Weather
Dulles, Virginia
Current Conditions
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Almanac
Average High: 60°
Average Low: 36°
Record high/year: 74° (1965)
Record low/year: 22° (1991)
Sunrise: 6:43 AM
Sunset: 5:02 PM
Detailed History
Sun and Moon
Sunrise: 06:43 AM (EST)
Moon Rise: 09:37 PM (EST) 11 7
Sunset: 05:02 PM (EST)
Moon Set: 11:43 AM (EST) 11 7
Moon Phase
Air Pollution
Next 12 Hours
Forecast data from the National Digital Forecast Database
5-Day Forecast
Forecast for Loudoun
Tonight
Mostly clear. Lows in the lower 40s. Southwest winds 5 to 10 mph.
Sunday
Sunny. Highs in the upper 60s. Northwest winds around 5 mph...becoming northeast in the afternoon.
Sunday Night
Mostly clear. Lows in the mid 40s. South winds around 5 mph.
Monday
Sunny. Highs in the upper 60s. South winds 5 to 10 mph.
Monday Night
Partly cloudy. Lows in the upper 40s. South winds around 5 mph...becoming west after midnight.
Tuesday
Partly sunny. Highs in the mid 60s.
Tuesday Night
Mostly cloudy. Lows in the lower 40s.
Veterans Day
Mostly sunny. Highs in the lower 50s.
Wednesday Night
Partly cloudy. Lows in the mid 30s.
Thursday
Sunny. Highs in the upper 50s.
Thursday Night
Mostly clear. Lows in the mid 30s.
Friday
Mostly sunny. Highs around 60.
Friday Night
Partly cloudy. Lows in the lower 40s.
Saturday
Mostly sunny. Highs in the mid 60s.
Personal Weather Stations
Personal Weather Stations [Add your weather station!]
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Location: VADOT Site_G, Herndon, VA Updated: 7:37 PM EST |
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| Temperature: 54 °F | Dew Point: 39 °F | Humidity: 57% | Wind: SSE at 9 mph | Pressure: - | Hourly Precipitation: 0.00 in | Windchill: - | Historical Graphs |
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Location: Broadlands Southern Walk, Ashburn, VA Updated: 8:11 PM EST |
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| Temperature: 46.6 °F | Dew Point: 29 °F | Humidity: 51% | Wind: Calm | Pressure: 29.85 in | Hourly Precipitation: 0.00 in | Windchill: 47 °F | Historical Graphs |
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Location: Ashburn Manor, Ashburn, VA Updated: 8:11 PM EST |
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| Temperature: 46.0 °F | Dew Point: 32 °F | Humidity: 58% | Wind: Calm | Pressure: 29.94 in | Hourly Precipitation: 0.00 in | Windchill: 46 °F | Historical Graphs |
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Location: Brambleton, Ashburn, VA Updated: 8:11 PM EST |
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| Temperature: 48.2 °F | Dew Point: 38 °F | Humidity: 69% | Wind: Calm | Pressure: 30.11 in | Hourly Precipitation: 0.00 in | Windchill: 48 °F | Historical Graphs |
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Location: Weatherscience.net, Potomac Falls, VA Updated: 8:11 PM EST |
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| Temperature: 48.2 °F | Dew Point: 38 °F | Humidity: 69% | Wind: Calm | Pressure: 29.81 in | Hourly Precipitation: 0.00 in | Windchill: 48 °F | Historical Graphs |
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Location: Belmont Country Club, Ashburn, VA Updated: 8:11 PM EST |
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| Temperature: 52.4 °F | Dew Point: 38 °F | Humidity: 58% | Wind: SE at 1.0 mph | Pressure: 30.11 in | Hourly Precipitation: 0.00 in | Windchill: - | Historical Graphs |
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Location: APRSWXNET Great Falls VA US, Sterling, VA Updated: 7:45 PM EST |
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| Temperature: 49 °F | Dew Point: 39 °F | Humidity: 69% | Wind: Calm | Pressure: 30.14 in | Hourly Precipitation: 0.00 in | Windchill: 49 °F | Historical Graphs |
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Location: Great Falls, Great Falls, VA Updated: 8:11 PM EST |
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| Temperature: 52.2 °F | Dew Point: 40 °F | Humidity: 63% | Wind: SE at 1.0 mph | Pressure: 30.12 in | Hourly Precipitation: 0.00 in | Windchill: - | Historical Graphs |
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Location: Ridings at Blue Springs, Chantilly, VA Updated: 8:06 PM EST |
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| Temperature: 50.0 °F | Dew Point: 39 °F | Humidity: 66% | Wind: Calm | Pressure: 30.13 in | Hourly Precipitation: 0.00 in | Windchill: - | Historical Graphs |
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Location: Cedar Cove Cluster, Reston, VA Updated: 8:10 PM EST |
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| Temperature: 50.2 °F | Dew Point: 39 °F | Humidity: 65% | Wind: Calm | Pressure: 30.10 in | Hourly Precipitation: 0.00 in | Windchill: - | Historical Graphs |
