TODAY DEC22
TEMPERATURE29
HUMIDITY75
PRESSURE101730
WIND COND.140 9.4
  • 3423Mon70%
  • 3225Tue
  • 3529
  • 3933Thu20%
  • 4535Fri40%40%
daynightWeather update from Sparta, Sparta / Fort McCoy Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Norwalk for July is 70.5 degrees
  • The lowest monthly average temperature in Norwalk for January is 18.2 degrees
  • The most monthly precipitation in Norwalk occurs in July with 6.2 inches
  • The air quality index in Norwalk is 17% better than the national average
  • The pollution index in Norwalk is 24% better than the national average

Compare Norwalk, WI Weather

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      Norwalk 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
      January8°F28°F18°F1.0"
      February9°F30°F20°F0.6"
      March24°F46°F34°F1.5"
      April34°F59°F46°F3.7"
      May44°F71°F57°F4.5"
      June54°F80°F67°F5.6"
      July57°F84°F71°F6.2"
      August56°F81°F68°F4.8"
      September48°F74°F60°F5.4"
      October37°F61°F48°F3.4"
      November27°F46°F36°F1.5"
      December14°F32°F23°F2.3"

      Norwalk 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.
      IndexNorwalkWisconsinNational
      Air quality index356942
      Pollution index2,073,1702,842,4182,726,193

      Norwalk air quality

      MeasurementTotal
      Days measured365
      Days with good air quality310
      Days with moderate air quality55
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.030%
      Benzene0.020%
      Carbon Tetrachloride0.001%
      Lead0.010%
      Mercury0.040%

      Average monthly Norwalk temperature with heat index

      Norwalk monthly precipitation with daily maximum

      Norwalk monthly snow depth with daily maximum

      Norwalk monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Ontario, WI4773530.0%
      Westby, WI2,3873530.0%
      Wilton, WI5423530.0%
      Cashton, WI9613530.0%
      Rockland, WI5953530.0%
      Norwalk, WI7133530.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Caddo Valley, AR7133236.0%
      Round Valley, AZ7136020.0%
      Hanover, IL7134216.0%
      Parkway Village, KY713492.0%
      North Brentwood, MD713476.0%
      Norwalk, WI7133530.0%
      Source: The Norwalk, 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.