Hettinger County, North Dakota · Frost dates

Hettinger County frost dates.

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

Data confidence: high · USDA zone: 4a

32°F — light freeze

Last spring frost

10%
05-30
20%
05-25
50%
05-16
80%
05-09
90%
05-06

First fall frost

10%
09-11
20%
09-17
50%
09-25
80%
10-03
90%
10-07

28°F — killing freeze

Last spring freeze

10%
05-21
20%
05-15
50%
05-07
80%
04-30
90%
04-25

First fall freeze

10%
09-19
20%
09-24
50%
10-03
80%
10-12
90%
10-17

Growing season length (days, 28°F threshold)

Short year
121
Median
149
Long year
175

Source NOAA station

MOTT, ND US

7.6 mi · 30 yrs of record (19912020) · 2426 ft elev.

Data from MOTT, ND US, 7.6 miles away with 30-year NOAA record (1991-2020).

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