Iron County, Wisconsin · Frost dates
Iron County frost dates.
First-frost, last-frost, and growing-season length for Iron County, Wisconsin. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5a
32°F — light freeze
Last spring frost
- 10%
- 06-07
- 20%
- 06-02
- 50%
- 05-24
- 80%
- 05-11
- 90%
- 05-04
First fall frost
- 10%
- 09-13
- 20%
- 09-19
- 50%
- 09-28
- 80%
- 10-06
- 90%
- 10-11
28°F — killing freeze
Last spring freeze
- 10%
- 05-28
- 20%
- 05-22
- 50%
- 05-08
- 80%
- 04-28
- 90%
- 04-23
First fall freeze
- 10%
- 09-22
- 20%
- 09-28
- 50%
- 10-08
- 80%
- 10-18
- 90%
- 10-23
Growing season length (days, 28°F threshold)
- Short year
- 117
- Median
- 153
- Long year
- 183
Source NOAA station
HURLEY, WI US
9.9 mi · 30 yrs of record (1991–2020) · 1444 ft elev.
Data from HURLEY, WI US, 9.9 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
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