10-Day Weather Forecast - Diamond Bar, CA

Low clouds and fog in the morning then sunny. Highs in the mid to upper 70s.

Clear in the evening then low clouds and fog. Lows in the mid to upper 50s.

Low clouds and fog. Highs in the lower to mid 70s.

Mostly cloudy with a 20 percent chance of rain. Lows in the mid 50s.

Mostly cloudy in the morning then sunny. Highs in the lower to mid 70s.

Partly cloudy. Lows in the mid 50s.

Mostly cloudy in the morning then partly cloudy. Highs in the upper 60s to mid 70s.

Partly cloudy. Lows in the lower 50s.

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

Mostly clear. Lows in the mid 50s.

Sunny. Highs in the lower 80s.

Clear. Lows in the mid 50s.

Sunny. Highs in the mid 80s.

Clear. Low temperature around 54F. Dew point will be around 49F with an average humidity of 68%. Winds will be 4 mph from the SW.

Sunny. High temperature around 73F. Dew point will be around 51F with an average humidity of 56%. Winds will be 7 mph from the SW.

Clear. Low temperature around 52F. Dew point will be around 51F with an average humidity of 78%. Winds will be 5 mph from the SW.

Sunny. High temperature around 72F. Dew point will be around 52F with an average humidity of 61%. Winds will be 7 mph from the SW.

Clear. Low temperature around 52F. Dew point will be around 51F with an average humidity of 79%. Winds will be 4 mph from the SW.