Annual precipitation averages 47.2 inches ( 1,200 mm ) .
Is plentiful year - round , but with a slightly drier summer ; snowfall averages 61.9 inches ( 157 cm ) .
Annual precipitation averages 47.2 inches ( 1,200 mm ) and is plentiful year - round , but with a slightly drier summer ; snowfall averages 61.9 inches ( 157 cm ) .