Weather in Herndon, Virginia, United States
7-Day Forecast Summary
7-Day Detailed Weather Forecast for Herndon
Overnight |
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Temperature: 75°F Wind Speed: 8 mph Wind Direction: SW Forecast: Mostly cloudy, with a low around 75. Southwest wind around 8 mph. |
Thursday |
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Temperature: 96°F Wind Speed: 7 to 12 mph Wind Direction: SW Forecast: A slight chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 96. Heat index values as high as 105. Southwest wind 7 to 12 mph, with gusts as high as 20 mph. Chance of precipitation is 20%. |
Thursday Night |
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Temperature: 74°F Wind Speed: 6 to 12 mph Wind Direction: W Forecast: A slight chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 74. Heat index values as high as 101. West wind 6 to 12 mph, with gusts as high as 18 mph. Chance of precipitation is 20%. |
Friday |
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Temperature: 88°F Wind Speed: 7 mph Wind Direction: NW Forecast: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 88. Northwest wind around 7 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch possible. |
Friday Night |
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Temperature: 72°F Wind Speed: 5 mph Wind Direction: NE Forecast: A chance of showers and thunderstorms before 11pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Northeast wind around 5 mph. Chance of precipitation is 30%. |
Saturday |
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Temperature: 85°F Wind Speed: 2 to 6 mph Wind Direction: SE Forecast: A chance of rain showers before 11am, then showers and thunderstorms likely. Mostly cloudy, with a high near 85. Chance of precipitation is 70%. |
Saturday Night |
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Temperature: 72°F Wind Speed: 6 mph Wind Direction: SW Forecast: Showers and thunderstorms likely before 8pm, then a chance of showers and thunderstorms between 8pm and 11pm, then a chance of showers and thunderstorms between 11pm and 2am. Mostly cloudy, with a low around 72. Chance of precipitation is 70%. |
Sunday |
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Temperature: 90°F Wind Speed: 3 to 7 mph Wind Direction: W Forecast: A slight chance of rain showers between 8am and 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 90. Chance of precipitation is 50%. |
Sunday Night |
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Temperature: 69°F Wind Speed: 7 mph Wind Direction: NW Forecast: A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 69. Chance of precipitation is 50%. |
Monday |
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Temperature: 85°F Wind Speed: 6 mph Wind Direction: N Forecast: A slight chance of rain showers after 2pm. Mostly sunny, with a high near 85. |
Monday Night |
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Temperature: 67°F Wind Speed: 6 mph Wind Direction: NE Forecast: A slight chance of rain showers before 2am. Partly cloudy, with a low around 67. |
Tuesday |
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Temperature: 86°F Wind Speed: 3 to 7 mph Wind Direction: E Forecast: A slight chance of rain showers after 2pm. Mostly sunny, with a high near 86. |
Tuesday Night |
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Temperature: 68°F Wind Speed: 7 mph Wind Direction: S Forecast: A slight chance of rain showers before 8pm, then a slight chance of showers and thunderstorms. Partly cloudy, with a low around 68. |
Wednesday |
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Temperature: 90°F Wind Speed: 7 mph Wind Direction: S Forecast: A slight chance of rain showers before 8am, then a chance of showers and thunderstorms. Mostly sunny, with a high near 90. |