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
|7 DAY FORECAST||DESCRIPTION||HIGH/LOW||WIND|
|Overnight||Partly Cloudy||72° / 96°||S 3 mph|
|Monday Night||Scattered Showers And Thunderstorms then Patchy Fog||75° / 95°||SW 2 to 7 mph|
|Tuesday Night||Chance Showers And Thunderstorms||74° / 94°||S 2 to 6 mph|
|Wednesday Night||Chance Showers And Thunderstorms||74° / 90°||SW 7 mph|
|Thursday Night||Chance Showers And Thunderstorms||67° / 82°||NW 5 mph|
|Friday Night||Chance Showers And Thunderstorms||64° / 83°||N 5 mph|
|Saturday Night||Chance Showers And Thunderstorms then Partly Cloudy||65° / 84°||E 2 to 6 mph|
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)
Hot, Freezing, Rainy, Snowy Days: Fairfax
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.