Iron County, Utah · Frost dates
Iron County frost dates.
First-frost, last-frost, and growing-season length for Iron County, Utah. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6b
32°F — light freeze
Last spring frost
- 10%
- 06-08
- 20%
- 06-02
- 50%
- 05-21
- 80%
- 05-09
- 90%
- 05-04
First fall frost
- 10%
- 09-17
- 20%
- 09-22
- 50%
- 09-29
- 80%
- 10-09
- 90%
- 10-14
28°F — killing freeze
Last spring freeze
- 10%
- 05-25
- 20%
- 05-17
- 50%
- 05-06
- 80%
- 04-26
- 90%
- 04-21
First fall freeze
- 10%
- 09-26
- 20%
- 09-30
- 50%
- 10-09
- 80%
- 10-19
- 90%
- 10-24
Growing season length (days, 28°F threshold)
- Short year
- 124
- Median
- 156
- Long year
- 186
Source NOAA station
CEDAR CITY MUNI AP, UT US
18.1 mi · 30 yrs of record (1991–2020) · 5586 ft elev.
Data from CEDAR CITY MUNI AP, UT US, 18.1 miles away with 30-year NOAA record (1991-2020).
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