Alamosa County, Colorado · Frost dates
Alamosa County frost dates.
First-frost, last-frost, and growing-season length for Alamosa County, Colorado. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5a
32°F — light freeze
Last spring frost
- 10%
- 06-13
- 20%
- 06-07
- 50%
- 05-30
- 80%
- 05-22
- 90%
- 05-17
First fall frost
- 10%
- 09-04
- 20%
- 09-10
- 50%
- 09-17
- 80%
- 09-24
- 90%
- 09-27
28°F — killing freeze
Last spring freeze
- 10%
- 06-01
- 20%
- 05-26
- 50%
- 05-16
- 80%
- 05-07
- 90%
- 05-02
First fall freeze
- 10%
- 09-16
- 20%
- 09-20
- 50%
- 09-27
- 80%
- 10-03
- 90%
- 10-05
Growing season length (days, 28°F threshold)
- Short year
- 107
- Median
- 134
- Long year
- 156
Source NOAA station
ALAMOSA 1E, CO US
7.8 mi · 30 yrs of record (1991–2020) · 7540 ft elev.
Data from ALAMOSA 1E, CO US, 7.8 miles away with 30-year NOAA record (1991-2020).
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