10-Day Weather Forecast - San Marcos, CA

Partly cloudy in the morning. . . Becoming mostly cloudy. Highs around 80 in the western valleys to 72 to 77 near the foothills. Areas of winds east 15 to 25 mph with gusts to 40 mph becoming southwest 10 to 15 mph with gusts to 30 mph in the afternoon.

Cloudy in the evening then partly cloudy with a slight chance of showers overnight. Cooler. Lows 48 to 55. Areas of winds east to 10 mph. Chance of measurable precipitation 20 percent.

Partly cloudy. Highs 69 to 74. Light winds becoming southwest 10 mph in the afternoon.

Partly cloudy. Patchy fog overnight. Lows 46 to 52. Light winds.

Partly cloudy with patchy fog in the morning. . . Becoming mostly sunny. Highs 72 to 77.

Mostly clear. Lows 48 to 55.

Mostly sunny. Highs around 80 in the western valleys to 73 to 78 near the foothills.

Mostly clear. Lows 48 to 55.

Partly cloudy. Highs 72 to 77.

Mostly cloudy. A slight chance of showers overnight. Lows 49 to 55.

Cloudy with a slight chance of showers in the morning then mostly cloudy with a chance of showers in the afternoon. Highs around 66 in the western valleys to 60 to 65 near the foothills.

Mostly cloudy with a chance of showers. Lows 46 to 52.

Mostly cloudy. A slight chance of showers in the morning then a chance of showers in the afternoon. Highs around 65 in the western valleys to 58 to 63 near the foothills.

Cloudy with a slight chance of rain. Chance of precipitation 25%. Low temperature around 46F. Dew point will be around 46F with an average humidity of 89%. Winds will be 2 mph from the W.

Mostly sunny. High temperature around 61F. Dew point will be around 47F with an average humidity of 70%. Winds will be 4 mph from the SW.

Clear. Low temperature around 46F. Dew point will be around 45F with an average humidity of 85%. Winds will be 2 mph from the E.

Sunny. High temperature around 63F. Dew point will be around 47F with an average humidity of 66%. Winds will be 4 mph from the SW.

Clear. Low temperature around 46F. Dew point will be around 46F with an average humidity of 83%. Winds will be 2 mph from the SW.