Clay County, Minnesota · Frost dates

Clay County frost dates.

First-frost, last-frost, and growing-season length for Clay 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%
05-14
50%
05-05
80%
04-28
90%
04-23

First fall frost

10%
09-22
20%
09-25
50%
10-03
80%
10-13
90%
10-18

28°F — killing freeze

Last spring freeze

10%
05-09
20%
05-05
50%
04-28
80%
04-18
90%
04-12

First fall freeze

10%
10-01
20%
10-04
50%
10-14
80%
10-24
90%
10-29

Growing season length (days, 28°F threshold)

Short year
145
Median
169
Long year
200

Source NOAA station

MOORHEAD, MN US

12.0 mi · 30 yrs of record (19912020) · 904 ft elev.

Data from MOORHEAD, MN US, 12 miles away with 30-year NOAA record (1991-2020).

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