Zip 21155 (Upperco, MD) Climate

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.

Weather Highlights

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 Summer - 5.4 Winter

June, September and August are the most pleasant months in the 21155 zip code, while January and February are the least comfortable months.

Climate	Upperco, Maryland	United States
	Unlock	38.1 in.
	26.5 in.	Unlock
	Unlock	106.2 days
	213 days	Unlock
	86.3°	85.8°
	Unlock	21.7°
	7.1	Unlock
	Unlock	4.3
	615 ft.	Unlock

Climate

YOU SHOULD KNOW

Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.

July is the hottest month for the 21155 zip code with an average high temperature of 86.3°, which ranks it as cooler than most places in Maryland. In the 21155 zip code, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for the 21155 zip code are September, May and June.

In the 21155 zip code, there are 19.1 days annually when the high temperature is over 90°, which is cooler than most places in Maryland.

January has the coldest nighttime temperatures for the 21155 zip code with an average of 21.0°. This is colder than most places in Maryland.

In the 21155 zip code, there are 114.5 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Maryland.

In the 21155 zip code, there are 1.3 days annually when the nighttime low temperature falls below zero°, which is one of the coldest places in Maryland.

The humidity is usually comfortable in the 21155 zip code but some summer months can be sticky or muggy. July is the most humid month, though humidity is low for most of the year. The most humid months are July, August and June.

September is the wettest month in the 21155 zip code with 4.4 inches of rain, and the driest month is February with 2.8 inches. The wettest season is Autumn with 26% of yearly precipitation and 21% occurs in Spring, which is the driest season. The annual rainfall of 43.4 inches in the 21155 zip code means that it is about average compared to other places in Maryland.

May is the rainiest month in the 21155 zip code with 12.7 days of rain, and October is the driest month with only 8.4 rainy days. There are 120.8 rainy days annually in the 21155 zip code, which is rainier than most places in Maryland. The rainiest season is Summer when it rains 29% of the time and the driest is Winter with only a 22% chance of a rainy day.

An annual snowfall of 26.5 inches in the 21155 zip code means that it is snowier than most places in Maryland. February is the snowiest month in the 21155 zip code with 9.3 inches of snow, and 5 months of the year have significant snowfall.

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