21155 Upperco, MD has a mild climate with relatively warm summers and cool winters. The average temperature in the summer hovers around 75 degrees Fahrenheit, while the winter months typically stay between 35-45 degrees Fahrenheit. The area experiences moderate rainfall and snowfall throughout the year, averaging about 3 inches of snow each winter season. Snowfall has been known to be heavy at times, especially during the months of December through February. When it comes to sunshine, 21155 Upperco, MD sees an average of 231 days of sun annually.
Upperco (zip 21155), Maryland gets 43 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Upperco (zip 21155) averages 27 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 213 sunny days per year in Upperco (zip 21155). The US average is 205 sunny days.
Upperco (zip 21155) 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 86 degrees
Winter Low: the January low is 21
Rain: averages 43 inches of rain a year
Snow: averages 27 inches of snow a year
BESTPLACES COMFORT INDEX
The annual BestPlaces Comfort Index for the 21155 zip code is 7.1 (10=best), which means it is less comfortable than most places in Maryland.
8.6 / 5.4
Summer / Winter
June, September and August are the most pleasant months in the 21155 zip code, while January and February are the least comfortable months.