Blue Earth County, Minnesota · Frost dates
Blue Earth County frost dates.
First-frost, last-frost, and growing-season length for Blue Earth County, Minnesota. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 4a
32°F — light freeze
Last spring frost
- 10%
- 05-12
- 20%
- 05-07
- 50%
- 04-30
- 80%
- 04-20
- 90%
- 04-16
First fall frost
- 10%
- 09-25
- 20%
- 09-29
- 50%
- 10-09
- 80%
- 10-18
- 90%
- 10-22
28°F — killing freeze
Last spring freeze
- 10%
- 05-02
- 20%
- 04-28
- 50%
- 04-19
- 80%
- 04-10
- 90%
- 04-06
First fall freeze
- 10%
- 10-04
- 20%
- 10-10
- 50%
- 10-20
- 80%
- 10-27
- 90%
- 11-01
Growing season length (days, 28°F threshold)
- Short year
- 155
- Median
- 184
- Long year
- 209
Source NOAA station
MANKATO, MN US
8.6 mi · 30 yrs of record (1991–2020) · 850 ft elev.
Data from MANKATO, MN US, 8.6 miles away with 30-year NOAA record (1991-2020).
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