10-Day Weather Forecast - Diamond Bar, CA

Partly cloudy. A 20 percent chance of rain in the morning. Highs in the mid to upper 60s. Southwest winds around 15 mph in the afternoon.

Partly cloudy in the evening then mostly cloudy. Lows around 50. Southwest winds around 15 mph in the evening.

Partly cloudy in the morning then sunny. Highs in the mid 60s to around 70.

Mostly clear. Lows around 50.

Sunny. Highs in the mid to upper 70s.

Mostly clear. Lows in the lower 50s.

Sunny. Highs in the mid to upper 70s.

Partly cloudy. Lows in the lower to mid 50s.

Partly cloudy in the morning then sunny. Highs in the mid 70s.

Mostly clear. Lows in the mid 50s.

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

Mostly clear. Low temperature around 55F. Dew point will be around 54F with an average humidity of 83%. Winds will be 5 mph from the SW.

Sunny. High temperature around 80F. Dew point will be around 54F with an average humidity of 56%. Winds will be 6 mph from the SW.

Mostly clear. Low temperature around 54F. Dew point will be around 54F with an average humidity of 81%. Winds will be 5 mph from the SW.

Mostly sunny. High temperature around 71F. Dew point will be around 54F with an average humidity of 63%. Winds will be 7 mph from the SW.

Partly cloudy. Low temperature around 53F. Dew point will be around 53F with an average humidity of 84%. Winds will be 6 mph from the SW.

Partly cloudy. High temperature around 69F. Dew point will be around 53F with an average humidity of 65%. Winds will be 7 mph from the SW.

Mostly cloudy. Low temperature around 53F. Dew point will be around 53F with an average humidity of 84%. Winds will be 5 mph from the SW.