With a population of around 2,500, Castleisland sits in Munster, Ireland. The city operates in the GMT/IST time zone.
In 2025, Castleisland recorded an average annual temperature of 51°F. The hottest temperatures reached 80°F in July; the coolest were 18°F in January. Total precipitation for the year was 59 inches, with the wettest month being November. Snowfall for the year totaled approximately 7 inches.
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