Arlington County Climate
Arlington County, Virginia
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
59.3°F
Annual Precip
41.8"
Annual Snowfall
13.7"
Extreme Heat Days
40
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7b
Minimum winter temperature range for plant survival
4,709
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Arlington County
Climate Verdict
Arlington County has a mild, with an average annual temperature of 59.3°F, moderately wet with 41.8 inches of annual precipitation, occasional hot days — 40 per year above 90°F, light snow averaging 13.7 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 37.5°F. summers are hot, with July averaging 81.0°F. The 44°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
Arlington County is 3.1°F warmer than the Virginia statewide average of 56.2°F, it is somewhat drier than average for Virginia.
Climate Profile
About Arlington County Weather
Warm Urban Heat Island
Arlington's 59.3°F average temperature is more than 5 degrees warmer than the national median. This urban county experiences a hot, humid subtropical climate.
One of Virginia's Warmest Spots
Averaging 59.3°F, Arlington is significantly warmer than the 55.9°F state average. It is also drier than much of the state, receiving 41.8 inches of rain.
Hotter Than the Rural Interior
Arlington faces 40 extreme heat days, far more than neighboring mountain counties. Its July average of 81.0°F is the highest among the counties in this group.
Hot Summers and Brief Winters
Summers are intense with 40 days over 90°F and high humidity. Winters are mild at 39.7°F, though the county still sees a surprising 13.7 inches of snow annually.
Focus on Cooling and Commuting
Invest in high-quality air conditioning to handle the 40+ days of extreme heat. Residents should also prepare for urban snow impacts, which can disrupt transit despite mild averages.
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.