Climate almanac
Mount Vernon
Indiana, United States · 40.67°, -85.82°
What is the weather like in Mount Vernon in September?
In September, Mount Vernon is typically 79°F (26°C) during the day and 59°F (15°C) at night. The month brings about 2.4 in (61 mm) of precipitation in total.
- Average high79°F (26°C)
- Average low59°F (15°C)
- Precipitation2.4 in (61 mm)
- Clear or mostly clear days13
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)