TODAY NOV22
TEMPERATURE46
HUMIDITY80
PRESSURE101730
WIND COND.320 20.5
  • 4233Sat
  • 4938Sun
  • 4023Mon
  • 3423Tue
  • 3624Wed30%
daynightWeather update from Middleton Muni - Morey Field at
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Weather Quick Facts

  • The highest monthly average temperature in Walnut Grove for July is 77.8 degrees
  • The lowest monthly average temperature in Walnut Grove for January is 22.1 degrees
  • The most monthly precipitation in Walnut Grove occurs in October with 8.9 inches
  • The air quality index in Walnut Grove is 7% better than the national average
  • The pollution index in Walnut Grove is 37% better than the national average

Compare Madison, WI Weather

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      Walnut Grove 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°F31°F22°F2.9"
      February18°F35°F26°F1.6"
      March30°F49°F38°F2.6"
      April38°F61°F48°F5.8"
      May50°F74°F61°F5.4"
      June59°F83°F71°F6.3"
      July66°F90°F78°F3.9"
      August61°F85°F72°F5.2"
      September51°F74°F62°F2.8"
      October40°F63°F51°F8.9"
      November33°F51°F41°F2.9"
      December20°F35°F27°F3.2"

      Walnut Grove 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.
      IndexWalnut GroveMadisonWisconsin
      Air quality index393969
      Pollution index1,728,8201,728,8202,842,418

      Walnut Grove 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
      Arsenic0.003%
      Benzene0.030%
      Carbon Tetrachloride0.001%
      Lead0.001%
      Mercury0.002%

      Average monthly Walnut Grove temperature with heat index

      Walnut Grove monthly precipitation with daily maximum

      Walnut Grove monthly snow depth with daily maximum

      Walnut Grove monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Sauk City, WI3,4813530.0%
      Windsor, WI7,3403922.0%
      McFarland, WI8,8453922.0%
      Oregon, WI10,5133922.0%
      Verona, WI13,2153922.0%
      Madison, WI258,3663922.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Burnaby, BC258,827n/a 
      Kitchener, ON259,162n/a 
      Chandler, AZ257,0767448.0%
      Lubbock, TX257,0132550.0%
      Laredo, TX260,5714118.0%
      Madison, WI258,3663922.0%
      Source: The Walnut Grove, Madison, WI 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.