Weather in Herndon, Virginia, United States
7-Day Forecast Summary
7-Day Detailed Weather Forecast for Herndon
Today |
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Temperature: 97°F Wind Speed: 3 to 7 mph Wind Direction: W Forecast: Mostly sunny, with a high near 97. Heat index values as high as 102. West wind 3 to 7 mph. |
Tonight |
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Temperature: 72°F Wind Speed: 7 mph Wind Direction: NW Forecast: A slight chance of showers and thunderstorms before 10pm, then areas of smoke. Mostly clear, with a low around 72. Northwest wind around 7 mph. Chance of precipitation is 20%. |
Friday |
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Temperature: 92°F Wind Speed: 3 mph Wind Direction: N Forecast: Areas of smoke. Mostly sunny, with a high near 92. North wind around 3 mph. |
Friday Night |
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Temperature: 74°F Wind Speed: 5 mph Wind Direction: SE Forecast: Areas of smoke before 2am, then areas of smoke and a chance of showers and thunderstorms. Partly cloudy, with a low around 74. Southeast wind around 5 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible. |
Saturday |
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Temperature: 91°F Wind Speed: 5 to 10 mph Wind Direction: S Forecast: A chance of showers and thunderstorms before 2pm, then showers and thunderstorms. Mostly cloudy, with a high near 91. South wind 5 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 90%. |
Saturday Night |
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Temperature: 72°F Wind Speed: 7 mph Wind Direction: SW Forecast: Showers and thunderstorms. Mostly cloudy, with a low around 72. Chance of precipitation is 90%. |
Sunday |
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Temperature: 87°F Wind Speed: 7 to 10 mph Wind Direction: NW Forecast: A chance of rain showers before 8am, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 87. Chance of precipitation is 30%. |
Sunday Night |
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Temperature: 66°F Wind Speed: 3 to 8 mph Wind Direction: N Forecast: A slight chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 66. Chance of precipitation is 20%. |
Monday |
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Temperature: 87°F Wind Speed: 6 mph Wind Direction: E Forecast: Sunny, with a high near 87. |
Monday Night |
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Temperature: 69°F Wind Speed: 6 mph Wind Direction: S Forecast: Partly cloudy, with a low around 69. |
Tuesday |
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Temperature: 90°F Wind Speed: 6 to 10 mph Wind Direction: SW Forecast: A chance of showers and thunderstorms after 8am. Partly sunny, with a high near 90. Chance of precipitation is 40%. |
Tuesday Night |
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Temperature: 69°F Wind Speed: 6 to 10 mph Wind Direction: W Forecast: A chance of showers and thunderstorms before 8pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 69. Chance of precipitation is 60%. |
Wednesday |
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Temperature: 87°F Wind Speed: 7 to 10 mph Wind Direction: NW Forecast: A slight chance of rain showers before 2pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 87. Chance of precipitation is 30%. |
Wednesday Night |
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Temperature: 67°F Wind Speed: 5 to 9 mph Wind Direction: N Forecast: A chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 67. |