Delta County, Michigan · Frost dates
Delta County frost dates.
First-frost, last-frost, and growing-season length for Delta County, Michigan. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5b
32°F — light freeze
Last spring frost
- 10%
- 06-02
- 20%
- 05-29
- 50%
- 05-18
- 80%
- 05-08
- 90%
- 05-03
First fall frost
- 10%
- 09-18
- 20%
- 09-23
- 50%
- 10-04
- 80%
- 10-14
- 90%
- 10-18
28°F — killing freeze
Last spring freeze
- 10%
- 05-21
- 20%
- 05-16
- 50%
- 05-05
- 80%
- 04-27
- 90%
- 04-23
First fall freeze
- 10%
- 10-01
- 20%
- 10-06
- 50%
- 10-17
- 80%
- 10-28
- 90%
- 11-02
Growing season length (days, 28°F threshold)
- Short year
- 133
- Median
- 165
- Long year
- 193
Source NOAA station
RAPID RVR 4SSE, MI US
5.2 mi · 30 yrs of record (1991–2020) · 598 ft elev.
Data from RAPID RVR 4SSE, MI US, 5.2 miles away with 30-year NOAA record (1991-2020).
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