10-Day Weather Forecast - Diamond Bar, CA

Sunny. Highs in the lower to mid 80s.

Clear. Lows in the mid 40s to mid 50s.

Sunny. Highs in the lower to mid 80s.

Clear. Lows in the upper 30s and 40s except the lower to mid 50s in the hills.

Sunny. Highs in the lower to mid 80s.

Clear. Lows in the mid 40s to mid 50s.

Sunny. Highs in the lower to mid 80s.

Mostly clear. Lows in the lower to mid 50s.

Sunny. Highs in the mid to upper 70s.

Mostly clear. Lows in the lower to mid 50s.

Sunny. Highs in the mid 70s.

Mostly clear in the evening then areas of low clouds and fog. Lows in the lower 50s.

Low clouds and fog in the morning then partly cloudy. Highs in the mid 70s.

Partly cloudy. Low temperature around 51F. Dew point will be around 44F with an average humidity of 65%. Winds will be 5 mph from the S.

Mostly sunny. High temperature around 63F. Dew point will be around 46F with an average humidity of 61%. Winds will be 7 mph from the S.

Cloudy. Low temperature around 49F. Dew point will be around 49F with an average humidity of 88%. Winds will be 7 mph from the S.

Cloudy. High temperature around 58F. Dew point will be around 48F with an average humidity of 76%. Winds will be 8 mph from the S.

Mostly cloudy. Low temperature around 46F. Dew point will be around 46F with an average humidity of 89%. Winds will be 6 mph from the S.