Climate almanac
Castlebar
Connacht, Ireland · 53.85°, -9.30°
What is the weather like in Castlebar in December?
In December, Castlebar is typically 47°F (9°C) during the day and 40°F (5°C) at night. The month brings about 4.7 in (118 mm) of precipitation in total. Snowfall averages about 0.9 in (23 mm) over the month.
- Average high47°F (9°C)
- Average low40°F (5°C)
- Precipitation4.7 in (118 mm)
- Clear or mostly clear days1
- Snowfall0.9 in (23 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)