10-Day Weather Forecast - Port Costa, CA

Mostly cloudy. Highs around 80. West winds 5 to 10 mph.

Mostly cloudy. A slight chance of rain after midnight. Lows in the 50s. West winds 5 to 10 mph.

Mostly cloudy. A slight chance of rain in the morning then a chance of rain in the afternoon. Highs around 70. Southwest winds 5 to 10 mph. Chance of rain 40 percent.

Mostly cloudy in the evening then becoming partly cloudy. A chance of rain in the evening then a slight chance of rain after midnight. Lows near 50. Southwest winds 5 to 10 mph. Chance of rain 40 percent.

Mostly cloudy. A chance of rain. Highs around 70.

Mostly cloudy. A chance of rain. Lows in the mid 40s to lower 50s.

Partly cloudy in the morning then becoming sunny. A slight chance of rain. Highs in the mid 60s.

Clear. Lows in the 40s. Highs in the upper 70s.

Clear. Lows in the 40s. Highs in the upper 70s.

Clear. Lows in the 40s. Highs in the upper 70s.

Clear. Lows in the 40s. Highs in the upper 70s.

Clear. Lows in the 40s. Highs in the upper 70s.

Sunny. Highs in the lower 80s.

Mostly clear. Low temperature around 49F. Dew point will be around 47F with an average humidity of 75%. Winds will be 8 mph from the W.

Sunny. High temperature around 71F. Dew point will be around 51F with an average humidity of 60%. Winds will be 7 mph from the W.

Clear. Low temperature around 47F. Dew point will be around 48F with an average humidity of 81%. Winds will be 9 mph from the W.

Sunny. High temperature around 68F. Dew point will be around 50F with an average humidity of 63%. Winds will be 7 mph from the W.

Clear. Low temperature around 46F. Dew point will be around 47F with an average humidity of 80%. Winds will be 8 mph from the W.