Charles County, MD Climate

Charles, MD County has a humid subtropical climate, with hot and humid summers and mild winters. The average temperature in the summer is around 80 degrees Fahrenheit and the average winter temperature is about 40 degrees Fahrenheit. Rainfall is abundant throughout the year, with annual rainfall usually exceeding 40 inches. The area remains relatively dry from late winter through early spring, while late spring and early summer are typically wetter. Winters are generally mild, though occasional bouts of cold weather can occur due to Arctic air masses from Canada. Overall, the climate of Charles, MD County is warm and enjoyable year-round.

Charles County, Maryland gets 44 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Charles County averages 15 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 202 sunny days per year in Charles County. The US average is 205 sunny days.

Charles County gets some kind of precipitation, on average, 112 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 87 degrees
Winter Low: the January low is 27
Rain: averages 44 inches of rain a year
Snow: averages 15 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Charles County is 7.5 (10=best), which means it is one of the most pleasant places in Maryland.

7.9 Summer - 6 Winter

September, May and June are the most pleasant months in Charles County, while January and February are the least comfortable months.

Climate	Charles, Maryland	United States
	43.9 in.	38.1 in.
	15.0 in.	27.8 in.
	111.8 days	106.2 days
	202 days	205 days
	86.9°	85.8°
	26.8°	21.7°
	7.5	7
	4.2	4.3
	105 ft.	2443 ft.

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 Charles County with an average high temperature of 86.9°, which ranks it as cooler than most places in Maryland. In Charles County, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Charles County are September, May and June.

In Charles County, there are 23.4 days annually when the high temperature is over 90°, which is about average compared to other places in Maryland.

January has the coldest nighttime temperatures for Charles County with an average of 26.8°. This is warmer than most places in Maryland.

In Charles County, there are 81.0 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Maryland.

In Charles County, there are 0.3 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Maryland.

The humidity can be uncomfortably heavy or close in Charles County during the summer months. July is the most humid month, though humidity is low for most of the year. July, August and June are the three most humid months in Charles County.

September is the wettest month in Charles County with 4.2 inches of rain, and the driest month is February with 2.8 inches. The wettest season is Autumn with 27% of yearly precipitation and 21% occurs in Spring, which is the driest season. The annual rainfall of 43.9 inches in Charles County means that it is about average compared to other places in Maryland.

May is the rainiest month in Charles County with 10.7 days of rain, and October is the driest month with only 7.6 rainy days. There are 111.8 rainy days annually in Charles County, which is less rainy than most places in Maryland. The rainiest season is Summer when it rains 28% of the time and the driest is Winter with only a 22% chance of a rainy day.

An annual snowfall of 15.0 inches in Charles County means that it is about average compared to other places in Maryland. January is the snowiest month in Charles County with 5.9 inches of snow, and 5 months of the year have significant snowfall.

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