Humboldt County, Iowa · Frost dates
Humboldt County frost dates.
First-frost, last-frost, and growing-season length for Humboldt 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%
- 05-05
- 50%
- 04-26
- 80%
- 04-16
- 90%
- 04-11
First fall frost
- 10%
- 09-29
- 20%
- 10-03
- 50%
- 10-12
- 80%
- 10-20
- 90%
- 10-25
28°F — killing freeze
Last spring freeze
- 10%
- 05-01
- 20%
- 04-26
- 50%
- 04-16
- 80%
- 04-06
- 90%
- 04-02
First fall freeze
- 10%
- 10-11
- 20%
- 10-15
- 50%
- 10-23
- 80%
- 10-31
- 90%
- 11-04
Growing season length (days, 28°F threshold)
- Short year
- 163
- Median
- 190
- Long year
- 216
Source NOAA station
DAKOTA CITY, IA US
3.9 mi · 30 yrs of record (1991–2020) · 1110 ft elev.
Data from DAKOTA CITY, IA US, 3.9 miles away with 30-year NOAA record (1991-2020).
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