Madison County, Idaho · Frost dates
Madison County frost dates.
First-frost, last-frost, and growing-season length for Madison County, Idaho. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5b
32°F — light freeze
Last spring frost
- 10%
- 06-02
- 20%
- 05-27
- 50%
- 05-12
- 80%
- 05-03
- 90%
- 04-29
First fall frost
- 10%
- 09-06
- 20%
- 09-12
- 50%
- 09-24
- 80%
- 10-04
- 90%
- 10-08
28°F — killing freeze
Last spring freeze
- 10%
- 05-14
- 20%
- 05-09
- 50%
- 04-30
- 80%
- 04-18
- 90%
- 04-12
First fall freeze
- 10%
- 09-20
- 20%
- 09-27
- 50%
- 10-07
- 80%
- 10-17
- 90%
- 10-21
Growing season length (days, 28°F threshold)
- Short year
- 129
- Median
- 160
- Long year
- 192
Source NOAA station
REXBURG BYU IDAHO, ID US
6.7 mi · 30 yrs of record (1991–2020) · 5005 ft elev.
Data from REXBURG BYU IDAHO, ID US, 6.7 miles away with 30-year NOAA record (1991-2020).
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