- 09-24
- 20%
- 09-28
- 50%
- 10-07
- 80%
- 10-16
- 90%
- 10-21
28°F — killing freeze
Last spring freeze
- 10%
- 05-02
- 20%
- 04-29
- 50%
- 04-19
- 80%
- 04-10
- 90%
- 04-05
First fall freeze
- 10%
- 10-02
- 20%
- 10-08
- 50%
- 10-18
- 80%
- 10-26
- 90%
- 10-30
Growing season length (days, 28°F threshold)
- Short year
- 153
- Median
- 182
- Long year
- 208
Source NOAA station
SIOUX CITY ANG, IA US
16.6 mi · 30 yrs of record (1991–2020) · 1100 ft elev.
Data from SIOUX CITY ANG, IA US, 16.6 miles away with 30-year NOAA record (1991-2020).
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