Strafford County, New Hampshire · Frost dates
Strafford County frost dates.
First-frost, last-frost, and growing-season length for Strafford County, New Hampshire. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5b
32°F — light freeze
Last spring frost
- 10%
- 05-13
- 20%
- 05-08
- 50%
- 04-30
- 80%
- 04-22
- 90%
- 04-18
First fall frost
- 10%
- 09-27
- 20%
- 10-01
- 50%
- 10-09
- 80%
- 10-18
- 90%
- 10-25
28°F — killing freeze
Last spring freeze
- 10%
- 04-29
- 20%
- 04-25
- 50%
- 04-17
- 80%
- 04-08
- 90%
- 04-04
First fall freeze
- 10%
- 10-07
- 20%
- 10-12
- 50%
- 10-23
- 80%
- 11-02
- 90%
- 11-07
Growing season length (days, 28°F threshold)
- Short year
- 161
- Median
- 189
- Long year
- 217
Source NOAA station
ROCHESTER SKYHAVEN AP, NH US
5.8 mi · 30 yrs of record (1991–2020) · 323 ft elev.
Data from ROCHESTER SKYHAVEN AP, NH US, 5.8 miles away with 30-year NOAA record (1991-2020).
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