Wapello County, Iowa · Frost dates
Wapello County frost dates.
First-frost, last-frost, and growing-season length for Wapello County, Iowa. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5a
32°F — light freeze
Last spring frost
- 10%
- 05-07
- 20%
- 05-03
- 50%
- 04-23
- 80%
- 04-13
- 90%
- 04-09
First fall frost
- 10%
- 09-29
- 20%
- 10-03
- 50%
- 10-14
- 80%
- 10-23
- 90%
- 10-26
28°F — killing freeze
Last spring freeze
- 10%
- 04-28
- 20%
- 04-23
- 50%
- 04-13
- 80%
- 04-04
- 90%
- 04-01
First fall freeze
- 10%
- 10-10
- 20%
- 10-16
- 50%
- 10-24
- 80%
- 11-01
- 90%
- 11-05
Growing season length (days, 28°F threshold)
- Short year
- 165
- Median
- 194
- Long year
- 218
Source NOAA station
OTTUMWA INDUSTRIAL AP, IA US
5.6 mi · 30 yrs of record (1991–2020) · 842 ft elev.
Data from OTTUMWA INDUSTRIAL AP, IA US, 5.6 miles away with 30-year NOAA record (1991-2020).
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