Monroe County, Michigan · Frost dates
Monroe County frost dates.
First-frost, last-frost, and growing-season length for Monroe County, Michigan. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5b
32°F — light freeze
Last spring frost
- 10%
- 05-07
- 20%
- 05-02
- 50%
- 04-23
- 80%
- 04-14
- 90%
- 04-08
First fall frost
- 10%
- 10-09
- 20%
- 10-14
- 50%
- 10-23
- 80%
- 11-01
- 90%
- 11-05
28°F — killing freeze
Last spring freeze
- 10%
- 04-27
- 20%
- 04-22
- 50%
- 04-14
- 80%
- 04-04
- 90%
- 03-31
First fall freeze
- 10%
- 10-21
- 20%
- 10-26
- 50%
- 11-04
- 80%
- 11-13
- 90%
- 11-18
Growing season length (days, 28°F threshold)
- Short year
- 177
- Median
- 204
- Long year
- 232
Source NOAA station
MONROE, MI US
3.7 mi · 30 yrs of record (1991–2020) · 586 ft elev.
Data from MONROE, MI US, 3.7 miles away with 30-year NOAA record (1991-2020).
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