Grant County, North Dakota · Frost dates

Grant County frost dates.

First-frost, last-frost, and growing-season length for Grant County, North Dakota. Sourced from NOAA 1991-2020 Climate Normals.

Data confidence: high · USDA zone: 4a

32°F — light freeze

Last spring frost

10%
06-01
20%
05-28
50%
05-19
80%
05-11
90%
05-07

First fall frost

10%
09-11
20%
09-17
50%
09-25
80%
10-03
90%
10-08

28°F — killing freeze

Last spring freeze

10%
05-25
20%
05-20
50%
05-11
80%
05-03
90%
04-29

First fall freeze

10%
09-20
20%
09-24
50%
10-02
80%
10-12
90%
10-16

Growing season length (days, 28°F threshold)

Short year
118
Median
144
Long year
170

Source NOAA station

CARSON, ND US

5.6 mi · 30 yrs of record (19912020) · 2335 ft elev.

Data from CARSON, ND US, 5.6 miles away with 30-year NOAA record (1991-2020).

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