Average humidity in San Marcos (CA)
The mean monthly relative humidity over the year in San Marcos (California), the United States of America.
Data from: San Diego, the United States of America (47 KM, 29 Miles).
- On average, July is the most humid month, at 75.0%.
- On average, January is the least humid month, at 64.0%.
- The average annual percentage of humidity is 69%.
Forecast for San Marcos (CA)
Sat Nov 23
17°C | 5°C
W 
11 km/h
11 km/h
partly cloudy and no rain
Sun Nov 24
17°C | 12°C
W 11 km/h
11 km/h
partly cloudy and no rain
Mon Nov 25
20°C | 10°C
W 11 km/h
11 km/h
almost clear and no rain
