10-Day Weather Forecast - San Marcos, CA

Partly cloudy with patchy fog in the morning. . . Becoming sunny. Highs 76 to 81 in the western valleys to 81 to 86 near the foothills. Areas of winds west to 10 mph. . . Becoming 10 to 15 mph in the afternoon.

Mostly clear in the evening. . . Becoming partly cloudy overnight with patchy fog. Lows 53 to 58. Areas of winds west to 10 mph in the evening becoming light.

Mostly cloudy with patchy fog in the morning. . . Becoming mostly sunny. Highs 74 to 78 in the western valleys to 78 to 83 near the foothills. Areas of winds southwest to 10 mph becoming west in the afternoon.

Mostly clear in the evening. . . Becoming partly cloudy overnight with patchy fog. Lows 53 to 59. Areas of winds southwest 10 mph in the evening becoming light.

Mostly cloudy with patchy fog in the morning. . . Becoming partly cloudy. Highs 72 to 77.

Partly cloudy. Lows 51 to 59.

Mostly cloudy in the morning. . . Becoming partly cloudy. Highs 69 to 74.

Mostly clear in the evening. . . Becoming partly cloudy. Lows 49 to 57.

Partly cloudy in the morning. . . Becoming mostly sunny. Highs 71 to 75 in the western valleys to 73 to 78 near the foothills.

Mostly clear. Lows 49 to 56.

Partly cloudy in the morning. . . Becoming mostly sunny. Highs 72 to 76 in the western valleys to 74 to 79 near the foothills.

Mostly clear. Lows 50 to 57.

Partly cloudy in the morning. . . Becoming mostly sunny. Highs 72 to 76 in the western valleys to 76 to 81 near the foothills.

Clear. Low temperature around 59F. Dew point will be around 56F with an average humidity of 85%. Winds will be 3 mph from the W.

Sunny. High temperature around 76F. Dew point will be around 58F with an average humidity of 63%. Winds will be 6 mph from the W.

Clear. Low temperature around 61F. Dew point will be around 57F with an average humidity of 79%. Winds will be 3 mph from the W.

Mostly sunny. High temperature around 81F. Dew point will be around 59F with an average humidity of 56%. Winds will be 6 mph from the W.

Clear. Low temperature around 64F. Dew point will be around 58F with an average humidity of 70%. Winds will be 3 mph from the W.