Millis, MA has a humid continental climate with warm and humid summers and chilly and snowy winters. The average high temperature in the summer is around 80 degrees Fahrenheit and the average low temperature in the winter is around 20 degrees Fahrenheit. Precipitation is common throughout all four seasons and snowfall averages around 40 inches annually. On hot summer days, Millis experiences occasional bouts of extreme humidity that can lead to uncomfortable levels of heat.
Millis, Massachusetts gets 49 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Millis averages 47 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 201 sunny days per year in Millis. The US average is 205 sunny days.
Millis gets some kind of precipitation, on average, 121 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.
Summer High: the July high is around 83 degrees
Winter Low: the January low is 16
Rain: averages 49 inches of rain a year
Snow: averages 47 inches of snow a year
BESTPLACES COMFORT INDEX
The annual BestPlaces Comfort Index for Millis is 6.9 (10=best), which means it is about average compared to other places in Massachusetts.
9.1 / 4.9
Summer / Winter
August, July and June are the most pleasant months in Millis, while January and February are the least comfortable months.