10-Day Weather Forecast - Port Costa, CA

Partly cloudy in the morning then becoming sunny. Highs in the mid 70s to lower 80s. West winds 5 to 15 mph.

Clear in the evening then becoming partly cloudy. Lows in the mid 50s. Southwest winds 5 to 15 mph.

Partly cloudy in the morning then becoming sunny. Highs in the 80s. West winds 5 to 15 mph.

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

Partly cloudy in the morning then becoming sunny. Highs in the 80s.

Mostly clear. Lows in the upper 50s. Highs in the mid 80s to lower 90s.

Mostly clear. Lows in the upper 50s. Highs in the mid 80s to lower 90s.

Clear. Lows in the upper 50s.

Sunny. Highs near 90.

Clear. Lows in the upper 50s.

Sunny. Highs in the mid 80s to lower 90s.

Clear. Lows in the upper 50s.

Sunny. Highs in the upper 80s.

Clear. Low temperature around 57F. Dew point will be around 52F with an average humidity of 73%. Winds will be 11 mph from the SW.

Sunny. High temperature around 74F. Dew point will be around 55F with an average humidity of 60%. Winds will be 10 mph from the SW.

Clear. Low temperature around 56F. Dew point will be around 53F with an average humidity of 74%. Winds will be 12 mph from the SW.

Sunny. High temperature around 75F. Dew point will be around 54F with an average humidity of 58%. Winds will be 9 mph from the SW.

Clear. Low temperature around 56F. Dew point will be around 52F with an average humidity of 73%. Winds will be 11 mph from the SW.