Climate almanac
Mercerville
New Jersey, United States · 40.24°, -74.69°
What is the weather like in Mercerville in September?
In September, Mercerville is typically 78°F (26°C) during the day and 62°F (17°C) at night. The month brings about 3.6 in (92 mm) of precipitation in total.
- Average high78°F (26°C)
- Average low62°F (17°C)
- Precipitation3.6 in (92 mm)
- Clear or mostly clear days11
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)