10-Day Weather Forecast - Diamond Bar, CA

Sunny. Highs around 70.

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

Sunny. Highs in the mid 60s to around 70.

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

Sunny. Highs in the lower to mid 70s.

Clear. Lows in the lower 50s.

Sunny. Highs in the mid 70s to around 80.

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

Sunny. Highs in the lower 80s.

Mostly clear. Lows in the mid 50s.

Partly cloudy in the morning then sunny. Highs in the lower 80s.

Clear. Lows in the mid 50s.

Sunny. Highs around 80.

Clear. Low temperature around 54F. Dew point will be around 42F with an average humidity of 55%. Winds will be 4 mph from the E.

Sunny. High temperature around 74F. Dew point will be around 42F with an average humidity of 38%. Winds will be 4 mph from the SW.

Clear. Low temperature around 53F. Dew point will be around 44F with an average humidity of 61%. Winds will be 4 mph from the E.

Sunny. High temperature around 71F. Dew point will be around 44F with an average humidity of 44%. Winds will be 5 mph from the SW.

Mostly clear. Low temperature around 51F. Dew point will be around 44F with an average humidity of 65%. Winds will be 4 mph from the E.