Gratiot County, Michigan · Frost dates
Gratiot County frost dates.
First-frost, last-frost, and growing-season length for Gratiot County, Michigan. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5b
32°F — light freeze
Last spring frost
- 10%
- 05-19
- 20%
- 05-13
- 50%
- 05-01
- 80%
- 04-22
- 90%
- 04-17
First fall frost
- 10%
- 09-29
- 20%
- 10-03
- 50%
- 10-13
- 80%
- 10-24
- 90%
- 10-30
28°F — killing freeze
Last spring freeze
- 10%
- 05-06
- 20%
- 04-30
- 50%
- 04-20
- 80%
- 04-10
- 90%
- 04-04
First fall freeze
- 10%
- 10-10
- 20%
- 10-17
- 50%
- 10-28
- 80%
- 11-04
- 90%
- 11-09
Growing season length (days, 28°F threshold)
- Short year
- 157
- Median
- 191
- Long year
- 219
Source NOAA station
ALMA, MI US
6.9 mi · 30 yrs of record (1991–2020) · 729 ft elev.
Data from ALMA, MI US, 6.9 miles away with 30-year NOAA record (1991-2020).
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