Dallas County, Iowa · Frost dates
Dallas County frost dates.
First-frost, last-frost, and growing-season length for Dallas County, Iowa. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5a
32°F — light freeze
Last spring frost
- 10%
- 05-08
- 20%
- 05-05
- 50%
- 04-25
- 80%
- 04-16
- 90%
- 04-12
First fall frost
- 10%
- 09-25
- 20%
- 09-30
- 50%
- 10-10
- 80%
- 10-19
- 90%
- 10-24
28°F — killing freeze
Last spring freeze
- 10%
- 04-30
- 20%
- 04-25
- 50%
- 04-16
- 80%
- 04-06
- 90%
- 04-02
First fall freeze
- 10%
- 10-05
- 20%
- 10-12
- 50%
- 10-22
- 80%
- 10-30
- 90%
- 11-03
Growing season length (days, 28°F threshold)
- Short year
- 158
- Median
- 189
- Long year
- 215
Source NOAA station
PERRY, IA US
11.2 mi · 30 yrs of record (1991–2020) · 950 ft elev.
Data from PERRY, IA US, 11.2 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
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