Zip 21821 (Deal Island, MD) Weather


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The most pleasant months of the year for the 21821 zip code are May, September and October. In the 21821 zip code, there are 3 comfortable months with high temperatures in the range of 70-85°. 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. 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. The most uncomfortably humid months are July, August and June.

Today's Weather - Deal Island, MD

10 PM PST

Rain Showers

65°F

7 DAY FORECASTDESCRIPTIONHIGH/LOWWIND
OvernightRain Showers64° / 75°SW 6 mph
Tuesday NightChance Showers And Thunderstorms65° / 80°S 7 mph
Wednesday NightChance Showers And Thunderstorms65° / 76°SW 8 mph
Thursday NightShowers And Thunderstorms Likely then Chance Showers And Thunderstorms63° / 74°W 15 mph
Friday NightChance Rain Showers54° / 67°NW 15 mph
Saturday NightSlight Chance Rain Showers55° / 69°SW 10 mph
Sunday NightSlight Chance Showers And Thunderstorms53° / 71°S 12 mph

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 Deal Island (zip 21821) area is 7.2 (10=best), which means it is more comfortable than most places in Maryland.

7.2 / 10

A higher score indicates a more comfortable year-round climate. The US average for the comfort index is 7.8. Our index is based on the total number of days annually within the comfort range of 70-80 degrees, and we also applied a penalty for days of excessive humidity.


Average Monthly High and Low (°F)
HighLow
January46° 28°
February49° 29°
March57° 35°
April68° 44°
May77° 53°
June85° 63°
July89° 68°
August87° 66°
September82° 59°
October71° 49°
November61° 40°
December50° 31°
Hot, Freezing, Rainy, Snowy Days: Deal Island
Hot
Days
Freezing
Days
Rainy
Days
Snowy
Days
January02091
February01781
March01190
April03100
May1090
June7090
July14090
August9080
September2070
October0270
November0780
December01690

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.

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