Fairfax County, Virginia 

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Weather in Fairfax County, Virginia

The most pleasant months of the year for Fairfax County are September, May and June. In Fairfax County, there are 3 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for Fairfax County with an average high temperature of 86.7°, which ranks it as about average compared to other places in Virginia. January is the snowiest month in Fairfax County with 7.0 inches of snow, and 5 months of the year have significant snowfall. July is the most humid month, though humidity is low for most of the year.


Today's Weather - Fairfax, VA

2 AM PST

Partly Cloudy

76°F

7 DAY FORECASTDESCRIPTIONHIGH/LOWWIND
OvernightPartly Cloudy72° / 96°S 3 mph
Monday NightScattered Showers And Thunderstorms then Patchy Fog75° / 95°SW 2 to 7 mph
Tuesday NightChance Showers And Thunderstorms74° / 94°S 2 to 6 mph
Wednesday NightChance Showers And Thunderstorms74° / 90°SW 7 mph
Thursday NightChance Showers And Thunderstorms67° / 82°NW 5 mph
Friday NightChance Showers And Thunderstorms64° / 83°N 5 mph
Saturday NightChance Showers And Thunderstorms then Partly Cloudy65° / 84°E 2 to 6 mph

Weather Highlights

Summer High: the July high is around 87 degrees
Winter Low: the January low is 25
Rain: averages 43 inches of rain a year
Snow: averages 19 inches of snow a year


BESTPLACES COMFORT INDEX

The annual BestPlaces Comfort Index for the Fairfax County area is 7.3 (10=best), which means it is more comfortable than most places in Virginia.

7.3 / 10

A higher score indicates a more comfortable year-round climate. The US average for the comfort index is 7. 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
January43° 25°
February46° 27°
March55° 34°
April67° 43°
May74° 53°
June83° 63°
July87° 67°
August85° 66°
September78° 58°
October67° 46°
November57° 37°
December46° 28°
Hot, Freezing, Rainy, Snowy Days: Fairfax
Hot
Days
Freezing
Days
Rainy
Days
Snowy
Days
January024103
February02092
March014101
April03110
May10120
June50110
July90100
August7090
September2090
October0280
November0990
December021101

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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MAPS OF FAIRFAX COUNTY, VIRGINIA
ZIP CODES IN FAIRFAX COUNTY, VIRGINIA
22003, 20171, 22015, 20170, 20120, 22033, 22306, 22309, 22079, 22042, ... 43 more

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