Franklin County, Iowa · Frost dates
Franklin County frost dates.
First-frost, last-frost, and growing-season length for Franklin County, Iowa. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5a
32°F — light freeze
Last spring frost
- 10%
- 05-10
- 20%
- 05-06
- 50%
- 04-29
- 80%
- 04-19
- 90%
- 04-15
First fall frost
- 10%
- 09-26
- 20%
- 09-30
- 50%
- 10-09
- 80%
- 10-17
- 90%
- 10-22
28°F — killing freeze
Last spring freeze
- 10%
- 05-01
- 20%
- 04-28
- 50%
- 04-19
- 80%
- 04-09
- 90%
- 04-05
First fall freeze
- 10%
- 10-04
- 20%
- 10-10
- 50%
- 10-20
- 80%
- 10-27
- 90%
- 11-01
Growing season length (days, 28°F threshold)
- Short year
- 156
- Median
- 184
- Long year
- 210
Source NOAA station
HAMPTON, IA US
3.8 mi · 30 yrs of record (1991–2020) · 1105 ft elev.
Data from HAMPTON, IA US, 3.8 miles away with 30-year NOAA record (1991-2020).
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