Due to its proximity to the Atlantic Ocean and the presence of the Gulf Stream, Sligo enjoys a mild climate with cool summers and mild winters. Most of the weather systems come in from the Atlantic, which is one of the main reasons why the air is always fresh and clean. there are four seasons , spring (February, March, April), Summer (May, June, July), Autumn (August, September, October) and Winter (November, December, January), but it's common that you experience multiple seasons in one day. The best way to describe Sligo's climate is changeable.