Dawson County, Montana · Frost dates

Dawson County frost dates.

First-frost, last-frost, and growing-season length for Dawson County, Montana. Sourced from NOAA 1991-2020 Climate Normals.

Data confidence: high · USDA zone: 4b

32°F — light freeze

Last spring frost

10%
05-16
20%
05-12
50%
05-03
80%
04-24
90%
04-19

First fall frost

10%
09-22
20%
09-26
50%
10-04
80%
10-13
90%
10-17

28°F — killing freeze

Last spring freeze

10%
05-08
20%
05-03
50%
04-24
80%
04-14
90%
04-09

First fall freeze

10%
09-30
20%
10-04
50%
10-13
80%
10-22
90%
10-27

Growing season length (days, 28°F threshold)

Short year
145
Median
172
Long year
201

Source NOAA station

GLENDIVE, MT US

14.0 mi · 30 yrs of record (19912020) · 2075 ft elev.

Data from GLENDIVE, MT US, 14 miles away with 30-year NOAA record (1991-2020).

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