TODAY MAY06
TEMPERATURE48
HUMIDITY93
PRESSURE30.18
WIND COND.
  • 6442Thu40%40%
  • 6545Fri
  • 6048Sat70%
  • 5743Sun80%50%
  • 6144Mon
daynightWeather update from Effingham, Effingham County Memorial Airport at

Key findings

  • The highest monthly average temperature in Altamont for August is 75.9 degrees
  • The lowest monthly average temperature in Altamont for January is 29.5 degrees
  • The most monthly precipitation in Altamont occurs in November with 11.8 inches
  • The air quality index in Altamont is 20% better than the national average
  • The pollution index in Altamont is 81% better than the national average

Compare Altamont, IL Weather

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      Altamont 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
      January22°F38°F30°F1.7"
      February25°F40°F32°F2.3"
      March36°F54°F44°F1.1"
      April46°F67°F55°F4.3"
      May55°F76°F64°F0.0"
      June66°F86°F75°F3.0"
      July66°F86°F75°F7.9"
      August66°F87°F76°F4.8"
      September59°F81°F69°F8.6"
      October47°F69°F57°F1.4"
      November36°F56°F46°F11.8"
      December25°F38°F31°F7.1"

      Altamont 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.
      IndexAltamontIllinoisNational
      Air quality index404150
      Pollution index959,6733,347,2955,066,862

      Altamont air quality information

      MeasurementTotal
      Days measured245
      Days with good air quality224
      Days with moderate air quality21
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Altamont air quality information

      PollutantTotal
      Arsenic0.001%
      Benzene0.040%
      Carbon Tetrachloride0.000%
      Lead0.000%
      Mercury0.002%

      Average monthly Altamont temperature with heat index

      Altamont monthly precipitation with daily maximum

      Altamont monthly snow depth with daily maximum

      Altamont monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Cowden, IL5344020%
      Brownstown, IL7104020%
      St. Peter, IL3884020%
      Shumway, IL1754020%
      Herrick, IL3584020%
      Altamont, IL2,3144020%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Mount Jackson, VA2,3143628%
      Helmetta, NJ2,3144118%
      Boron, CA2,3148978%
      New Stanton, PA2,3145612%
      Holyoke, CO2,3141962%
      Altamont, IL2,3144020%
      Source: The Altamont, IL 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.