10-Day Weather Forecast - San Marcos, CA

Mostly sunny. Highs 74 to 79. Areas of winds east to 10 mph in the morning becoming light.

Mostly clear. Lows 43 to 51 in wind sheltered areas to 48 to 54 in warmer locations. Light winds.

Mostly sunny in the morning. . . Becoming partly cloudy. Highs 70 to 75. Light winds becoming west 10 mph in the afternoon.

Partly cloudy in the evening. . . Becoming mostly cloudy overnight with patchy fog. Local visibility one quarter mile or less at times overnight. Lows 43 to 51 in wind sheltered areas to 49 to 54 in warmer locations. Light winds.

Mostly cloudy with patchy fog in the morning. . . Becoming partly cloudy. A slight chance of showers. Local visibility one quarter mile or less at times in the morning. Highs 63 to 68.

Partly cloudy in the evening. . . Becoming mostly cloudy. A slight chance of showers. Patchy fog overnight. Local visibility one quarter mile or less at times overnight. Lows 47 to 51.

Mostly cloudy with patchy fog in the morning. . . Becoming partly cloudy. A slight chance of showers. Local visibility one quarter mile or less at times in the morning. Highs 64 to 67 in the western valleys to 59 to 64 near the foothills.

Partly cloudy with a slight chance of showers. Lows 46 to 50.

Partly cloudy. Highs around 70 in the western valleys to 62 to 67 near the foothills.

Partly cloudy in the evening. . . Becoming mostly clear. Lows 44 to 49.

Mostly sunny. Highs around 73 in the western valleys to 65 to 70 near the foothills.

Mostly clear in the evening. . . Becoming partly cloudy. Lows 45 to 50.

Partly cloudy. Highs around 73 in the western valleys to 67 to 72 near the foothills.

Partly cloudy. Low temperature around 50F. Dew point will be around 39F with an average humidity of 57%. Winds will be 3 mph from the E.

Partly cloudy. High temperature around 68F. Dew point will be around 40F with an average humidity of 42%. Winds will be 3 mph from the W.

Partly cloudy. Low temperature around 51F. Dew point will be around 38F with an average humidity of 53%. Winds will be 3 mph from the E.

Mostly sunny. High temperature around 68F. Dew point will be around 41F with an average humidity of 42%. Winds will be 2 mph from the W.

Partly cloudy. Low temperature around 51F. Dew point will be around 40F with an average humidity of 58%. Winds will be 2 mph from the E.