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Location: Brookfield, Chantilly, VA Updated: 8:00 PM EST |
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| Temperature: 55.2 °F | Dew Point: 29 °F | Humidity: 36% | Wind: SSE at 2.7 mph | Pressure: 29.62 in | Hourly Precipitation: 0.00 in | Windchill: - | Historical Graphs |
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Location: Lake Fairfax, Vienna, VA Updated: 8:11 PM EST |
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| Temperature: 42.7 °F | Dew Point: 37 °F | Humidity: 80% | Wind: Calm | Pressure: 29.88 in | Hourly Precipitation: 0.00 in | Windchill: 43 °F | Historical Graphs |
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Location: Hickory Creek, Great Falls, VA Updated: 8:11 PM EST |
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| Temperature: 45.8 °F | Dew Point: 38 °F | Humidity: 73% | Wind: Calm | Pressure: 30.07 in | Hourly Precipitation: 0.00 in | Windchill: 46 °F | Historical Graphs |
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Location: Kincaid Forest, Leesburg, VA Updated: 8:08 PM EST |
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| Temperature: 47.3 °F | Dew Point: 38 °F | Humidity: 70% | Wind: Calm | Pressure: 30.07 in | Hourly Precipitation: 0.00 in | Windchill: 47 °F | Historical Graphs |
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Location: Hawk Ridge Subdivision (South), Reston, VA Updated: 8:10 PM EST |
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| Temperature: 44.6 °F | Dew Point: 37 °F | Humidity: 74% | Wind: Calm | Pressure: 30.09 in | Hourly Precipitation: 0.00 in | Windchill: 45 °F | Historical Graphs |
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Location: APRSWXNET Great Falls VA US, Great Falls, VA Updated: 7:03 PM EST |
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| Temperature: 49 °F | Dew Point: 37 °F | Humidity: 64% | Wind: Calm | Pressure: 30.09 in | Hourly Precipitation: 0.00 in | Windchill: 49 °F | Historical Graphs |
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Location: VADOT Site_C, Oakton, VA Updated: 7:34 PM EST |
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| Temperature: 54 °F | Dew Point: 40 °F | Humidity: 57% | Wind: Calm | Pressure: - | Hourly Precipitation: 0.00 in | Windchill: - | Historical Graphs |
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Location: London Towne West II, Centreville, VA Updated: 6:41 PM EST |
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| Temperature: 53.5 °F | Dew Point: 36 °F | Humidity: 52% | Wind: Calm | Pressure: 30.13 in | Hourly Precipitation: 0.00 in | Windchill: - | Historical Graphs |
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Location: VADOT Site_E, Oakton, VA Updated: 7:36 PM EST |
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| Temperature: 54 °F | Dew Point: 40 °F | Humidity: 59% | Wind: Calm | Pressure: - | Hourly Precipitation: 0.00 in | Windchill: - | Historical Graphs |
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Location: Leesburg, VA Updated: 8:10 PM EST |
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| Temperature: 47.1 °F | Dew Point: 25 °F | Humidity: 42% | Wind: Calm | Pressure: 29.68 in | Hourly Precipitation: 0.00 in | Windchill: 47 °F | Historical Graphs |
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Location: Leesburg, VA, Leesburg, VA Updated: 8:11 PM EST |
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| Temperature: 43.5 °F | Dew Point: 36 °F | Humidity: 74% | Wind: Calm | Pressure: 30.10 in | Hourly Precipitation: 0.00 in | Windchill: 44 °F | Historical Graphs |
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Location: Downtown, Leesburg, VA Updated: 8:11 PM EST |
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| Temperature: 45.1 °F | Dew Point: 36 °F | Humidity: 71% | Wind: Calm | Pressure: 30.16 in | Hourly Precipitation: 0.00 in | Windchill: 45 °F | Historical Graphs |
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Location: Compass Rose Farm, Haymarket, VA Updated: 8:11 PM EST |
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| Temperature: 40.7 °F | Dew Point: 35 °F | Humidity: 81% | Wind: Calm | Pressure: 30.14 in | Hourly Precipitation: 0.00 in | Windchill: 41 °F | Historical Graphs |
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Location: Rosehaven Estates, Fairfax, VA Updated: 8:01 PM EST |
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| Temperature: 49.3 °F | Dew Point: 38 °F | Humidity: 66% | Wind: Calm | Pressure: 30.14 in | Hourly Precipitation: 0.00 in | Windchill: 49 °F | Historical Graphs |
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Location: Beulah-Wolf Trap, Vienna, VA Updated: 8:10 PM EST |
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| Temperature: 51.8 °F | Dew Point: 40 °F | Humidity: 63% | Wind: Calm | Pressure: 30.12 in | Hourly Precipitation: 0.00 in | Windchill: - | Historical Graphs |
