Zip 21009 (Bel Air South, MD) Climate

The climate in 21009 Bel Air South, MD is typically classified as humid subtropical. Summers are hot and humid, with temperatures reaching into the mid-90s. Winters are typically mild and wet, with temperatures averaging in the mid-40s. Spring and fall are pleasant, with temperatures usually ranging between the mid-50s and mid-70s. On average, the area receives about 45 inches of rain per year, mostly concentrated during the summer months. The area also experiences mild snowfall in winter, usually totaling less than 10 inches per year.

Bel Air South (zip 21009), Maryland gets 47 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Bel Air South (zip 21009) averages 18 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 Bel Air South (zip 21009). The US average is 205 sunny days.

Bel Air South (zip 21009) gets some kind of precipitation, on average, 123 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 88 degrees
Winter Low: the January low is 25
Rain: averages 47 inches of rain a year
Snow: averages 18 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for the 21009 zip code is 7.2 (10=best), which means it is less comfortable than most places in Maryland.

7.8 Summer - 5.7 Winter

September, May and June are the most pleasant months in the 21009 zip code, while January and February are the least comfortable months.

Climate	Bel Air South, Maryland	United States
	46.7 in.	38.1 in.
	17.9 in.	27.8 in.
	123.2 days	106.2 days
	213 days	205 days
	88.3°	85.8°
	24.7°	21.7°
	7.2	7
	4.6	4.3
	148 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 the 21009 zip code with an average high temperature of 88.3°, which ranks it as warmer than most places in Maryland. In the 21009 zip code, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for the 21009 zip code are September, May and June.

In the 21009 zip code, there are 29.8 days annually when the high temperature is over 90°, which is hotter than most places in Maryland.

January has the coldest nighttime temperatures for the 21009 zip code with an average of 24.7°. This is about average compared to other places in Maryland.

In the 21009 zip code, there are 90.7 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Maryland.

In the 21009 zip code, there are 0.5 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Maryland.

The humidity is usually acceptable in the 21009 zip code but some summer months can be sticky or muggy. August is the most humid month, though humidity is low for most of the year. August, July and June are the three most uncomfortably humid months in the 21009 zip code.

September is the wettest month in the 21009 zip code with 4.7 inches of rain, and the driest month is February with 2.9 inches. The wettest season is Summer with 26% of yearly precipitation and 22% occurs in Spring, which is the driest season. The annual rainfall of 46.7 inches in the 21009 zip code means that it is one of the wettest places in Maryland.

April is the rainiest month in the 21009 zip code with 12.0 days of rain, and October is the driest month with only 8.7 rainy days. There are 123.2 rainy days annually in the 21009 zip code, which is rainier 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 23% chance of a rainy day.

An annual snowfall of 17.9 inches in the 21009 zip code means that it is snowier than most places in Maryland. February is the snowiest month in the 21009 zip code with 8.1 inches of snow, and 4 months of the year have significant snowfall.

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