Current weather conditions temporarily unavailable!
How would you rate the weather in St. Charles?
Write a review to give others more information about this area.
How would you rate the air quality in St. Charles?
Write a review to give others more information about this area.
See all St. Charles poll results

St. Charles 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
January12°F31°F21°F1.6"
February17°F38°F27°F1.3"
March27°F51°F38°F1.8"
April33°F61°F46°F2.3"
May39°F70°F54°F2.3"
June46°F83°F65°F1.2"
July54°F93°F74°F0.5"
August51°F90°F71°F0.8"
September43°F80°F60°F1.5"
October33°F64°F47°F1.5"
November25°F49°F36°F1.2"
December16°F34°F25°F1.2"

Did you know?

  • The highest monthly average temperature in St. Charles for July is 74 degrees.
  • The lowest monthly average temperature in St. Charles for January is 21 degrees.
  • The most monthly precipitation in St. Charles occurs in April with 2.3 inches.
  • The air quality index in St. Charles is 5% better than the national average.
  • The pollution index in St. Charles is 52% better than the national average.

Compare St. Charles, ID Weather To Other Cities

      vs

      St. Charles 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.
      IndexSt. CharlesIdahoNational
      Air quality index473250
      Pollution index2,422,6602,232,2855,066,862

      St. Charles air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality197
      Days with moderate air quality125
      Days w/ poor A.Q. for sensitive groups27
      Days with unhealthy air quality16

      St. Charles air quality information

      PollutantTotal
      Arsenic0.001%
      Benzene0.040%
      Carbon Tetrachloride0.000%
      Lead0.050%
      Mercury0.001%

      Average monthly St. Charles temperature with heat index

      St. Charles monthly precipitation with daily maximum

      St. Charles monthly snow depth with daily maximum

      St. Charles monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Garden City, UT625476%
      Bloomington, ID220476%
      Montpelier, ID2,519476%
      Paris, ID574476%
      St. Charles, ID122476%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Loomis, WA1222746%
      Havana, KS1223726%
      Okolona, AR1223138%
      Roy, MT1222452%
      Ahmeek, MI122884%
      St. Charles, ID122476%
      Source: The St. Charles, ID 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.