Bonneville County, Idaho · Frost dates
Bonneville County frost dates.
First-frost, last-frost, and growing-season length for Bonneville County, Idaho. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5b
32°F — light freeze
Last spring frost
- 10%
- 06-26
- 20%
- 06-21
- 50%
- 06-09
- 80%
- 05-27
- 90%
- 05-19
First fall frost
- 10%
- 08-27
- 20%
- 09-01
- 50%
- 09-11
- 80%
- 09-22
- 90%
- 09-27
28°F — killing freeze
Last spring freeze
- 10%
- 06-10
- 20%
- 06-04
- 50%
- 05-19
- 80%
- 05-09
- 90%
- 05-04
First fall freeze
- 10%
- 09-04
- 20%
- 09-11
- 50%
- 09-23
- 80%
- 10-04
- 90%
- 10-10
Growing season length (days, 28°F threshold)
- Short year
- 86
- Median
- 127
- Long year
- 159
Source NOAA station
IDAHO FALLS 16 SE, ID US
8.9 mi · 30 yrs of record (1991–2020) · 5828 ft elev.
Data from IDAHO FALLS 16 SE, ID US, 8.9 miles away with 30-year NOAA record (1991-2020).
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