McLean, VA Climate

McLean, VA has a temperate climate with hot, humid summers and cold, wet winters. The average temperature in the summer months ranges between 70-85 degrees Fahrenheit while the winter months usually range between 30-45 degrees Fahrenheit. During the summer, there is often plenty of sunshine that allows for outdoor activities such as swimming and hiking. In the winter, snowfall is common but temperatures rarely drop below freezing. Rainfall is spread out evenly throughout the year, although it is slightly more frequent during the spring and fall months.

McLean, Virginia gets 44 inches of rain, on average, per year. The US average is 38 inches of rain per year.

McLean averages 20 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 203 sunny days per year in McLean. The US average is 205 sunny days.

McLean gets some kind of precipitation, on average, 117 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 86 degrees
Winter Low: the January low is 25
Rain: averages 44 inches of rain a year
Snow: averages 20 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for McLean is 7.3 (10=best), which means it is about average compared to other places in Virginia.

8.1 Summer - 5.7 Winter

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

Climate	McLean, Virginia	United States
	43.8 in.	38.1 in.
	20.1 in.	27.8 in.
	117.0 days	106.2 days
	203 days	205 days
	86.0°	85.8°
	24.5°	21.7°
	7.3	7
	4	4.3
	285 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 McLean with an average high temperature of 86.0°, which ranks it as cooler than most places in Virginia. In McLean, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for McLean are September, May and June.

In McLean, there are 20.4 days annually when the high temperature is over 90°, which is about average compared to other places in Virginia.

January has the coldest nighttime temperatures for McLean with an average of 24.5°. This is about average compared to other places in Virginia.

In McLean, there are 94.6 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Virginia.

In McLean, there are 0.3 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Virginia.

The humidity can be uncomfortably heavy or close in McLean 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 McLean.

May is the wettest month in McLean with 4.4 inches of rain, and the driest month is February with 2.8 inches. The wettest season is Autumn with 27% of yearly precipitation and 20% occurs in Spring, which is the driest season. The annual rainfall of 43.8 inches in McLean means that it is about average compared to other places in Virginia.

May is the rainiest month in McLean with 11.9 days of rain, and August is the driest month with only 8.6 rainy days. There are 117.0 rainy days annually in McLean, which is rainier than most places in Virginia. 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 20.1 inches in McLean means that it is snowier than most places in Virginia. January is the snowiest month in McLean with 7.7 inches of snow, and 5 months of the year have significant snowfall.