10-Day Weather Forecast - Port Costa, CA

Partly cloudy in the morning then becoming sunny. Highs around 90. West winds 5 to 10 mph.

Partly cloudy. Lows around 60. Southwest winds 5 to 10 mph.

Partly cloudy in the morning then becoming sunny. Highs around 90. West winds 5 to 10 mph.

Mostly clear in the evening then becoming partly cloudy. Lows around 60.

Partly cloudy. Highs in the 80s.

Partly cloudy. Lows around 60.

Partly cloudy. Highs in the 80s.

Mostly clear. Lows in the upper 50s.

Mostly clear. Highs in the 80s.

Mostly clear. Lows in the upper 50s.

Mostly clear. Highs in the 80s.

Clear. Low temperature around 56F. Dew point will be around 54F with an average humidity of 78%. Winds will be 11 mph from the SW.

Sunny. High temperature around 74F. Dew point will be around 55F with an average humidity of 68%. Winds will be 11 mph from the SW.

Clear. Low temperature around 54F. Dew point will be around 54F with an average humidity of 85%. Winds will be 11 mph from the SW.

Sunny. High temperature around 73F. Dew point will be around 55F with an average humidity of 66%. Winds will be 10 mph from the SW.

Clear. Low temperature around 54F. Dew point will be around 54F with an average humidity of 82%. Winds will be 11 mph from the SW.

Sunny. High temperature around 74F. Dew point will be around 55F with an average humidity of 63%. Winds will be 10 mph from the SW.

Clear. Low temperature around 54F. Dew point will be around 55F with an average humidity of 83%. Winds will be 11 mph from the SW.