Sullivan County, New Hampshire · Frost dates
Sullivan County frost dates.
First-frost, last-frost, and growing-season length for Sullivan County, New Hampshire. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5b
32°F — light freeze
Last spring frost
- 10%
- 05-29
- 20%
- 05-23
- 50%
- 05-14
- 80%
- 05-04
- 90%
- 04-30
First fall frost
- 10%
- 09-19
- 20%
- 09-24
- 50%
- 10-01
- 80%
- 10-08
- 90%
- 10-12
28°F — killing freeze
Last spring freeze
- 10%
- 05-17
- 20%
- 05-10
- 50%
- 05-01
- 80%
- 04-24
- 90%
- 04-19
First fall freeze
- 10%
- 10-01
- 20%
- 10-03
- 50%
- 10-11
- 80%
- 10-21
- 90%
- 10-28
Growing season length (days, 28°F threshold)
- Short year
- 137
- Median
- 163
- Long year
- 192
Source NOAA station
NEWPORT, NH US
2.3 mi · 30 yrs of record (1991–2020) · 770 ft elev.
Data from NEWPORT, NH US, 2.3 miles away with 30-year NOAA record (1991-2020).
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