TODAY MAR29
TEMPERATURE
HUMIDITY
PRESSURE
WIND COND.
  • 3518Sat30%
  • 3819Sun
  • 5027Mon
  • 6136Tue
  • 6432Wed
daynightWeather update from CHINOOK at
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Weather Quick Facts

  • The highest monthly average temperature in Chinook for July is 71.7 degrees
  • The lowest monthly average temperature in Chinook for December is 18.4 degrees
  • The most monthly precipitation in Chinook occurs in June with 2.4 inches
  • The air quality index in Chinook is 50% better than the national average
  • The pollution index in Chinook is 91% better than the national average

Compare Chinook, MT Weather

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      Chinook 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
      January8°F32°F19°F0.6"
      February10°F36°F22°F0.4"
      March20°F49°F33°F0.8"
      April29°F61°F44°F1.3"
      May38°F70°F54°F2.0"
      June46°F79°F63°F2.4"
      July53°F90°F72°F1.4"
      August50°F88°F68°F1.0"
      September41°F77°F58°F1.2"
      October31°F62°F44°F1.0"
      November20°F46°F32°F0.6"
      December7°F31°F18°F0.7"

      Chinook 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.
      IndexChinookMontanaNational
      Air quality index213442
      Pollution index232,374834,4732,726,193

      Chinook air quality information

      MeasurementTotal
      Days measured363
      Days with good air quality350
      Days with moderate air quality12
      Days w/ poor A.Q. for sensitive groups1
      Days with unhealthy air quality0

      Chinook air quality information

      PollutantTotal
      Arsenic0.000%
      Benzene0.004%
      Carbon Tetrachloride0.000%
      Lead0.000%
      Mercury0.000%

      Average monthly Chinook temperature with heat index

      Chinook monthly precipitation with daily maximum

      Chinook monthly snow depth with daily maximum

      Chinook monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Chinook, MT1,2252158.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Rosedale, LA1,2254510.0%
      Watson, LA1,2254510.0%
      Archie, MO1,225476.0%
      Saint-Armand, QC1,225n/a 
      Pasatiempo, CA1,2263530.0%
      Chinook, MT1,2252158.0%
      Source: The Chinook, MT 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.