TODAY DEC14
TEMPERATURE
HUMIDITY96
PRESSURE30.42
WIND COND.300 3.4
  • 5341Sat100%90%
  • 4635Sun80%70%
  • 4932Mon
  • 4128Tue
  • 4432Wed
daynightWeather update from Washington/Dulles International Airport, DC at

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Great Falls Average Temperature

In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
January24°F46°F34°F2.7"
February25°F48°F36°F2.1"
March33°F58°F45°F3.2"
April43°F71°F56°F3.7"
May52°F78°F65°F5.6"
June61°F86°F74°F4.5"
July66°F90°F78°F4.2"
August65°F88°F76°F2.8"
September58°F82°F69°F3.5"
October46°F71°F58°F5.4"
November35°F59°F46°F2.6"
December29°F50°F39°F3.8"

Did you know?

  • The highest monthly average temperature in Great Falls for July is 78 degrees.
  • The lowest monthly average temperature in Great Falls for January is 34 degrees.
  • The most monthly precipitation in Great Falls occurs in May with 5.6 inches.
  • The air quality index in Great Falls is 1% better than the national average.
  • The pollution index in Great Falls is 190% worse than the national average.

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Compare Great Falls, VA Weather To Other Cities

Great Falls air quality index & pollution index

In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
IndexGreat FallsVirginiaNational
Air quality index495850
Pollution index14,693,9001,533,7925,066,862

Great Falls air quality information

MeasurementTotal
Days measured365
Days with good air quality194
Days with moderate air quality166
Days w/ poor A.Q. for sensitive groups5
Days with unhealthy air quality

Great Falls air quality information

PollutantTotal
Arsenic0.190%
Benzene0.210%
Carbon Tetrachloride0.060%
Lead0.060%
Mercury0.010%

Average monthly Great Falls temperature with heat index

Great Falls monthly precipitation with daily maximum

Great Falls monthly snow depth with daily maximum

Great Falls monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Chantilly, VA24,312492%
Dunn Loring, VA9,397492%
Fair Oaks, VA33,478492%
George Mason, VA10,028492%
Kings Park, VA4,687492%
Great Falls, VA15,786492%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
East San Gabriel, CA15,7877448%
Grosse Pointe Woods, MI15,785524%
North Arlington, NJ15,788536%
Jasper, IN15,7901178%
Walnut Park, CA15,7917448%
Great Falls, VA15,786492%
Source: The Great Falls, VA weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.