Adair County, Iowa · Frost dates
Adair County frost dates.
First-frost, last-frost, and growing-season length for Adair 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%
- 04-25
- 80%
- 04-16
- 90%
- 04-12
First fall frost
- 10%
- 09-26
- 20%
- 10-01
- 50%
- 10-12
- 80%
- 10-22
- 90%
- 10-26
28°F — killing freeze
Last spring freeze
- 10%
- 04-29
- 20%
- 04-25
- 50%
- 04-16
- 80%
- 04-07
- 90%
- 04-03
First fall freeze
- 10%
- 10-06
- 20%
- 10-13
- 50%
- 10-23
- 80%
- 11-01
- 90%
- 11-05
Growing season length (days, 28°F threshold)
- Short year
- 160
- Median
- 190
- Long year
- 216
Source NOAA station
GREENFIELD, IA US
2.9 mi · 30 yrs of record (1991–2020) · 1316 ft elev.
Data from GREENFIELD, IA US, 2.9 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
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