San Juan County, Utah · Frost dates
San Juan County frost dates.
First-frost, last-frost, and growing-season length for San Juan County, Utah. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6b
32°F — light freeze
Last spring frost
- 10%
- 05-27
- 20%
- 05-19
- 50%
- 05-05
- 80%
- 04-26
- 90%
- 04-22
First fall frost
- 10%
- 09-29
- 20%
- 10-02
- 50%
- 10-13
- 80%
- 10-22
- 90%
- 10-27
28°F — killing freeze
Last spring freeze
- 10%
- 05-11
- 20%
- 05-05
- 50%
- 04-24
- 80%
- 04-13
- 90%
- 04-06
First fall freeze
- 10%
- 10-07
- 20%
- 10-12
- 50%
- 10-23
- 80%
- 11-02
- 90%
- 11-08
Growing season length (days, 28°F threshold)
- Short year
- 149
- Median
- 182
- Long year
- 216
Source NOAA station
NATURAL BRIDGES NM, UT US
10.2 mi · 30 yrs of record (1991–2020) · 6508 ft elev.
Data from NATURAL BRIDGES NM, UT US, 10.2 miles away with 30-year NOAA record (1991-2020).
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