Climate almanac
Johnston
Rhode Island, United States · 41.82°, -71.51°
What is the weather like in Johnston in September?
In September, Johnston is typically 74°F (23°C) during the day and 59°F (15°C) at night. The month brings about 3.9 in (99 mm) of precipitation in total.
- Average high74°F (23°C)
- Average low59°F (15°C)
- Precipitation3.9 in (99 mm)
- Clear or mostly clear days10
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)