Climate almanac
Saint John
New Brunswick, Canada · 45.27°, -66.06°
What is the weather like in Saint John in September?
In September, Saint John is typically 63°F (17°C) during the day and 55°F (13°C) at night. The month brings about 3.8 in (97 mm) of precipitation in total.
- Average high63°F (17°C)
- Average low55°F (13°C)
- Precipitation3.8 in (97 mm)
- Clear or mostly clear days10
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)