Climate almanac
San Luis Obispo
California, United States · 35.28°, -120.66°
What is the weather like in San Luis Obispo in September?
In September, San Luis Obispo is typically 72°F (22°C) during the day and 59°F (15°C) at night. The month brings about 0.2 in (5 mm) of precipitation in total.
- Average high72°F (22°C)
- Average low59°F (15°C)
- Precipitation0.2 in (5 mm)
- Clear or mostly clear days22
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)