TODAY MAY24
TEMPERATURE52
HUMIDITY76
PRESSURE101250
WIND COND.
  • 7549Fri40%80%
  • 7252Sat
  • 6652Sun40%70%
  • 645150%50%
  • 6848Tue30%40%
daynightWeather update from Waukesha County Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Sussex for July is 70.3 degrees
  • The lowest monthly average temperature in Sussex for January is 20.8 degrees
  • The most monthly precipitation in Sussex occurs in June with 19.6 inches
  • The air quality index in Sussex is 5% worse than the national average
  • The pollution index in Sussex is 530% worse than the national average

Compare Sussex, WI Weather

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      Sussex 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°F28°F21°F0.6"
      February15°F29°F22°F2.8"
      March27°F43°F34°F2.9"
      April37°F55°F45°F3.1"
      May47°F67°F56°F8.9"
      June56°F76°F66°F19.6"
      July61°F80°F70°F14.9"
      August60°F78°F69°F2.3"
      September53°F72°F61°F10.4"
      October42°F59°F50°F6.6"
      November31°F46°F38°F3.6"
      December20°F32°F26°F1.8"

      Sussex 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.
      IndexSussexWisconsinNational
      Air quality index446942
      Pollution index17,168,0002,842,4182,726,193

      Sussex air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality254
      Days with moderate air quality108
      Days w/ poor A.Q. for sensitive groups3
      Days with unhealthy air quality0

      Sussex air quality information

      PollutantTotal
      Arsenic0.030%
      Benzene0.160%
      Carbon Tetrachloride0.050%
      Lead0.160%
      Mercury0.150%

      Average monthly Sussex temperature with heat index

      Sussex monthly precipitation with daily maximum

      Sussex monthly snow depth with daily maximum

      Sussex monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Delafield, WI7,5413726.0%
      Ashippun, WI1,0273726.0%
      Oconomowoc Lake, WI6213726.0%
      Nashotah, WI1,2873726.0%
      Chenequa, WI5833726.0%
      Sussex, WI10,8844412.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      River Forest, IL10,8835510.0%
      Kings Mountain, NC10,8853628.0%
      Malvern, AR10,8863824.0%
      Camden, AR10,8773530.0%
      Manchester, TN10,896468.0%
      Sussex, WI10,8844412.0%
      Source: The Sussex, 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.