TODAY DEC22
TEMPERATURE45
HUMIDITY57
PRESSURE101490
WIND COND.170 27.7
  • 4525Mon
  • 3828Tue
  • 4333
  • 4739Thu40%
  • 5039Fri40%40%
daynightWeather update from Chariton at
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Weather Quick Facts

  • The highest monthly average temperature in Derby for July is 75.8 degrees
  • The lowest monthly average temperature in Derby for February is 23.7 degrees
  • The most monthly precipitation in Derby occurs in September with 10.8 inches
  • The air quality index in Derby is 7% better than the national average
  • The pollution index in Derby is 86% better than the national average

Compare Derby, IA Weather

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      Derby 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
      January15°F36°F24°F1.5"
      February15°F35°F24°F2.3"
      March30°F51°F39°F3.5"
      April41°F65°F52°F8.7"
      May52°F74°F62°F7.1"
      June62°F83°F72°F5.9"
      July66°F87°F76°F7.3"
      August63°F84°F72°F7.4"
      September54°F77°F64°F10.8"
      October43°F66°F53°F4.9"
      November30°F50°F39°F4.4"
      December22°F39°F30°F4.0"

      Derby 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.
      IndexDerbyIowaNational
      Air quality index393942
      Pollution index376,1481,154,5352,726,193

      Derby air quality

      MeasurementTotal
      Days measured365
      Days with good air quality306
      Days with moderate air quality59
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.000%
      Benzene0.010%
      Carbon Tetrachloride0.001%
      Lead0.001%
      Mercury0.000%

      Average monthly Derby temperature with heat index

      Derby monthly precipitation with daily maximum

      Derby monthly snow depth with daily maximum

      Derby monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Corydon, IA1,6593922.0%
      Millerton, IA1253922.0%
      Chariton, IA4,1273922.0%
      Garden Grove, IA2033922.0%
      Weldon, IA1453922.0%
      Derby, IA1133922.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Peterman, AL1133726.0%
      McNab, AR1133922.0%
      Sehili, AZ1131766.0%
      Guinda, CA1133138.0%
      Martell, CA1133922.0%
      Derby, IA1133922.0%
      Source: The Derby, IA 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.