Climate almanac
Letterkenny
Ulster, Ireland · 54.95°, -7.73°
What is the weather like in Letterkenny in December?
In December, Letterkenny is typically 47°F (8°C) during the day and 40°F (5°C) at night. The month brings about 4.6 in (117 mm) of precipitation in total. Snowfall averages about 0.5 in (14 mm) over the month.
- Average high47°F (8°C)
- Average low40°F (5°C)
- Precipitation4.6 in (117 mm)
- Clear or mostly clear days1
- Snowfall0.5 in (14 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)