Zip 21821 (Deal Island, MD) Climate

Deal Island, MD has a humid subtropical climate with mild winters and hot summers. The average high temperatures in the summer months range from 75 to 85 degrees Fahrenheit, while in the winter months they range from 40 to 50 degrees Fahrenheit. Rainfall is abundant throughout the year, with an annual average of 45 inches of rain. Winters tend to be wetter than summer months, while spring and autumn are relatively dry. Snow can occur during the winter months but is usually light and short-lived.

Deal Island (zip 21821), Maryland gets 45 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Deal Island (zip 21821) averages 6 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 207 sunny days per year in Deal Island (zip 21821). The US average is 205 sunny days.

Deal Island (zip 21821) gets some kind of precipitation, on average, 100 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 89 degrees
Winter Low: the January low is 28
Rain: averages 45 inches of rain a year
Snow: averages 6 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for the 21821 zip code is 7.4 (10=best), which means it is one of the most pleasant places in Maryland.

7.2 Summer - 6.4 Winter

May, September and October are the most pleasant months in the 21821 zip code, while January and February are the least comfortable months.

Climate	Deal Island, Maryland	United States
	44.9 in.	38.1 in.
	5.9 in.	27.8 in.
	99.9 days	106.2 days
	207 days	205 days
	89.3°	85.8°
	27.7°	21.7°
	7.4	7
	4.5	4.3
	3 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 21821 zip code with an average high temperature of 89.3°, which ranks it as one of the hottest places in Maryland. In the 21821 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 21821 zip code are May, September and October.

In the 21821 zip code, there are 33.1 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 21821 zip code with an average of 27.7°. This is warmer than most places in Maryland.

In the 21821 zip code, there are 76.3 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Maryland.

In the 21821 zip code, there are 0.3 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Maryland.

Humidity in the 21821 zip code can be uncomfortable during the summer, but comfortable for most of the year. The most uncomfortably humid months are July, August and June. The humid season runs from June-September and the most comfortable months are October-May.

August is the wettest month in the 21821 zip code with 4.4 inches of rain, and the driest month is February with 3.1 inches. The wettest season is Autumn with 28% of yearly precipitation and 23% occurs in Winter, which is the driest season. The annual rainfall of 44.9 inches in the 21821 zip code means that it is wetter than most places in Maryland.

April is the rainiest month in the 21821 zip code with 9.5 days of rain, and September is the driest month with only 6.7 rainy days. There are 99.9 rainy days annually in the 21821 zip code, which is one of the least rainy 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 5.9 inches in the 21821 zip code means that it is one of the least snowy places in Maryland. February is the snowiest month in the 21821 zip code with 2.2 inches of snow, and 3 months of the year have significant snowfall.

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