Rio Grande County, Colorado · Frost dates

Rio Grande County frost dates.

First-frost, last-frost, and growing-season length for Rio Grande County, Colorado. Sourced from NOAA 1991-2020 Climate Normals.

Data confidence: high · USDA zone: 5a

32°F — light freeze

Last spring frost

10%
06-25
20%
06-20
50%
06-11
80%
06-04
90%
06-01

First fall frost

10%
09-01
20%
09-05
50%
09-13
80%
09-20
90%
09-24

28°F — killing freeze

Last spring freeze

10%
06-12
20%
06-07
50%
05-30
80%
05-19
90%
05-15

First fall freeze

10%
09-11
20%
09-15
50%
09-23
80%
10-01
90%
10-04

Growing season length (days, 28°F threshold)

Short year
91
Median
116
Long year
142

Source NOAA station

MONTE VISTA 2W, CO US

16.0 mi · 30 yrs of record (19912020) · 7695 ft elev.

Data from MONTE VISTA 2W, CO US, 16 miles away with 30-year NOAA record (1991-2020).

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