TODAY MAY16
TEMPERATURE72
HUMIDITY40
PRESSURE30.27
WIND COND.170 16.6
  • 7554Mon
  • 8158Tue
  • 8662Wed
  • 9065Thu
  • 9168Fri
daynightWeather update from Washington/Reagan National Airport, DC at

Key findings

  • The highest monthly average temperature in Washington for July is 80.8 degrees
  • The lowest monthly average temperature in Washington for January is 37.1 degrees
  • The most monthly precipitation in Washington occurs in June with 5.3 inches
  • The air quality index in Washington is 5% better than the national average
  • The pollution index in Washington is 10% worse than the national average

Compare Washington, DC Weather

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      Washington 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
      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"

      Washington 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.
      IndexWashingtonDistrict of ColumbiaNational
      Air quality index474950
      Pollution index5,554,0105,554,0105,066,862

      Washington air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality209
      Days with moderate air quality145
      Days w/ poor A.Q. for sensitive groups10
      Days with unhealthy air quality1

      Washington air quality information

      PollutantTotal
      Arsenic0.010%
      Benzene0.060%
      Carbon Tetrachloride0.010%
      Lead0.004%
      Mercury0.010%

      Average monthly Washington temperature with heat index

      Washington monthly precipitation with daily maximum

      Washington monthly snow depth with daily maximum

      Washington monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Maryland City, MD17,647468%
      Fort Meade, MD9,730468%
      Kings Park, VA4,687476%
      Newington Forest, VA12,262476%
      Wakefield town, VA810476%
      Washington, DC659,009476%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Boston, MA658,2794314%
      Memphis, TN655,8574510%
      Denver, CO663,3035816%
      Seattle, WA668,8494510%
      Nashville, TN643,7714510%
      Washington, DC659,009476%
      Source: The 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.