TODAY OCT10
TEMPERATURE72
HUMIDITY46
PRESSURE102200
WIND COND.
  • 8757Fri
  • 7748Sat
  • 6739Sun
  • 5934
  • 5934Tue
daynightWeather update from Muscatine at
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Weather Quick Facts

  • The highest monthly average temperature in Letts for July is 75.4 degrees
  • The lowest monthly average temperature in Letts for January is 22.5 degrees
  • The most monthly precipitation in Letts occurs in June with 6.1 inches
  • The air quality index in Letts is 24% better than the national average
  • The pollution index in Letts is 64% better than the national average

Compare Letts, IA Weather

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      Letts 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°F32°F23°F1.0"
      February17°F35°F25°F1.1"
      March30°F51°F39°F2.4"
      April41°F64°F52°F4.8"
      May51°F74°F62°F4.6"
      June62°F84°F73°F6.1"
      July66°F86°F75°F4.7"
      August64°F84°F73°F4.5"
      September55°F78°F66°F3.3"
      October43°F65°F53°F3.3"
      November31°F51°F40°F1.9"
      December19°F35°F27°F1.9"

      Letts 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.
      IndexLettsIowaNational
      Air quality index323942
      Pollution index975,8071,154,5352,726,193

      Letts air quality

      MeasurementTotal
      Days measured365
      Days with good air quality300
      Days with moderate air quality65
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.150%
      Benzene0.010%
      Carbon Tetrachloride0.001%
      Lead0.040%
      Mercury0.150%

      Average monthly Letts temperature with heat index

      Letts monthly precipitation with daily maximum

      Letts monthly snow depth with daily maximum

      Letts monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Columbus Junction, IA2,2603236.0%
      Wapello, IA1,8983236.0%
      Conesville, IA5343236.0%
      Cotter, IA213236.0%
      Winfield, IA1,0353236.0%
      Letts, IA3343236.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Eckley, CO3344510.0%
      Kapalua, HI3341570.0%
      Crawfordsville, IA3343236.0%
      Bazine, KS3341570.0%
      Clarks, NE3341962.0%
      Letts, IA3343236.0%
      Source: The Letts, 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.