Climate almanac
Letterkenny
Ulster, Ireland · 54.95°, -7.73°
What is the weather like in Letterkenny in January?
In January, Letterkenny is typically 45°F (7°C) during the day and 39°F (4°C) at night. The month brings about 4.1 in (103 mm) of precipitation in total. Snowfall averages about 1.5 in (37 mm) over the month.
- Average high45°F (7°C)
- Average low39°F (4°C)
- Precipitation4.1 in (103 mm)
- Clear or mostly clear days1
- Snowfall1.5 in (37 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)