With a population of around 8,300, Castleknock sits in Leinster, Ireland. The city operates in the GMT/IST time zone.
In 2025, Castleknock averaged an annual temperature of 52°F, with hottest temperatures reaching 85°F in July and lowest around 24°F in January. The city received approximately 41 inches of precipitation during the year.
View historical weather for Castleknock · More cities in Leinster