Alcona County, Michigan · Frost dates
Alcona County frost dates.
First-frost, last-frost, and growing-season length for Alcona County, Michigan. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5b
32°F — light freeze
Last spring frost
- 10%
- 05-24
- 20%
- 05-19
- 50%
- 05-08
- 80%
- 04-30
- 90%
- 04-26
First fall frost
- 10%
- 10-02
- 20%
- 10-07
- 50%
- 10-16
- 80%
- 10-26
- 90%
- 10-30
28°F — killing freeze
Last spring freeze
- 10%
- 05-12
- 20%
- 05-06
- 50%
- 04-27
- 80%
- 04-18
- 90%
- 04-13
First fall freeze
- 10%
- 10-15
- 20%
- 10-20
- 50%
- 10-29
- 80%
- 11-06
- 90%
- 11-12
Growing season length (days, 28°F threshold)
- Short year
- 156
- Median
- 185
- Long year
- 213
Source NOAA station
HARRISVILLE 2NNE, MI US
1.8 mi · 30 yrs of record (1991–2020) · 585 ft elev.
Data from HARRISVILLE 2NNE, MI US, 1.8 miles away with 30-year NOAA record (1991-2020).
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