Isanti County, Minnesota · Frost dates
Isanti County frost dates.
First-frost, last-frost, and growing-season length for Isanti County, Minnesota. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 4a
32°F — light freeze
Last spring frost
- 10%
- 05-20
- 20%
- 05-13
- 50%
- 05-02
- 80%
- 04-22
- 90%
- 04-17
First fall frost
- 10%
- 09-20
- 20%
- 09-24
- 50%
- 10-04
- 80%
- 10-14
- 90%
- 10-19
28°F — killing freeze
Last spring freeze
- 10%
- 05-06
- 20%
- 04-30
- 50%
- 04-21
- 80%
- 04-11
- 90%
- 04-06
First fall freeze
- 10%
- 09-28
- 20%
- 10-02
- 50%
- 10-15
- 80%
- 10-28
- 90%
- 11-03
Growing season length (days, 28°F threshold)
- Short year
- 145
- Median
- 177
- Long year
- 211
Source NOAA station
CAMBRIDGE, MN US
3.0 mi · 30 yrs of record (1991–2020) · 965 ft elev.
Data from CAMBRIDGE, MN US, 3 miles away with 30-year NOAA record (1991-2020).
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