TODAY JUL27
TEMPERATURE
HUMIDITY
PRESSURE
WIND COND.
  • 9072Wed20%
  • 8764Thu70%50%
  • 7658Fri
  • 8163Sat
  • 7959Sun
daynightWeather update from Lansing Municipal Airport at

Key findings

  • The highest monthly average temperature in St. John for July is 74 degrees
  • The lowest monthly average temperature in St. John for January is 25.6 degrees
  • The most monthly precipitation in St. John occurs in July with 8 inches
  • The air quality index in St. John is 11% worse than the national average
  • The pollution index in St. John is 69% better than the national average

Compare St. John, IN Weather

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      St. John 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
      January18°F34°F26°F4.5"
      February19°F35°F27°F3.6"
      March31°F49°F39°F4.4"
      April40°F62°F50°F5.4"
      May50°F72°F60°F6.5"
      June60°F81°F70°F5.8"
      July64°F84°F74°F8.0"
      August63°F82°F72°F7.5"
      September56°F76°F65°F5.4"
      October45°F64°F54°F6.2"
      November33°F51°F42°F5.4"
      December24°F38°F31°F3.8"

      St. John 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. JohnIndianaNational
      Air quality index555650
      Pollution index1,558,0703,773,6185,066,862

      St. John air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality121
      Days with moderate air quality227
      Days w/ poor A.Q. for sensitive groups16
      Days with unhealthy air quality1

      St. John air quality information

      PollutantTotal
      Arsenic0.010%
      Benzene0.010%
      Carbon Tetrachloride0.070%
      Lead0.090%
      Mercury0.010%

      Average monthly St. John temperature with heat index

      St. John monthly precipitation with daily maximum

      St. John monthly snow depth with daily maximum

      St. John monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Merrillville, IN35,2683726%
      Hebron, IN4,0413726%
      New Chicago, IN1,8053726%
      Crown Point, IN28,7433726%
      Hobart, IN28,6933726%
      St. John, IN15,7775510%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Ladson, SC15,7763824%
      Kingstowne, VA15,779476%
      Upper Grand Lagoon, FL15,7713824%
      Grosse Pointe Woods, MI15,7855612%
      Great Falls, VA15,786476%
      St. John, IN15,7775510%
      Source: The St. John, IN 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.