TODAY NOV21
TEMPERATURE19
HUMIDITY87
PRESSURE
WIND COND.23 12.9
  • 1915Fri100%90%
  • 234Sat90%70%
  • 12-5Sun40%
  • 121Mon
  • 224Tue
daynightWeather update from Sweetgrass I-15 MP 395.3 at
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Weather Quick Facts

  • The highest monthly average temperature in Sweet Grass for July is 65.8 degrees
  • The lowest monthly average temperature in Sweet Grass for December is 17.8 degrees
  • The most monthly precipitation in Sweet Grass occurs in June with 3.4 inches
  • The air quality index in Sweet Grass is 50% better than the national average
  • The pollution index in Sweet Grass is 92% better than the national average

Compare Sweet Grass, MT Weather

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      Sweet Grass 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
      January11°F35°F21°F0.4"
      February12°F37°F23°F0.4"
      March21°F46°F32°F0.5"
      April28°F57°F41°F1.4"
      May36°F66°F51°F1.8"
      June44°F74°F58°F3.4"
      July49°F84°F66°F1.0"
      August47°F82°F63°F1.2"
      September40°F72°F54°F1.5"
      October30°F59°F42°F1.4"
      November20°F45°F30°F1.6"
      December7°F30°F18°F0.9"

      Sweet Grass 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.
      IndexSweet GrassMontanaNational
      Air quality index213442
      Pollution index217,967834,4732,726,193

      Sweet Grass air quality

      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

      Air quality details

      PollutantTotal
      Arsenic0.000%
      Benzene0.003%
      Carbon Tetrachloride0.000%
      Lead0.003%
      Mercury0.000%

      Average monthly Sweet Grass temperature with heat index

      Sweet Grass monthly precipitation with daily maximum

      Sweet Grass monthly snow depth with daily maximum

      Sweet Grass monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Sunburst, MT3922158.0%
      Sweet Grass, MT562158.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Hughes, AK563824.0%
      Northway Junction, AK563824.0%
      Shageluk, AK563138.0%
      Beedeville, AR564510.0%
      Aspen Springs, CA56476.0%
      Sweet Grass, MT562158.0%
      Source: The Sweet Grass, 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.