National Harbor, MD Weather - Forecast & Monthly Averages

TEMPERATURE	54
HUMIDITY	43
PRESSURE	100240
WIND COND.	270 16.6

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Weather Quick Facts

The highest monthly average temperature in National Harbor for July is 80.8 degrees
The lowest monthly average temperature in National Harbor for January is 37.1 degrees
The most monthly precipitation in National Harbor occurs in June with 5.3 inches
The air quality index in National Harbor is 12% worse than the national average
The pollution index in National Harbor is 2% worse than the national average

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National Harbor 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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National Harbor 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	National Harbor	Maryland	National
Air quality index	47	43	42
Pollution index	2,776,590	5,342,367	2,726,193

National Harbor 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	0.070%
Benzene	0.020%
Carbon Tetrachloride	0.010%
Lead	0.020%
Mercury	0.030%

Average monthly National Harbor temperature with heat index

National Harbor monthly precipitation with daily maximum

National Harbor monthly snow depth with daily maximum

National Harbor monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Burke, VA	44,077	47	6.0%
Mantua, VA	7,784	47	6.0%
Vienna, VA	16,532	47	6.0%
Annandale, VA	42,240	47	6.0%
Groveton, VA	14,664	47	6.0%
National Harbor, MD	3,998	47	6.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Sparwood, BC	3,999	n/a
Danielson, CT	3,996	33	34.0%
Eldorado, IL	4,000	43	14.0%
Bloomfield Hills, MI	3,995	56	12.0%
La Pocatière, QC	4,001	n/a
National Harbor, MD	3,998	47	6.0%

Source: The National Harbor, MD 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.