Washington County, Rhode Island · Frost dates
Washington County frost dates.
First-frost, last-frost, and growing-season length for Washington County, Rhode Island. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6b
32°F — light freeze
Last spring frost
- 10%
- 05-18
- 20%
- 05-12
- 50%
- 05-01
- 80%
- 04-23
- 90%
- 04-19
First fall frost
- 10%
- 10-01
- 20%
- 10-03
- 50%
- 10-12
- 80%
- 10-21
- 90%
- 10-27
28°F — killing freeze
Last spring freeze
- 10%
- 05-03
- 20%
- 04-28
- 50%
- 04-18
- 80%
- 04-08
- 90%
- 04-03
First fall freeze
- 10%
- 10-11
- 20%
- 10-15
- 50%
- 10-25
- 80%
- 11-03
- 90%
- 11-08
Growing season length (days, 28°F threshold)
- Short year
- 161
- Median
- 190
- Long year
- 219
Source NOAA station
KINGSTON 1 W, RI US
6.9 mi · 30 yrs of record (1991–2020) · 106 ft elev.
Data from KINGSTON 1 W, RI US, 6.9 miles away with 30-year NOAA record (1991-2020).
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