TODAY NOV08
TEMPERATURE69
HUMIDITY53
PRESSURE102000
WIND COND.330 13
  • 7241Fri
  • 5737Sat
  • 5650Sun20%90%
  • 694660%
  • 5839Tue
daynightWeather update from Washington/Dulles International Airport, DC at
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Weather Quick Facts

  • The highest monthly average temperature in Darnestown for July is 75.6 degrees
  • The lowest monthly average temperature in Darnestown for January is 31.4 degrees
  • The most monthly precipitation in Darnestown occurs in October with 9.4 inches
  • The air quality index in Darnestown is 12% worse than the national average
  • The pollution index in Darnestown is 439% worse than the national average

Compare Darnestown, MD Weather

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      Darnestown 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
      January24°F41°F31°F4.1"
      February26°F44°F34°F5.6"
      March34°F55°F43°F6.4"
      April44°F68°F55°F6.1"
      May55°F76°F64°F9.2"
      June63°F84°F72°F6.0"
      July66°F87°F76°F5.5"
      August64°F85°F73°F7.7"
      September58°F79°F67°F7.6"
      October46°F67°F55°F9.4"
      November36°F55°F44°F5.4"
      December30°F46°F37°F6.8"

      Darnestown 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.
      IndexDarnestownMarylandNational
      Air quality index474342
      Pollution index14,693,9005,342,3672,726,193

      Darnestown air quality

      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

      Air quality details

      PollutantTotal
      Arsenic0.190%
      Benzene0.210%
      Carbon Tetrachloride0.060%
      Lead0.060%
      Mercury0.010%

      Average monthly Darnestown temperature with heat index

      Darnestown monthly precipitation with daily maximum

      Darnestown monthly snow depth with daily maximum

      Darnestown monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Point of Rocks, MD2,0674020.0%
      McNair, VA20,776476.0%
      Derwood, MD1,644476.0%
      Montgomery Village, MD34,413476.0%
      Washington Grove, MD710476.0%
      Darnestown, MD6,754476.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Lemoore Station, CA6,7565612.0%
      Allendale, NJ6,757512.0%
      Rumson, NJ6,757512.0%
      Kingston, MA6,7504314.0%
      Parkwood, WA6,7581864.0%
      Darnestown, MD6,754476.0%
      Source: The Darnestown, 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.