Climate almanac
Irmo
South Carolina, United States · 34.09°, -81.18°
What is the weather like in Irmo in September?
In September, Irmo is typically 84°F (29°C) during the day and 69°F (20°C) at night. The month brings about 3.4 in (85 mm) of precipitation in total.
- Average high84°F (29°C)
- Average low69°F (20°C)
- Precipitation3.4 in (85 mm)
- Clear or mostly clear days14
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)