Grand Isle County, Vermont · Frost dates
Grand Isle County frost dates.
First-frost, last-frost, and growing-season length for Grand Isle County, Vermont. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5a
32°F — light freeze
Last spring frost
- 10%
- 05-14
- 20%
- 05-08
- 50%
- 04-30
- 80%
- 04-21
- 90%
- 04-17
First fall frost
- 10%
- 09-29
- 20%
- 10-03
- 50%
- 10-12
- 80%
- 10-23
- 90%
- 10-30
28°F — killing freeze
Last spring freeze
- 10%
- 05-02
- 20%
- 04-27
- 50%
- 04-19
- 80%
- 04-10
- 90%
- 04-06
First fall freeze
- 10%
- 10-06
- 20%
- 10-12
- 50%
- 10-25
- 80%
- 11-04
- 90%
- 11-10
Growing season length (days, 28°F threshold)
- Short year
- 157
- Median
- 189
- Long year
- 218
Source NOAA station
CHAZY, NY US
7.0 mi · 30 yrs of record (1991–2020) · 157 ft elev.
Data from CHAZY, NY US, 7 miles away with 30-year NOAA record (1991-2020).
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