TODAY APR17
TEMPERATURE46
HUMIDITY76
PRESSURE29.98
WIND COND.20 14.8
  • 6141Sun20%
  • 6035Mon20%
  • 4029Tue50%
  • 4331Wed
  • 5337Thu
daynightWeather update from Gary Regional Airport at

Key findings

  • The highest monthly average temperature in Merrillville for July is 75.8 degrees
  • The lowest monthly average temperature in Merrillville for January is 28.6 degrees
  • The most monthly precipitation in Merrillville occurs in July with 9.5 inches
  • The air quality index in Merrillville is 26% better than the national average
  • The pollution index in Merrillville is 69% better than the national average

Compare Merrillville, IN Weather

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      Merrillville 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°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"

      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 index375650
      Pollution index1,558,0703,773,6185,066,862

      Merrillville air quality information

      MeasurementTotal
      Days measured364
      Days with good air quality305
      Days with moderate air quality55
      Days w/ poor A.Q. for sensitive groups4
      Days with unhealthy air quality0

      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.
      Aberdeen, IN1,7713726%
      Hebron, IN4,0413726%
      New Chicago, IN1,8053726%
      South Haven, IN5,0423726%
      Ogden Dunes, IN1,1383726%
      Merrillville, IN35,2683726%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Roseville, MN35,254468%
      Torrington, CT35,2273726%
      Oak Creek, WI35,2183922%
      Olney, MD35,336476%
      Mooresville, NC35,3874020%
      Merrillville, IN35,2683726%
      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.