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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: 1201 AM PDT Fri Aug 07 2026
Weather forecast for San Marcos, CA
Today Hi: 87°FHi: 31°C Lo: 67°F Lo: 19°C |
Today... Mostly sunny. Highs 85 to 89 in the western valleys to 89 to 94 near the foothills. Areas of winds southwest to 10 mph becoming west this afternoon. |
| Sat Hi: 88°FHi: 31°C Lo: 68°F Lo: 20°C |
Saturday... Mostly sunny. Highs 86 to 90 in the western valleys to 93 to 98 near the foothills. Areas of winds west to 10 mph... Becoming 10 to 15 mph in the afternoon. |
Sun Hi: 88°FHi: 31°C Lo: 68°F Lo: 20°C |
Sunday... Partly cloudy with patchy fog in the morning...Becoming mostly sunny. Highs 85 to 90 in the western valleys to 93 to 98 near the foothills. Light winds becoming west 10 mph in the afternoon. |
| Mon Hi: 87°FHi: 31°C Lo: 66°F Lo: 19°C |
Monday... Partly cloudy with patchy fog in the morning...Becoming mostly sunny. Highs 84 to 89 in the western valleys to 90 to 95 near the foothills. |
Tue Hi: 87°FHi: 31°C Lo: 65°F Lo: 18°C |
Tuesday... Partly cloudy. Highs 84 to 89 in the western valleys to 88 to 93 near the foothills. |
| Wed Hi: 85°FHi: 29°C Lo: 64°F Lo: 18°C |
Wednesday... Partly cloudy in the morning...Becoming mostly sunny. Highs 83 to 87 in the western valleys to 86 to 91 near the foothills. |
| Thu Hi: 83°FHi: 28°C |
Thursday... Partly cloudy in the morning...Becoming mostly sunny. Highs 81 to 85 in the western valleys to 84 to 89 near the foothills. |
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