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Key findings

  • The highest monthly average temperature in Lewes for July is 78.4 degrees
  • The lowest monthly average temperature in Lewes for January is 36.8 degrees
  • The most monthly precipitation in Lewes occurs in June with 5.6 inches
  • The air quality index in Lewes is 28% better than the national average
  • The pollution index in Lewes is 42% worse than the national average

Compare Lewes, DE Weather

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      Lewes 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°F46°F37°F2.9"
      February28°F48°F38°F2.3"
      March36°F57°F46°F3.1"
      April45°F68°F56°F3.5"
      May54°F77°F65°F3.1"
      June64°F85°F74°F5.6"
      July69°F89°F78°F4.5"
      August67°F87°F76°F4.8"
      September61°F81°F70°F4.7"
      October50°F71°F60°F4.4"
      November39°F60°F49°F2.9"
      December33°F52°F42°F3.6"

      Lewes 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.
      IndexLewesDelawareNational
      Air quality index364150
      Pollution index7,219,5403,759,2125,066,862

      Lewes air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality303
      Days with moderate air quality61
      Days w/ poor A.Q. for sensitive groups1
      Days with unhealthy air quality

      Lewes air quality information

      PollutantTotal
      Arsenic0.060%
      Benzene0.070%
      Carbon Tetrachloride0.000%
      Lead0.030%
      Mercury0.110%

      Average monthly Lewes temperature with heat index

      Lewes monthly precipitation with daily maximum

      Lewes monthly snow depth with daily maximum

      Lewes monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Dewey Beach, DE2893628%
      Millsboro, DE4,1213628%
      Georgetown, DE6,9173628%
      Milton, DE2,7563628%
      Henlopen Acres, DE1593628%
      Lewes, DE2,9553628%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Ava, MO2,9553922%
      Woodlynne, NJ2,955512%
      Balmville, NY2,9543628%
      Hamilton, TX2,9544216%
      Loma Rica, CA2,9544412%
      Lewes, DE2,9553628%
      Source: The Lewes, DE 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.