TODAY AUG21
TEMPERATURE72
HUMIDITY88
PRESSURE29.85
WIND COND.340 26.4
  • 7661Tue50%40%
  • 7457Wed20%
  • 7959Thu
  • 7765Fri
  • 8570Sat
daynightWeather update from Gary Regional Airport at

Merrillville 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
January22°F35°F29°F3.1"
February22°F36°F29°F1.8"
March34°F49°F41°F8.5"
April43°F62°F52°F4.3"
May53°F72°F62°F7.9"
June62°F80°F71°F3.6"
July67°F83°F76°F9.5"
August65°F82°F74°F6.3"
September58°F76°F67°F7.6"
October47°F65°F56°F8.0"
November37°F52°F44°F5.7"
December27°F39°F33°F2.7"

Did you know?

  • The highest monthly average temperature in Merrillville for July is 76 degrees.
  • The lowest monthly average temperature in Merrillville for January is 29 degrees.
  • The most monthly precipitation in Merrillville occurs in July with 9.5 inches.
  • The air quality index in Merrillville is 37% better than the national average.
  • The pollution index in Merrillville is 69% better than the national average.

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Compare Merrillville, IN Weather To Other Cities

Merrillville 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.
IndexMerrillvilleIndianaNational
Air quality index315650
Pollution index1,558,0703,773,6185,066,862

Merrillville air quality information

MeasurementTotal
Days measured365
Days with good air quality310
Days with moderate air quality53
Days w/ poor A.Q. for sensitive groups2
Days with unhealthy air quality

Merrillville air quality information

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

Average monthly Merrillville temperature with heat index

Merrillville monthly precipitation with daily maximum

Merrillville monthly snow depth with daily maximum

Merrillville monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Hobart, IN28,6933138%
Portage, IN37,0543138%
Wheeler, IN3023138%
Chesterton, IN13,9123138%
Hebron, IN4,0413138%
Merrillville, IN35,2683138%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Roseville, MN35,2544412%
Torrington, CT35,2273922%
Oak Creek, WI35,2183530%
Olney, MD35,336492%
Mooresville, NC35,3874020%
Merrillville, IN35,2683138%
Source: The Merrillville, 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.