10-Day Weather Forecast - Port Costa, CA

Partly cloudy. Patchy dense fog in the morning. Highs in the upper 50s to mid 60s. Northeast winds around 5 mph.

Mostly clear in the evening then becoming partly cloudy. Areas of fog in the evening. Patchy fog after midnight. Lows around 40. Light winds.

Mostly cloudy. Patchy fog in the morning. Highs in the lower 60s. Northeast winds 5 to 10 mph.

Mostly cloudy. Patchy fog after midnight. Lows in the lower 40s. Light winds.

Mostly cloudy. Highs in the lower 60s.

Mostly cloudy. Lows in the mid 40s.

Partly cloudy. Patchy fog. Highs in the lower 60s. Lows in the lower 40s.

Partly cloudy. Patchy fog. Highs in the lower 60s. Lows in the lower 40s.

Partly cloudy. Patchy fog. Highs in the lower 60s. Lows in the lower 40s.

Partly cloudy. Patchy fog. Highs in the lower 60s. Lows in the lower 40s.

Mostly cloudy. Patchy fog. Highs around 60. Lows in the lower 40s.

Mostly cloudy. Patchy fog. Highs around 60. Lows in the lower 40s.

Mostly cloudy in the morning then becoming partly cloudy. Patchy fog. Highs around 60.

Mostly clear. Low temperature around 44F. Dew point will be around 42F with an average humidity of 87%. Winds will be 1 mph from the E.

Partly cloudy. High temperature around 55F. Dew point will be around 44F with an average humidity of 75%. Winds will be 4 mph from the NE.

Partly cloudy. Low temperature around 44F. Dew point will be around 42F with an average humidity of 84%. Winds will be 2 mph from the E.

Partly cloudy. High temperature around 55F. Dew point will be around 44F with an average humidity of 75%. Winds will be 5 mph from the E.

Cloudy. Low temperature around 45F. Dew point will be around 43F with an average humidity of 84%. Winds will be 1 mph from the E.