TODAY AUG20
TEMPERATURE67
HUMIDITY85
PRESSURE29.92
WIND COND.110 6.9
  • 7659Tue40%30%
  • 7656Wed
  • 7859Thu
  • 7864Fri
  • 8468Sat
daynightWeather update from Lansing Municipal Airport at

St. John Average Weather

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"

Did you know?

  • The highest monthly average temperature in St. John for July is 74 degrees.
  • The lowest monthly average temperature in St. John for January is 26 degrees.
  • The most monthly precipitation in St. John occurs in July with 8 inches.
  • The air quality index in St. John is 20% worse than the national average.
  • The pollution index in St. John is 69% better than the national average.

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Compare St. John, IN Weather To Other Cities

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 index605650
Pollution index1,558,0703,773,6185,066,862

St. John air quality information

MeasurementTotal
Days measured365
Days with good air quality72
Days with moderate air quality281
Days w/ poor A.Q. for sensitive groups11
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.
Hobart, IN28,6933138%
Ogden Dunes, IN1,1383138%
Hebron, IN4,0413138%
Lake Dalecarlia, IN1,5083138%
Merrillville, IN35,2683138%
St. John, IN15,7776020%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Ladson, SC15,7763628%
Kingstowne, VA15,779492%
Upper Grand Lagoon, FL15,7713726%
Grosse Pointe Woods, MI15,785524%
Great Falls, VA15,786492%
St. John, IN15,7776020%
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.