About Carndonagh, Ulster's Climate & Weather History

With a population of around 2,500, Carndonagh sits in Ulster, Ireland. The city operates in the GMT/IST time zone.

In 2025, Carndonagh recorded an average annual temperature of 50°F. The hottest temperatures reached 78°F in July; the coolest were 31°F in January. Total precipitation for the year was 51 inches, with the wettest month being November. Snowfall for the year totaled approximately 5 inches.