Manassas city Climate
Manassas city, Virginia
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
55.5°F
Annual Precip
—
Annual Snowfall
—
Extreme Heat Days
41
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7a
Minimum winter temperature range for plant survival
3,908
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Manassas city
Climate Verdict
Manassas city has a mild, with an average annual temperature of 55.5°F, occasional hot days — 40.5 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 33.3°F. summers are warm — July averages 78.1°F. The 45°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
The moderate temperatures support hiking, cycling, and camping comfortably in spring, summer, and fall.
Regional Context
Manassas city closely matches the Virginia statewide average temperature of 56.2°F.
Climate Profile
About Manassas city Weather
A Warm Hub in the Mid-Atlantic
Manassas city averages 55.5°F annually, placing it above the national median. The city experiences a humid subtropical climate with significant summer heat and distinct winter cooling.
Typical Virginia Temperature Profile
The city's 55.5°F average sits just below the Virginia statewide average of 55.9°F. This makes Manassas warmer than many Northern Virginia counties but cooler than the coastal southeast.
Warmer and Hotter Than Loudoun
Manassas is warmer than Loudoun County (54.8°F) and experiences more intense summer peaks. The city's July average of 78.1°F makes it one of the warmer urban centers in the northern region.
Intense Summer Heat Waves
Summer is the dominant season, featuring 41 days of extreme heat above 90°F. Winters are relatively moderate with a 35.5°F average, though local snowfall records are currently unavailable.
Prepare for Forty Hot Days
With 41 days of extreme heat, a high-performance cooling system is the most critical home investment. Residents should plan outdoor activities for early morning to avoid the frequent 90-degree afternoon peaks.
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.