10-Day Weather Forecast - San Marcos, CA

Partly cloudy. Highs 78 to 83. Areas of winds southwest to 10 mph.

Partly cloudy. Patchy fog overnight. Lows 47 to 56 in wind sheltered areas to 53 to 57 in warmer locations. Areas of winds southwest to 10 mph in the evening becoming light.

Cloudy in the morning. . . Becoming mostly cloudy. Patchy fog in the morning. Highs 72 to 77. Areas of winds southwest to 10 mph.

Mostly cloudy. A slight chance of showers overnight. Patchy fog overnight. Lows 48 to 56 in wind sheltered areas to 52 to 57 in warmer locations. Areas of winds south to 10 mph. Chance of measurable precipitation 20 percent.

Patchy fog in the morning. Mostly cloudy with a slight chance of showers in the morning then partly cloudy in the afternoon. Highs 72 to 75 in the western valleys to 67 to 72 near the foothills.

Partly cloudy. Patchy fog overnight. Lows 49 to 55.

Mostly cloudy with patchy fog in the morning. . . Becoming partly cloudy. Highs 69 to 72 in the western valleys to 64 to 69 near the foothills.

Partly cloudy. Lows 47 to 53.

Partly cloudy. Highs around 74 in the western valleys to 68 to 73 near the foothills.

Partly cloudy in the evening. . . Becoming mostly clear. Lows 46 to 52.

Mostly sunny. Highs around 80 in the western valleys to 74 to 79 near the foothills.

Mostly clear. Lows 49 to 55.

Mostly sunny. Highs 81 to 86.

Clear. Low temperature around 54F. Dew point will be around 53F with an average humidity of 83%. Winds will be 2 mph from the W.

Sunny. High temperature around 70F. Dew point will be around 55F with an average humidity of 72%. Winds will be 4 mph from the W.

Clear. Low temperature around 53F. Dew point will be around 54F with an average humidity of 90%. Winds will be 2 mph from the W.

Sunny. High temperature around 69F. Dew point will be around 55F with an average humidity of 73%. Winds will be 5 mph from the W.

Clear. Low temperature around 53F. Dew point will be around 54F with an average humidity of 90%. Winds will be 3 mph from the W.