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NWS Baltimore, MD/Washington, D.C.
 Point Forecast: Herndon VA
 38.97°N 77.41°W
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Last Update: 7:10 pm EST Nov 21, 2009
Forecast Valid: 11pm EST Nov 21, 2009-6pm EST Nov 28, 2009
Forecast at a Glance
Overnight

Patchy Fog
Patchy
Fog
Lo 37 °F
Sunday

Patchy Fog
Patchy
Fog
Hi 57 °F
Sunday
Night

Slight Chance Rain Chance for Measurable Precipitation 20%
Slight Chc
Rain
Lo 42 °F
Monday

Rain Likely Chance for Measurable Precipitation 60%
Rain
Likely
Hi 50 °F
Monday
Night

Chance Rain Chance for Measurable Precipitation 50%
Chance
Rain
Lo 45 °F
Tuesday

Slight Chance Rain Chance for Measurable Precipitation 20%
Slight Chc
Rain
Hi 56 °F
Tuesday
Night

Chance Showers Chance for Measurable Precipitation 30%
Chance
Showers
Lo 45 °F
Wednesday

Chance Showers Chance for Measurable Precipitation 30%
Chance
Showers
Hi 61 °F
Wednesday
Night

Chance Showers Chance for Measurable Precipitation 50%
Chance
Showers
Lo 42 °F

Detailed text forecast
Overnight: Patchy fog after midnight. Otherwise, partly cloudy, with a low around 37. North wind between 3 and 5 mph.

Sunday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 57. North wind between 5 and 7 mph.

Sunday Night: A slight chance of rain after midnight. Mostly cloudy, with a low around 42. Northeast wind around 6 mph. Chance of precipitation is 20%.

Monday: Rain likely, mainly after 9am. Cloudy, with a high near 50. North wind between 7 and 9 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch possible.

Monday Night: A chance of rain. Cloudy, with a low around 45. North wind around 8 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch possible.

Tuesday: A slight chance of rain before 1pm. Mostly cloudy, with a high near 56. Chance of precipitation is 20%.

Tuesday Night: A chance of showers. Mostly cloudy, with a low around 45. Chance of precipitation is 30%.

Wednesday: A chance of showers. Mostly cloudy, with a high near 61. Chance of precipitation is 30%.

Wednesday Night: A chance of showers. Mostly cloudy, with a low around 42. Chance of precipitation is 50%.

Thanksgiving Day: A chance of showers. Cloudy, with a high near 57. Chance of precipitation is 40%.

Thursday Night: A chance of showers. Mostly cloudy, with a low around 38. Chance of precipitation is 30%.

Friday: Mostly cloudy, with a high near 49.

Friday Night: Mostly cloudy, with a low around 33.

Saturday: Sunny, with a high near 52.


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Lat/Lon: 38.97°N 77.41°W   Elevation:348 ft
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view Yesterday's Weather

Washington-Dulles International Airport
Lat: 38.96   Lon: -77.45   Elev: 290
Last Update on Nov 21, 9:52 pm EST

Fair

46 °F
(8 °C)
Humidity: 79 %
Wind Speed: Calm
Barometer: 30.20" (1022.6 mb)
Dewpoint: 40 °F (4 °C)
Visibility: 10.00 mi.
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