Climate almanac
Arlington Heights
Illinois, United States · 42.09°, -87.98°
What is the weather like in Arlington Heights in September?
In September, Arlington Heights is typically 77°F (25°C) during the day and 59°F (15°C) at night. The month brings about 3.0 in (75 mm) of precipitation in total.
- Average high77°F (25°C)
- Average low59°F (15°C)
- Precipitation3.0 in (75 mm)
- Clear or mostly clear days13
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)