Airolo has an average of 121.4 days of rain or snow per year and on average receives 1,662 mm (65.4 in) of precipitation. The wettest month is October during which time Airolo receives an average of 193 mm (7.6 in) of rain or snow. During this month there is precipitation for an average of 9.3 days. The month with the most days of precipitation is May, with an average of 13, but with only 184 mm (7.2 in) of rain or snow. The driest month of the year is January with an average of 88 mm (3.5 in) of precipitation over 9.3 days
