Washington County Climate
Washington County, Maryland
Avg Annual Temp
53.5°F
Annual Precip
40.5"
Annual Snowfall
—
Extreme Heat Days
23.2
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Washington County Weather
A Temperate Climate in the Appalachian Valley
Washington County maintains an annual average temperature of 53.5°F, which sits right near the national median for temperate zones. The area receives 40.5 inches of annual precipitation, reflecting a standard Mid-Atlantic moisture profile.
Cooler Than the Maryland State Average
At 53.5°F, Washington County is notably cooler than the Maryland state average of 55.9°F. This temperature difference highlights the county's inland position and higher elevation compared to the warmer Chesapeake regions.
Crisper Air than Coastal Neighbors
Washington County is significantly cooler than Eastern Shore counties like Wicomico, which averages 57.8°F. It also receives about five inches less annual precipitation than the Maryland state average of 45.7 inches.
Variable Seasons with Mountain Influence
July averages 75.3°F with 23 days of extreme heat reaching above 90°F annually. Winters are chilly with a 33.6°F average, and while local snowfall data is limited, the conditions remain much colder than the coast.
Prepare for Freezing Winters and Humid Summers
Residents should ensure HVAC systems are ready for winter temperatures that average near freezing at 33.6°F. For summer, planning for 23 days of extreme heat is essential for outdoor safety and cooling costs.
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.