10-Day Weather Forecast - Saint Helena, CA

Sunny. Patchy dense fog in the morning. Highs in the 50s to upper 60s. East winds 10 to 20 mph. . . Becoming southeast 5 to 10 mph in the afternoon.

Clear except for dense fog. Lows in the upper 30s to lower 50s. Northeast winds 5 to 10 mph.

Sunny. Patchy dense fog in the morning. Highs in the 50s to upper 60s. Northeast winds 5 to 15 mph.

Clear except for dense fog after midnight. Lows in the upper 30s to lower 50s. Northeast winds 5 to 10 mph.

Sunny. Highs in the 50s to upper 60s.

Clear except for dense fog. Lows in the 30s to upper 40s.

Sunny. Highs in the 50s to upper 60s.

Mostly clear in the evening then becoming partly cloudy. Patchy dense fog. Lows in the 30s to upper 40s.

Partly cloudy. Patchy dense fog. Highs in the mid 50s to upper 60s. Lows in the 30s to upper 40s.

Partly cloudy. Patchy dense fog. Highs in the mid 50s to upper 60s. Lows in the 30s to upper 40s.

Partly cloudy. Patchy dense fog. Highs in the mid 50s to upper 60s. Lows in the 30s to upper 40s.

Partly cloudy. Patchy dense fog. Highs in the mid 50s to upper 60s. Lows in the 30s to upper 40s.

Partly cloudy. Patchy dense fog. Highs in the mid 50s to upper 60s. Lows in the 30s to upper 40s.

Mostly clear. Low temperature around 38F. Dew point will be around 42F with an average humidity of 96%. Winds will be 2 mph from the W.

Mostly cloudy. High temperature around 54F. Dew point will be around 44F with an average humidity of 82%. Winds will be 2 mph from the W.

Mostly cloudy. Low temperature around 37F. Dew point will be around 40F with an average humidity of 96%. Winds will be 3 mph from the W.

Mostly sunny. High temperature around 54F. Dew point will be around 41F with an average humidity of 79%. Winds will be 4 mph from the NW.

Clear. Low temperature around 34F. Dew point will be around 37F with an average humidity of 94%. Winds will be 4 mph from the NW.