Great Falls, VA Weather - Forecast & Monthly Averages

TEMPERATURE	28
HUMIDITY	53
PRESSURE	102810
WIND COND.	320 13

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Weather Quick Facts

The highest monthly average temperature in Great Falls for July is 77.7 degrees
The lowest monthly average temperature in Great Falls for January is 34.4 degrees
The most monthly precipitation in Great Falls occurs in May with 5.6 inches
The air quality index in Great Falls is 12% worse than the national average
The pollution index in Great Falls is 439% worse than the national average

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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.
Month	Temp. _(min)	Temp. _(max)	Temp. _(avg)	Precipitation
January	24°F	46°F	34°F	2.7"
February	25°F	48°F	36°F	2.1"
March	33°F	58°F	45°F	3.2"
April	43°F	71°F	56°F	3.7"
May	52°F	78°F	65°F	5.6"
June	61°F	86°F	74°F	4.5"
July	66°F	90°F	78°F	4.2"
August	65°F	88°F	76°F	2.8"
September	58°F	82°F	69°F	3.5"
October	46°F	71°F	58°F	5.4"
November	35°F	59°F	46°F	2.6"
December	29°F	50°F	39°F	3.8"

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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.
Index	Great Falls	Virginia	National
Air quality index	47	58	42
Pollution index	14,693,900	1,561,881	2,726,193

Great Falls air quality

Measurement	Total
Days measured	365
Days with good air quality	209
Days with moderate air quality	145
Days w/ poor A.Q. for sensitive groups	10
Days with unhealthy air quality	1

Air quality details

Pollutant	Total
Arsenic	0.190%
Benzene	0.210%
Carbon Tetrachloride	0.060%
Lead	0.060%
Mercury	0.010%

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	Population	Air Quality Index	National Avg.
Dulles Town Center, VA	5,362	47	6.0%
Centreville, VA	74,230	47	6.0%
Germantown, MD	89,529	47	6.0%
Poolesville, MD	5,228	47	6.0%
Bethesda, MD	65,092	47	6.0%
Great Falls, VA	14,793	47	6.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Tonawanda, NY	14,790	39	22.0%
Bluffdale, UT	14,802	51	2.0%
Winkler, MB	14,804	n/a
Sooke, BC	14,780	n/a
Eggertsville, NY	14,806	39	22.0%
Great Falls, VA	14,793	47	6.0%

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.