Climate almanac
Flagstaff
Arizona, United States · 35.20°, -111.65°
What is the weather like in Flagstaff in September?
In September, Flagstaff is typically 74°F (24°C) during the day and 51°F (10°C) at night. The month brings about 2.1 in (54 mm) of precipitation in total.
- Average high74°F (24°C)
- Average low51°F (10°C)
- Precipitation2.1 in (54 mm)
- Clear or mostly clear days21
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)