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City of San Marcos, CASan Marcos, CA 7-Day Weather Forecast
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San Marcos Weather Forecast
San Marcos, CA Weather Forecast Date: 1215 PM PDT Mon Oct 12 2026
Weather forecast for San Marcos, CA
Tonight Lo: 51°F Lo: 11°C |
Tonight... Mostly cloudy this evening...Becoming partly cloudy. A chance of showers. Lows 47 to 54. Areas of winds southwest to 10 mph this evening becoming light. Chance of measurable precipitation 50%. |
Tue Hi: 72°FHi: 22°C Lo: 50°F Lo: 10°C |
Tuesday... Partly cloudy in the morning...Becoming mostly sunny. Highs 70 to 74 in the western valleys to 62 to 67 near the foothills. Areas of winds east to 10 mph becoming northwest 10 mph in the afternoon. |
Wed Hi: 77°FHi: 25°C Lo: 56°F Lo: 13°C |
Wednesday... Mostly sunny. Warmer. Highs 74 to 79. Areas of winds northeast to 10 mph becoming northwest in the afternoon. |
| Thu Hi: 87°FHi: 31°C Lo: 62°F Lo: 17°C |
Thursday... Mostly sunny. Highs 84 to 89 in the western valleys to 78 to 83 near the foothills. |
Fri Hi: 91°FHi: 33°C Lo: 65°F Lo: 18°C |
Friday... Sunny, windy. Highs 89 to 92 in the western valleys to 78 to 83 near the foothills. |
| Sat Hi: 89°FHi: 32°C Lo: 62°F Lo: 17°C |
Saturday... Mostly sunny. Highs 87 to 91 in the western valleys to 77 to 82 near the foothills. |
| Sun Hi: 89°FHi: 32°C Lo: 61°F Lo: 16°C |
Sunday... Mostly sunny. Highs 87 to 91 in the western valleys to 79 to 84 near the foothills. |
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