Washington County Climate
Washington County, Rhode Island
Avg Annual Temp
50.7°F
Annual Precip
49.7"
Annual Snowfall
34.5"
Extreme Heat Days
4.4
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Washington County Weather
A temperate pocket of the Northeast
Washington County averages 50.7°F annually, sitting roughly three degrees below the national median. This coastal region balances continental air masses with the tempering effects of the Atlantic.
Slightly cooler than the state average
The county’s 50.7°F average is just below the Rhode Island state average of 51.2°F. Its precipitation levels of 49.7 inches align closely with the statewide norm of 49.1 inches.
Cooler and wetter than Newport
Washington County is wetter than neighbor Newport, receiving 49.7 inches of rain compared to Newport's 46.3. It also stays cooler on average, though it shares similar coastal weather patterns.
The state's fewest extreme heat days
The county records only 4 days per year over 90°F, the lowest count in Rhode Island. Winters are moderate with 34.5 inches of snowfall and an average winter temperature of 32.2°F.
Prepare for rain and moderate winters
Quality rain gear is essential for the nearly 50 inches of annual precipitation. Because extreme heat is rare, residents can often rely on natural ventilation rather than heavy air conditioning during the 69.4°F summers.
Frequently Asked Questions
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Data source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.