TODAY APR19
TEMPERATURE44
HUMIDITY89
PRESSURE101690
WIND COND.280 5.4
  • 5232Fri
  • 4931Sat
  • 5836Sun
  • 6246Mon80%
  • 5731Tue80%60%
daynightWeather update from Madison, Dane County Regional-Truax Field at
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Weather Quick Facts

  • The highest monthly average temperature in Rio for July is 73.1 degrees
  • The lowest monthly average temperature in Rio for January is 20.4 degrees
  • The most monthly precipitation in Rio occurs in June with 5.9 inches
  • The air quality index in Rio is 5% better than the national average
  • The pollution index in Rio is 16% worse than the national average

Compare Rio, WI Weather

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      Rio 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
      January11°F30°F20°F1.5"
      February13°F33°F23°F1.5"
      March24°F47°F35°F2.6"
      April35°F61°F48°F4.4"
      May46°F73°F59°F4.0"
      June57°F81°F69°F5.9"
      July60°F85°F73°F4.9"
      August59°F83°F71°F4.8"
      September51°F77°F63°F3.5"
      October40°F63°F51°F3.2"
      November28°F49°F38°F2.1"
      December17°F34°F25°F2.3"

      Rio 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.
      IndexRioWisconsinNational
      Air quality index406942
      Pollution index3,153,9502,842,4182,726,193

      Rio air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality297
      Days with moderate air quality67
      Days w/ poor A.Q. for sensitive groups1
      Days with unhealthy air quality0

      Rio air quality information

      PollutantTotal
      Arsenic0.010%
      Benzene0.050%
      Carbon Tetrachloride0.002%
      Lead0.002%
      Mercury0.150%

      Average monthly Rio temperature with heat index

      Rio monthly precipitation with daily maximum

      Rio monthly snow depth with daily maximum

      Rio monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Wyocena, WI7323530.0%
      Poynette, WI2,5073530.0%
      Lodi, WI3,0733530.0%
      Pardeeville, WI2,0463530.0%
      Portage, WI10,4123530.0%
      Rio, WI1,0494020.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Skyline, AL1,0494412.0%
      Herald, CA1,0494510.0%
      Saybrook Manor, CT1,0493726.0%
      Canon, GA1,0494118.0%
      Onset, MA1,0493628.0%
      Rio, WI1,0494020.0%
      Source: The Rio, 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.