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Location: TNG @ Centre Ridge, Centreville, VA Updated: 8:08 PM EST |
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| Temperature: 53.8 °F | Dew Point: 42 °F | Humidity: 64% | Wind: SSW at 2.0 mph | Pressure: 30.06 in | Hourly Precipitation: 0.00 in | Windchill: - | Historical Graphs |
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Location: VADOT Dulles_Toll_Rd_E_Plaza, Vienna, VA Updated: 7:30 PM EST |
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| Temperature: 55 °F | Dew Point: 37 °F | Humidity: 52% | Wind: SSW at 1 mph | Pressure: - | Hourly Precipitation: 0.00 in | Windchill: - | Historical Graphs |
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MSN Maps of: |
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| Temperature | Dew Point | Humidity | Wind | Pressure | Hourly Precipitation | - | |
NWS Forecaster Discussion
047 fxus61 klwx 072000 afdlwx Area forecast discussion National Weather Service Baltimore Maryland/Washington District of Columbia 300 PM EST Sat Nov 7 2009 Synopsis... high pressure will dominate the weather through early next week. A weak pressure trough will bring a wind shift to the area tomorrow...but will have little effect on temperatures. The next cold front will approach the region late Tuesday into Wednesday. && Near term /through tonight/... hipres centered just off the Carolina coast will slowly build southeastward but remain in control of the middle Atlantic weather pattern. A very weak low level shortwave and surface pressure trough will move through the region late tonight. Westerly flow aloft will advect warmer air from the c Continental U.S. Into the region...resulting in a fairly strong thermal inversion in the first 3 kft above the ground. This inversion combined with mixing...especially across higher elevations of the Blue Ridge and Potomac Highlands...will result in much higher min temperatures compared to cooler sheltered valleys. Forecast lows range from around 40f in locations below 1 kft to near 50f for elevations at or above 2 kft. && Short term /Sunday/... aforementioned weak surface pressure trough will push through by the early in the period. Surface flow will shift northwesterly in wake of trough but will become light as hipres ridge settles ovrhd. With mostly sunny skies and a warmer airmass in place...maximum temperatures will generally be in the mu60s with a few spots climbing into the l70s. && Long term /Sunday night through Saturday/... high pressure will remain the dominant weather feature across the County warning forecast area through early Tuesday. A cold front is still prognosticated to move through the middle Atlantic region late Tuesday into early Wednesday. The GFS is now bringing moisture northward from the Gulf of Mexico ahead of the front. There is a wide spread between guidance numbers for this period...so will opt to go with persistence and keep the slight chance probability of precipitation in the forecast for now. High pressure builds back in for the remainder of the week into the early part of the weekend. Looks like until the frontal passage late Tuesday/early Wednesday temperatures in the higher elevations could remain a bit higher than the valleys. Also...breezy conditions are anticipated behind this front Wednesday and even into early Thursday. && Aviation /20z Saturday through Thursday/... VFR conditions tonight and sun. Southerly winds around 5-10 knots with a few gusts to 15 knots will relax towards sunset. A subtle pressure trough will push through overnight...shifting the winds west-northwesterly sun. No restrictions to visibility/ceilings are expected through early next week. A cold front is expected late Tuesday/early Wednesday. Not much precipitation can is expected with this boundary...but breezy conditions are possible Wednesday into Thursday. && Marine... Small Craft Advisory has been extended through 02z this evening in the Maryland chesepeake Bay and lower tidal Potomac. Southerly channeling will prolong 20 knots gust potential through the evening before the winds relax late this evening. Winds will become light overnight into sun as hipres settles ovrhd. Some channeling up the Bay is possible later Tuesday ahead of an approaching cold front...and gust potential may approach small craft criteria. Small craft conditions are likely behind the front Wednesday into Thursday. Will have to continue to monitor...winds aloft could be strong enough for a brief period of gales during this period. && Lwx watches/warnings/advisories... District of Columbia...none. Maryland...none. Virginia...none. WV...none. Marine...Small Craft Advisory until 9 PM EST this evening for anz530>534-537>543. && $$ Klein/listemaa