10-Day Weather Forecast - Herndon, VA

Partly sunny in the morning then becoming mostly cloudy. Highs in the lower 40s. Southwest winds around 5 mph becoming south around 5 mph in the afternoon.

Partly cloudy. Lows in the upper 20s. Southwest winds around 5 mph becoming northwest with gusts up to 20 mph after midnight.

Mostly sunny. Highs in the mid 30s. North winds around 10 mph with gusts up to 20 mph.

Partly cloudy. Lows around 20.

Mostly sunny. Highs in the upper 30s.

Mostly cloudy. Lows around 30.

Mostly cloudy. Highs in the upper 40s.

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

Partly sunny. Highs in the mid 40s.

Mostly cloudy with a chance of rain and snow. Lows in the upper 20s. Chance of precipitation 40 percent.

Partly sunny. Highs around 40.

Mostly clear. Low temperature around 22F. Dew point will be around 15F with an average humidity of 61%. Winds will be 10 mph from the NW.

Sunny. High temperature around 27F. Dew point will be around 5F with an average humidity of 42%. Winds will be 14 mph from the NW.

Clear. Low temperature around 17F. Dew point will be around 3F with an average humidity of 48%. Winds will be 12 mph from the NW.

Sunny. High temperature around 27F. Dew point will be around 3F with an average humidity of 42%. Winds will be 11 mph from the NW.

Clear. Low temperature around 21F. Dew point will be around 7F with an average humidity of 52%. Winds will be 8 mph from the W.

Sunny. High temperature around 34F. Dew point will be around 12F with an average humidity of 48%. Winds will be 7 mph from the W.

Clear. Low temperature around 23F. Dew point will be around 11F with an average humidity of 55%. Winds will be 6 mph from the NW.