10-Day Weather Forecast - Diamond Bar, CA

Mostly cloudy. A 50 percent chance of rain in the afternoon. Highs in the upper 60s to mid 70s. Southwest winds around 15 mph in the afternoon.

Rain likely in the evening becoming partly cloudy after midnight. Lows in the mid 40s to lower 50s. Chance of precipitation 70 percent.

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

Mostly clear. Lows in the lower 50s.

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 lower to mid 70s.

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

Mostly cloudy in the morning then partly cloudy. Highs around 70.

Partly cloudy in the evening then mostly cloudy. Lows in the lower to mid 50s.

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

Partly cloudy. Low temperature around 52F. Dew point will be around 52F with an average humidity of 94%. Winds will be 6 mph from the SW.

Mostly cloudy. High temperature around 69F. Dew point will be around 53F with an average humidity of 69%. Winds will be 6 mph from the SW.

Mostly clear. Low temperature around 52F. Dew point will be around 53F with an average humidity of 89%. Winds will be 4 mph from the SW.

Mostly cloudy. High temperature around 71F. Dew point will be around 53F with an average humidity of 65%. Winds will be 7 mph from the SW.

Mostly clear. Low temperature around 53F. Dew point will be around 53F with an average humidity of 87%. Winds will be 5 mph from the SW.

Partly cloudy. High temperature around 72F. Dew point will be around 51F with an average humidity of 60%. Winds will be 7 mph from the SW.

Clear. Low temperature around 53F. Dew point will be around 53F with an average humidity of 84%. Winds will be 4 mph from the SW.