10-Day Weather Forecast - Diamond Bar, CA

Partly cloudy. Highs in the lower to mid 80s.

Mostly clear in the evening then partly cloudy. Lows in the upper 50s to mid 60s.

Partly cloudy in the morning then sunny. Patchy fog in the morning. Highs in the 80s to around 90.

Mostly clear. Lows in the upper 50s to mid 60s.

Partly cloudy in the morning then sunny. Highs in the mid 80s to lower 90s.

Mostly clear. Lows in the lower to mid 60s.

Partly cloudy in the morning then sunny. Highs in the upper 80s to mid 90s.

Mostly clear. Lows in the mid 60s.

Partly cloudy in the morning then sunny. Highs in the upper 80s to mid 90s.

Mostly clear. Lows in the lower to mid 60s.

Partly cloudy. Highs in the mid 80s to around 90.

Mostly clear in the evening then partly cloudy. Lows in the lower to mid 60s.

Mostly cloudy in the morning then partly cloudy. Highs in the 80s to around 90.

Clear. Low temperature around 67F. Dew point will be around 59F with an average humidity of 65%. Winds will be 6 mph from the SW.

Sunny. High temperature around 89F. Dew point will be around 62F with an average humidity of 53%. Winds will be 8 mph from the SW.

Mostly clear. Low temperature around 71F. Dew point will be around 61F with an average humidity of 60%. Winds will be 5 mph from the SW.

Mostly sunny. High temperature around 93F. Dew point will be around 65F with an average humidity of 50%. Winds will be 7 mph from the SW.

Clear. Low temperature around 73F. Dew point will be around 62F with an average humidity of 60%. Winds will be 5 mph from the SW.