TODAY DEC22
TEMPERATURE45
HUMIDITY40
PRESSURE100880.52
WIND COND.
  • 4829Sun
  • 5127Mon
  • 4832Tue20%
  • 4625
  • 4731Thu
daynightWeather update from November at
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Weather Quick Facts

  • The highest monthly average temperature in Grass Range for July is 70.5 degrees
  • The lowest monthly average temperature in Grass Range for January is 24.9 degrees
  • The most monthly precipitation in Grass Range occurs in September with 4.6 inches
  • The air quality index in Grass Range is 50% better than the national average
  • The pollution index in Grass Range is 92% better than the national average

Compare Grass Range, MT Weather

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      Grass Range 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
      January15°F35°F25°F1.2"
      February23°F44°F32°F0.6"
      March25°F51°F37°F1.2"
      April31°F57°F43°F2.1"
      May38°F66°F51°F4.2"
      June49°F77°F63°F3.5"
      July54°F87°F71°F3.1"
      August52°F85°F68°F3.7"
      September46°F75°F59°F4.6"
      October35°F60°F46°F4.2"
      November24°F47°F35°F2.0"
      December16°F37°F26°F1.8"

      Grass Range 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.
      IndexGrass RangeMontanaNational
      Air quality index213442
      Pollution index231,483834,4732,726,193

      Grass Range air quality

      MeasurementTotal
      Days measured362
      Days with good air quality357
      Days with moderate air quality4
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality1

      Air quality details

      PollutantTotal
      Arsenic0.000%
      Benzene0.001%
      Carbon Tetrachloride0.000%
      Lead0.000%
      Mercury0.000%

      Average monthly Grass Range temperature with heat index

      Grass Range monthly precipitation with daily maximum

      Grass Range monthly snow depth with daily maximum

      Grass Range monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Grass Range, MT1212158.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Alcan Border, AK1213824.0%
      Tenakee Springs, AK1212060.0%
      Providence, AL1213628.0%
      Rondo, AR1214510.0%
      Pine Level, FL1214118.0%
      Grass Range, MT1212158.0%
      Source: The Grass Range, 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.