TODAY AUG19
TEMPERATURE
HUMIDITY
PRESSURE
WIND COND.
  • 8269Sun20%
  • 8269Mon20%
  • 8372Tue50%60%
  • 8665Wed40%40%
  • 8163Thu
daynightWeather update from Washington/Reagan National Airport, DC at

National Harbor Average Weather

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
January28°F47°F37°F2.7"
February29°F50°F38°F2.3"
March37°F60°F47°F3.2"
April47°F71°F58°F3.4"
May56°F78°F67°F4.6"
June67°F87°F77°F5.3"
July72°F91°F81°F4.2"
August70°F90°F79°F3.2"
September63°F83°F72°F3.5"
October52°F72°F61°F5.0"
November40°F61°F50°F2.5"
December33°F52°F42°F3.8"

Did you know?

  • The highest monthly average temperature in National Harbor for July is 81 degrees.
  • The lowest monthly average temperature in National Harbor for January is 37 degrees.
  • The most monthly precipitation in National Harbor occurs in June with 5.3 inches.
  • The air quality index in National Harbor is 1% better than the national average.
  • The pollution index in National Harbor is 45% better than the national average.

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Compare National Harbor, MD Weather To Other Cities

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.
IndexNational HarborMarylandNational
Air quality index494350
Pollution index2,776,5906,283,4705,066,862

National Harbor 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

National Harbor air quality information

PollutantTotal
Arsenic0.070%
Benzene0.020%
Carbon Tetrachloride0.010%
Lead0.020%
Mercury0.030%

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, StatePopulationAir Quality IndexNational Avg.
Adelphi, MD15,554492%
Berwyn Heights, MD3,242492%
Brentwood, MD3,144492%
Cabin John, MD1,958492%
Cheverly, MD6,390492%
National Harbor, MD4,279492%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Sparta, MI4,2803922%
Slatington, PA4,278476%
Spackenkill, NY4,2803628%
University Gardens, NY4,280536%
Point Pleasant, WV4,2813334%
National Harbor, MD4,279492%
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.