TODAY NOV25
TEMPERATURE43
HUMIDITY76
PRESSURE102130
WIND COND.360 35.3
  • 5746Tue
  • 6935Wed
  • 5026
  • 5236Fri
  • 5627Sat
daynightWeather update from Duncan, Halliburton Field Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Duncan for August is 85.8 degrees
  • The lowest monthly average temperature in Duncan for December is 40.8 degrees
  • The most monthly precipitation in Duncan occurs in August with 18.1 inches
  • The air quality index in Duncan is 2% worse than the national average
  • The pollution index in Duncan is 67% better than the national average

Compare Duncan, OK Weather

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      Duncan 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
      January33°F52°F42°F5.9"
      February37°F55°F47°F2.2"
      March49°F68°F59°F14.4"
      April52°F71°F63°F4.9"
      May63°F79°F72°F11.9"
      June70°F88°F80°F13.6"
      July73°F91°F83°F7.2"
      August74°F94°F86°F18.1"
      September67°F87°F79°F5.9"
      October54°F76°F66°F4.9"
      November43°F68°F55°F1.6"
      December31°F52°F41°F4.4"

      Duncan 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.
      IndexDuncanOklahomaNational
      Air quality index435542
      Pollution index906,6931,271,5332,726,193

      Duncan air quality

      MeasurementTotal
      Days measured365
      Days with good air quality285
      Days with moderate air quality80
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.000%
      Benzene0.010%
      Carbon Tetrachloride0.002%
      Lead0.000%
      Mercury0.000%

      Average monthly Duncan temperature with heat index

      Duncan monthly precipitation with daily maximum

      Duncan monthly snow depth with daily maximum

      Duncan monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Central High, OK1,5074314.0%
      Meridian town, OK364314.0%
      Marlow, OK4,4554314.0%
      Meridian, OK134314.0%
      Comanche, OK1,8964314.0%
      Duncan, OK22,5294314.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      South Lake Tahoe, CA22,5351374.0%
      Hopewell, VA22,5004412.0%
      Greenfield, IN22,561548.0%
      Silver Firs, WA22,5644510.0%
      Dolton, IL22,4875510.0%
      Duncan, OK22,5294314.0%
      Source: The Duncan, OK 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.