Palo Alto County, Iowa · Frost dates
Palo Alto County frost dates.
First-frost, last-frost, and growing-season length for Palo Alto County, Iowa. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5a
32°F — light freeze
Last spring frost
- 10%
- 05-09
- 20%
- 05-04
- 50%
- 04-27
- 80%
- 04-16
- 90%
- 04-11
First fall frost
- 10%
- 09-23
- 20%
- 09-28
- 50%
- 10-07
- 80%
- 10-18
- 90%
- 10-22
28°F — killing freeze
Last spring freeze
- 10%
- 04-30
- 20%
- 04-27
- 50%
- 04-16
- 80%
- 04-06
- 90%
- 04-03
First fall freeze
- 10%
- 10-02
- 20%
- 10-08
- 50%
- 10-20
- 80%
- 10-28
- 90%
- 11-01
Growing season length (days, 28°F threshold)
- Short year
- 155
- Median
- 187
- Long year
- 212
Source NOAA station
EMMETSBURG, IA US
2.0 mi · 30 yrs of record (1991–2020) · 1225 ft elev.
Data from EMMETSBURG, IA US, 2 miles away with 30-year NOAA record (1991-2020).
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