South West, Washington, DC Weather - Forecast & Monthly Averages

TEMPERATURE	61
HUMIDITY	78
PRESSURE	101630
WIND COND.	340 9.4

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Weather Quick Facts

The highest monthly average temperature in South West for July is 80.8 degrees
The lowest monthly average temperature in South West for January is 37.1 degrees
The most monthly precipitation in South West occurs in June with 5.3 inches
The air quality index in South West is 12% worse than the national average
The pollution index in South West is 42% better than the national average

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South West 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	28°F	47°F	37°F	2.7"
February	29°F	50°F	38°F	2.3"
March	37°F	60°F	47°F	3.2"
April	47°F	71°F	58°F	3.4"
May	56°F	78°F	67°F	4.6"
June	67°F	87°F	77°F	5.3"
July	72°F	91°F	81°F	4.2"
August	70°F	90°F	79°F	3.2"
September	63°F	83°F	72°F	3.5"
October	52°F	72°F	61°F	5.0"
November	40°F	61°F	50°F	2.5"
December	33°F	52°F	42°F	3.8"

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South West 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	South West	Washington	District of Columbia
Air quality index	47	47	49
Pollution index	1,590,970	5,554,010	5,554,010

South West air quality information

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

South West air quality information

Pollutant	Total
Arsenic	0.010%
Benzene	0.060%
Carbon Tetrachloride	0.010%
Lead	0.004%
Mercury	0.010%

Average monthly South West temperature with heat index

South West monthly precipitation with daily maximum

South West monthly snow depth with daily maximum

South West monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Riverdale Park, MD	7,216	47	6.0%
University Park, MD	2,653	47	6.0%
Garrett Park, MD	840	47	6.0%
North Bethesda, MD	49,719	47	6.0%
Wheaton, MD	51,191	47	6.0%
Washington, DC	701,974	47	6.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Vancouver, BC	694,440	n/a
Boston, MA	689,326	43	14.0%
Denver, CO	715,878	58	16.0%
El Paso, TX	679,879	53	6.0%
Detroit, MI	672,351	56	12.0%
Washington, DC	701,974	47	6.0%

Source: The South West, Washington, DC 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.