Washington County Climate
Washington County, Maryland
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
53.5°F
Annual Precip
40.5"
Annual Snowfall
—
Extreme Heat Days
23
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7a
Minimum winter temperature range for plant survival
3,472
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Washington County
Climate Verdict
Washington County has a mild, with an average annual temperature of 53.5°F, moderately wet with 40.5 inches of annual precipitation, occasional hot days — 23.2 per year above 90°F. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 31.5°F. summers are warm — July averages 75.3°F. The 44°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Washington County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Washington County closely matches the Maryland statewide average temperature of 55.9°F, it is also noticeably drier, receiving 5.3 inches less precipitation than the state average.
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 sources: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020. Forecast and alert data from National Weather Service API. Air quality data from Open-Meteo.
Climate normals are 30-year averages of weather variables. Station data is aggregated to county level. Forecasts and alerts are fetched live and may change frequently. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.