Laramie County, Wyoming · Frost dates

Laramie County frost dates.

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

Data confidence: high · USDA zone: 5a

32°F — light freeze

Last spring frost

10%
06-06
20%
06-01
50%
05-21
80%
05-12
90%
05-08

First fall frost

10%
09-08
20%
09-14
50%
09-24
80%
10-01
90%
10-05

28°F — killing freeze

Last spring freeze

10%
05-24
20%
05-18
50%
05-09
80%
05-01
90%
04-28

First fall freeze

10%
09-18
20%
09-24
50%
10-01
80%
10-11
90%
10-16

Growing season length (days, 28°F threshold)

Short year
117
Median
145
Long year
171

Source NOAA station

ARCHER, WY US

9.8 mi · 30 yrs of record (19912020) · 6010 ft elev.

Data from ARCHER, WY US, 9.8 miles away with 30-year NOAA record (1991-2020).

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