10-Day Weather Forecast - Herndon, VA

Mostly sunny. A slight chance of rain and snow showers in the afternoon. Highs in the mid 40s. Northwest winds around 10 mph with gusts up to 30 mph becoming west 15 to 20 mph with gusts up to 40 mph in the afternoon. Chance of precipitation 20 percent.

Mostly clear. Lows in the upper 20s. Northwest winds 15 to 20 mph. Gusts up to 40 mph decreasing to 30 mph after midnight.

Sunny. Highs in the mid 40s. West winds 5 to 10 mph.

Mostly clear. Lows in the upper 20s.

Mostly sunny. Highs around 50.

Mostly cloudy. Lows around 40.

Mostly cloudy. Highs in the lower 50s.

Mostly cloudy with a 30 percent chance of rain. Lows in the upper 20s.

Mostly sunny with a chance of rain. Highs in the upper 30s. Chance of rain 30 percent.

Partly cloudy. Lows in the lower 20s.

Mostly sunny. Highs in the upper 30s.

Mostly clear. Low temperature around 5F. Dew point will be around 11F with an average humidity of 83%. Winds will be 5 mph from the S.

Cloudy. High temperature around 42F. Dew point will be around 26F with an average humidity of 63%. Winds will be 5 mph from the SW.

Cloudy. Low temperature around 28F. Dew point will be around 23F with an average humidity of 74%. Winds will be 5 mph from the NW.

Cloudy with a slight chance of rain-snow mix. Chance of precipitation 25%. High temperature around 33F. Dew point will be around 19F with an average humidity of 63%. Winds will be 7 mph from the NW.

Partly cloudy. Low temperature around 20F. Dew point will be around 12F with an average humidity of 67%. Winds will be 10 mph from the NW.

Sunny. High temperature around 30F. Dew point will be around 11F with an average humidity of 53%. Winds will be 10 mph from the NW.

Clear. Low temperature around 18F. Dew point will be around 10F with an average humidity of 64%. Winds will be 6 mph from the W.