Mitchell County, Iowa · Frost dates
Mitchell County frost dates.
First-frost, last-frost, and growing-season length for Mitchell County, Iowa. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5a
32°F — light freeze
Last spring frost
- 10%
- 05-12
- 20%
- 05-07
- 50%
- 04-30
- 80%
- 04-19
- 90%
- 04-14
First fall frost
- 10%
- 09-25
- 20%
- 09-29
- 50%
- 10-09
- 80%
- 10-17
- 90%
- 10-21
28°F — killing freeze
Last spring freeze
- 10%
- 04-30
- 20%
- 04-27
- 50%
- 04-17
- 80%
- 04-07
- 90%
- 04-03
First fall freeze
- 10%
- 10-05
- 20%
- 10-10
- 50%
- 10-20
- 80%
- 10-27
- 90%
- 11-01
Growing season length (days, 28°F threshold)
- Short year
- 158
- Median
- 186
- Long year
- 212
Source NOAA station
OSAGE, IA US
5.0 mi · 30 yrs of record (1991–2020) · 1170 ft elev.
Data from OSAGE, IA US, 5 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
14-day free trial. No credit card. Cancel anytime.