10-Day Weather Forecast - Port Costa, CA

Sunny. Highs in the upper 70s. West winds 5 to 15 mph.

Mostly clear. Lows in the upper 40s. Southwest winds 5 to 15 mph.

Sunny. Highs in the lower 80s. West winds 5 to 10 mph.

Mostly clear. Lows in the lower 50s. Southwest winds 5 to 15 mph.

Partly cloudy in the morning then becoming sunny. Highs in the upper 70s to mid 80s.

Partly cloudy. Lows in the lower 50s. Highs in the 70s.

Partly cloudy. Lows in the lower 50s. Highs in the 70s.

Partly cloudy. Lows in the lower 50s. Highs in the 70s.

Partly cloudy. Lows in the lower 50s. Highs in the 70s.

Partly cloudy. Lows in the lower 50s. Highs in the 70s.

Partly cloudy. A slight chance of rain. Highs in the lower 70s. Lows in the lower 50s.

Partly cloudy. A slight chance of rain. Highs in the lower 70s. Lows in the lower 50s.

Mostly cloudy in the morning then becoming partly cloudy. A slight chance of rain. Highs in the lower 70s.

Clear. Low temperature around 50F. Dew point will be around 46F with an average humidity of 80%. Winds will be 8 mph from the SW.

Mostly cloudy. High temperature around 63F. Dew point will be around 49F with an average humidity of 69%. Winds will be 9 mph from the SW.

Clear. Low temperature around 49F. Dew point will be around 47F with an average humidity of 81%. Winds will be 9 mph from the SW.

Sunny. High temperature around 66F. Dew point will be around 50F with an average humidity of 65%. Winds will be 9 mph from the SW.

Mostly clear. Low temperature around 49F. Dew point will be around 47F with an average humidity of 76%. Winds will be 9 mph from the SW.