Jerome County, Idaho · Frost dates
Jerome County frost dates.
First-frost, last-frost, and growing-season length for Jerome County, Idaho. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5b
32°F — light freeze
Last spring frost
- 10%
- 05-26
- 20%
- 05-17
- 50%
- 05-07
- 80%
- 04-29
- 90%
- 04-24
First fall frost
- 10%
- 09-19
- 20%
- 09-25
- 50%
- 10-05
- 80%
- 10-14
- 90%
- 10-19
28°F — killing freeze
Last spring freeze
- 10%
- 05-08
- 20%
- 05-03
- 50%
- 04-23
- 80%
- 04-11
- 90%
- 04-06
First fall freeze
- 10%
- 10-02
- 20%
- 10-07
- 50%
- 10-17
- 80%
- 10-27
- 90%
- 11-01
Growing season length (days, 28°F threshold)
- Short year
- 147
- Median
- 177
- Long year
- 209
Source NOAA station
HAZELTON, ID US
9.1 mi · 30 yrs of record (1991–2020) · 4060 ft elev.
Data from HAZELTON, ID US, 9.1 miles away with 30-year NOAA record (1991-2020).
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