Climate almanac
Castlebar
Connacht, Ireland · 53.85°, -9.30°
What is the weather like in Castlebar in September?
In September, Castlebar is typically 61°F (16°C) during the day and 50°F (10°C) at night. The month brings about 4.0 in (101 mm) of precipitation in total.
- Average high61°F (16°C)
- Average low50°F (10°C)
- Precipitation4.0 in (101 mm)
- Clear or mostly clear days1
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)