Want to know what the weather is now? Rain on Thursday and Friday. Historical Weather. Clear throughout the day. Manassas 5 day forecast with weather outlook providing day and night summary including precipitation, high and low temperatures presented in Fahrenheit and Celsius, sky conditions, rain chance, sunrise, sunset, wind chill, and wind speed with direction. Manassas VA 5 Day Weather Forecast from LocalConditions.com. Check out our current live radar and weather forecasts for Manassas, Virginia to help plan your day Manassas, VA Monthly Weather. 38.75 °N, 77.47 °W Manassas, VA Weather History star_ratehome. 63 F Washington Dulles International Airport Station | Report. 29. 50 ° 31 ° 3. Current conditions at Manassas, Manassas Regional Airport/Harry P. Davis Field (KHEF) Lat: 38.72°NLon: 77.52°WElev: 194ft. 1:20 am EST sun mon tue wed thu fri sat. 60 ° 28 ° 30. 48 ° 41 ° 6. Aviation Weather Forecast at Manassas, Virginia Station: KHEF North: 38.72 West: -77.52 Timezone: Eastern Standard Time UTC: -5 Model: National Blend of Models - Aviation Format Manassas Extended Forecast with high and low temperatures. Last 2 weeks of weather 47 ° 39 ° 2. star. °F. Find the most current and reliable 7 day weather forecasts, storm alerts, reports and information for [city] with The Weather Network. December 26, 2020: Manassas weather forecast for now and the week ahead — Clear for the hour. 61 ° 47 ° 1. 53 ° 24 ° 4. Report Station. 53 ° 42 ° 5. Know what's coming with AccuWeather's extended daily forecasts for Manassas, VA. Up to 90 days of daily highs, lows, and precipitation chances. Interactive weather map allows you to pan and zoom to get unmatched weather details in your local neighborhood or half a world away from The Weather Channel and ... Manassas, VA Weather… Know what's coming with AccuWeather's extended daily forecasts for Manassas, VA. Up to 90 days of daily highs, lows, and precipitation chances.