Climate almanac
Greenisland
Northern Ireland, United Kingdom · 54.70°, -5.87°
What is the weather like in Greenisland in September?
In September, Greenisland is typically 59°F (15°C) during the day and 54°F (12°C) at night. The month brings about 4.4 in (111 mm) of precipitation in total.
- Average high59°F (15°C)
- Average low54°F (12°C)
- Precipitation4.4 in (111 mm)
- Clear or mostly clear days2
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)