TODAY MAR19
TEMPERATURE30
HUMIDITY55
PRESSURE101590
WIND COND.210 24.1
  • 6027Tue
  • 4224Wed
  • 4831Thu20%30%
  • 4824Fri
  • 4230Sat
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Weather Quick Facts

  • The highest monthly average temperature in Walnut for July is 78.2 degrees
  • The lowest monthly average temperature in Walnut for January is 23.9 degrees
  • The most monthly precipitation in Walnut occurs in August with 6.1 inches
  • The air quality index in Walnut is 5% better than the national average
  • The pollution index in Walnut is 60% worse than the national average

Compare Walnut, IA Weather

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      Walnut 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
      January14°F37°F24°F0.6"
      February16°F41°F27°F0.9"
      March29°F56°F41°F1.5"
      April40°F67°F53°F3.8"
      May50°F77°F63°F5.2"
      June62°F87°F74°F4.9"
      July66°F91°F78°F3.1"
      August64°F88°F75°F6.1"
      September55°F82°F67°F3.7"
      October42°F69°F54°F3.0"
      November29°F55°F41°F1.0"
      December17°F39°F27°F1.7"

      Walnut 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.
      IndexWalnutIowaNational
      Air quality index403942
      Pollution index4,349,9301,154,5352,726,193

      Walnut air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality283
      Days with moderate air quality82
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Walnut air quality information

      PollutantTotal
      Arsenic0.210%
      Benzene0.040%
      Carbon Tetrachloride0.004%
      Lead0.100%
      Mercury0.160%

      Average monthly Walnut temperature with heat index

      Walnut monthly precipitation with daily maximum

      Walnut monthly snow depth with daily maximum

      Walnut monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Oakland, IA1,6654020.0%
      Jacksonville, IA104020.0%
      Atlantic, IA6,6004020.0%
      Corley, IA74020.0%
      Kimballton, IA2754020.0%
      Walnut, IA7464020.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Watkins, CO7465816.0%
      Corydon, KY7464510.0%
      Hancock, MN7463236.0%
      Holcomb, MO7462648.0%
      Wood Heights, MO746476.0%
      Walnut, IA7464020.0%
      Source: The Walnut, 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.