Wayne County, Iowa · Frost dates
Wayne County frost dates.
First-frost, last-frost, and growing-season length for Wayne County, Iowa. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5a
32°F — light freeze
Last spring frost
- 10%
- 05-06
- 20%
- 05-01
- 50%
- 04-21
- 80%
- 04-12
- 90%
- 04-07
First fall frost
- 10%
- 10-03
- 20%
- 10-07
- 50%
- 10-19
- 80%
- 10-26
- 90%
- 10-29
28°F — killing freeze
Last spring freeze
- 10%
- 04-25
- 20%
- 04-21
- 50%
- 04-11
- 80%
- 04-03
- 90%
- 03-30
First fall freeze
- 10%
- 10-15
- 20%
- 10-19
- 50%
- 10-27
- 80%
- 11-03
- 90%
- 11-07
Growing season length (days, 28°F threshold)
- Short year
- 173
- Median
- 199
- Long year
- 222
Source NOAA station
ALLERTON, IA US
3.2 mi · 30 yrs of record (1991–2020) · 1090 ft elev.
Data from ALLERTON, IA US, 3.2 miles away with 30-year NOAA record (1991-2020).
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