TODAY MAR02
TEMPERATURE36
HUMIDITY35
PRESSURE30.35
WIND COND.310 20.5
  • 5736Wed
  • 5028Thu
  • 4630Fri
  • 4830Sat
  • 5132Sun
daynightWeather update from Washington/Reagan National Airport, DC at

Key findings

  • The highest monthly average temperature in Capitol Hill for July is 81 degrees
  • The lowest monthly average temperature in Capitol Hill for January is 37 degrees
  • The most monthly precipitation in Capitol Hill occurs in June with 5.3 inches
  • The air quality index in Capitol Hill is 5% better than the national average
  • The pollution index in Capitol Hill is 10% worse than the national average

Compare Washington, DC Weather

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      Capitol Hill 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"

      Capitol Hill 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.
      IndexCapitol HillWashingtonDistrict of Columbia
      Air quality index474749
      Pollution index5,554,0105,554,0105,554,010

      Capitol Hill 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

      Capitol Hill air quality information

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

      Average monthly Capitol Hill temperature with heat index

      Capitol Hill monthly precipitation with daily maximum

      Capitol Hill monthly snow depth with daily maximum

      Capitol Hill monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Maryland City, MD17,647468%
      Lake Arbor, MD10,380476%
      Melwood, MD3,239476%
      Westphalia, MD7,735476%
      Forest Heights, MD2,549476%
      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 Capitol Hill, 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.