Sanilac County, Michigan · Frost dates
Sanilac County frost dates.
First-frost, last-frost, and growing-season length for Sanilac County, Michigan. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5b
32°F — light freeze
Last spring frost
- 10%
- 05-17
- 20%
- 05-11
- 50%
- 05-02
- 80%
- 04-24
- 90%
- 04-19
First fall frost
- 10%
- 10-01
- 20%
- 10-06
- 50%
- 10-16
- 80%
- 10-27
- 90%
- 11-01
28°F — killing freeze
Last spring freeze
- 10%
- 05-06
- 20%
- 05-01
- 50%
- 04-22
- 80%
- 04-12
- 90%
- 04-07
First fall freeze
- 10%
- 10-14
- 20%
- 10-21
- 50%
- 10-30
- 80%
- 11-07
- 90%
- 11-12
Growing season length (days, 28°F threshold)
- Short year
- 161
- Median
- 191
- Long year
- 219
Source NOAA station
SANDUSKY, MI US
9.1 mi · 30 yrs of record (1991–2020) · 774 ft elev.
Data from SANDUSKY, MI US, 9.1 miles away with 30-year NOAA record (1991-2020).
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