Weather in Herndon, Virginia, United States
7-Day Forecast Summary
7-Day Detailed Weather Forecast for Herndon
Overnight |
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Temperature: 71°F Wind Speed: 1 mph Wind Direction: SW Forecast: Isolated rain showers between 2am and 5am. Mostly cloudy, with a low around 71. Southwest wind around 1 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible. |
Monday |
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Temperature: 91°F Wind Speed: 1 to 7 mph Wind Direction: S Forecast: A slight chance of rain showers between 11am and noon, then showers and thunderstorms likely between noon and 4pm, then showers and thunderstorms likely between 4pm and 5pm, then showers and thunderstorms likely. Partly sunny, with a high near 91. Heat index values as high as 100. South wind 1 to 7 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible. |
Monday Night |
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Temperature: 75°F Wind Speed: 8 mph Wind Direction: S Forecast: Showers and thunderstorms likely before 8pm, then a slight chance of showers and thunderstorms between 8pm and midnight. Mostly cloudy, with a low around 75. South wind around 8 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible. |
Tuesday |
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Temperature: 90°F Wind Speed: 10 mph Wind Direction: SW Forecast: A chance of rain showers between 8am and 11am, then showers and thunderstorms. Some of the storms could produce heavy rain. Mostly sunny, with a high near 90. Southwest wind around 10 mph, with gusts as high as 18 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible. |
Tuesday Night |
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Temperature: 69°F Wind Speed: 5 to 8 mph Wind Direction: W Forecast: Showers and thunderstorms before 8pm, then a chance of showers and thunderstorms. Some of the storms could produce heavy rain. Mostly cloudy, with a low around 69. West wind 5 to 8 mph. Chance of precipitation is 90%. |
Wednesday |
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Temperature: 87°F Wind Speed: 6 mph Wind Direction: NW Forecast: A slight chance of rain showers before 8am. Sunny, with a high near 87. Chance of precipitation is 20%. |
Wednesday Night |
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Temperature: 69°F Wind Speed: 3 mph Wind Direction: NW Forecast: Mostly clear, with a low around 69. |
Thursday |
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Temperature: 88°F Wind Speed: 2 to 6 mph Wind Direction: NW Forecast: Sunny, with a high near 88. |
Thursday Night |
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Temperature: 67°F Wind Speed: 6 mph Wind Direction: NW Forecast: Mostly clear, with a low around 67. |
Independence Day |
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Temperature: 86°F Wind Speed: 6 mph Wind Direction: N Forecast: Sunny, with a high near 86. |
Friday Night |
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Temperature: 65°F Wind Speed: 5 mph Wind Direction: N Forecast: Mostly clear, with a low around 65. |
Saturday |
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Temperature: 89°F Wind Speed: 2 to 6 mph Wind Direction: S Forecast: Mostly sunny, with a high near 89. |
Saturday Night |
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Temperature: 69°F Wind Speed: 6 mph Wind Direction: S Forecast: Partly cloudy, with a low around 69. |
Sunday |
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Temperature: 93°F Wind Speed: 5 to 8 mph Wind Direction: SW Forecast: A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 93. |