10-Day Weather Forecast - Herndon, VA

Sunny in the morning, then partly sunny with a chance of showers and thunderstorms in the afternoon. Some thunderstorms may produce gusty winds and heavy rainfall in the afternoon. Hot with highs in the lower 90s. West winds 5 to 10 mph. Chance of rain 50 percent.

Mostly cloudy. A chance of showers and thunderstorms in the evening, then a chance of showers after midnight. Some thunderstorms may produce gusty winds and heavy rainfall in the evening. Lows in the lower 70s. Northwest winds around 5 mph. Chance of rain 50 percent.

Partly sunny. A chance of showers in the afternoon. Highs in the mid 80s. North winds around 5 mph. Chance of rain 40 percent.

Partly cloudy. A chance of showers in the evening. Lows in the mid 60s. Northeast winds around 5 mph. Chance of rain 40 percent.

Sunny. Highs in the lower 80s.

Mostly clear. Lows in the lower 60s.

Sunny. Highs in the lower 80s.

Mostly clear. Lows in the lower 60s.

Mostly sunny. Highs in the mid 80s.

Partly cloudy. Lows in the lower 60s.

Mostly sunny. Highs in the upper 80s.

Partly cloudy. Lows in the lower 70s.

Mostly sunny. Hot with highs around 90.

Mostly clear with a 40% chance for rain and thunderstorms. Low temperature around 71F. Dew point will be around 70F with an average humidity of 84%. Winds will be 3 mph from the W.

Partly cloudy with a slight chance of rain. Chance of precipitation 25%. High temperature around 82F. Dew point will be around 69F with an average humidity of 77%. Winds will be 4 mph from the NW.

Partly cloudy with a slight chance of rain. Chance of precipitation 30%. Low temperature around 67F. Dew point will be around 66F with an average humidity of 88%. Winds will be 2 mph from the NW.

Mostly sunny. High temperature around 79F. Dew point will be around 67F with an average humidity of 79%. Winds will be 2 mph from the NW.

Clear. Low temperature around 66F. Dew point will be around 65F with an average humidity of 86%. Winds will be 2 mph from the S.