Zip 21638 (Grasonville, MD) Climate

Grasonville, MD has a humid subtropical climate with mild winters and hot, humid summers. The area typically has warm to hot temperatures throughout the year with occasional cold snaps during winter months. Precipitation is generally abundant in the area, and rainfall is distributed fairly evenly throughout the year. Snowfall is usually light, but can be more frequent along the shoreline of Chesapeake Bay. Humidity levels are usually high due to proximity to the water, but some cooler periods do occur during winter months.

Grasonville (zip 21638), Maryland gets 46 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Grasonville (zip 21638) averages 13 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 Grasonville (zip 21638). The US average is 205 sunny days.

Grasonville (zip 21638) 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 28
Rain: averages 46 inches of rain a year
Snow: averages 13 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for the 21638 zip code is 7.4 (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 the 21638 zip code, while January and February are the least comfortable months.

Climate	Grasonville, Maryland	United States
	Unlock	38.1 in.
	13.0 in.	Unlock
	Unlock	106.2 days
	213 days	Unlock
	86.5°	85.8°
	Unlock	21.7°
	7.4	Unlock
	Unlock	4.3
	3 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 21638 zip code with an average high temperature of 86.5°, which ranks it as cooler than most places in Maryland. In the 21638 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 21638 zip code are September, May and June.

In the 21638 zip code, there are 14.9 days annually when the high temperature is over 90°, which is one of the coolest places in Maryland.

January has the coldest nighttime temperatures for the 21638 zip code with an average of 28.0°. This is warmer than most places in Maryland.

In the 21638 zip code, there are 65.0 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Maryland.

In the 21638 zip code, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in Maryland.

The humidity can be uncomfortably heavy or close in the 21638 zip code 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 the 21638 zip code.

September is the wettest month in the 21638 zip code with 4.4 inches of rain, and the driest month is February with 3.0 inches. The wettest season is Summer with 27% of yearly precipitation and 22% occurs in Spring, which is the driest season. The annual rainfall of 46.1 inches in the 21638 zip code means that it is one of the wettest places in Maryland.

April is the rainiest month in the 21638 zip code with 10.7 days of rain, and September is the driest month with only 7.8 rainy days. There are 112.2 rainy days annually in the 21638 zip code, which is about average compared to other 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 13.0 inches in the 21638 zip code means that it is less snowy than most places in Maryland. January is the snowiest month in the 21638 zip code with 5.8 inches of snow, and 4 months of the year have significant snowfall.

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