TODAY DEC22
TEMPERATURE47
HUMIDITY33
PRESSURE
WIND COND.273 22.5
  • 5225Mon20%
  • 4928Tue
  • 4627
  • 4628Thu
  • 4827Fri
daynightWeather update from GREENFIELDS at
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Weather Quick Facts

  • The highest monthly average temperature in Sun River for July is 68.5 degrees
  • The lowest monthly average temperature in Sun River for December is 22.1 degrees
  • The most monthly precipitation in Sun River occurs in September with 4.6 inches
  • The air quality index in Sun River is 50% better than the national average
  • The pollution index in Sun River is 90% better than the national average

Compare Sun River, MT Weather

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      Sun River 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°F24°F0.7"
      February23°F48°F35°F0.6"
      March27°F55°F40°F0.8"
      April32°F60°F45°F2.5"
      May37°F64°F50°F3.5"
      June47°F77°F62°F4.5"
      July51°F86°F69°F2.5"
      August49°F83°F66°F3.3"
      September41°F71°F55°F4.6"
      October35°F61°F47°F1.7"
      November24°F47°F35°F1.4"
      December12°F33°F22°F1.0"

      Sun River 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.
      IndexSun RiverMontanaNational
      Air quality index213442
      Pollution index260,100834,4732,726,193

      Sun River 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%
      Benzene0.004%
      Carbon Tetrachloride0.000%
      Lead0.002%
      Mercury0.000%

      Average monthly Sun River temperature with heat index

      Sun River monthly precipitation with daily maximum

      Sun River monthly snow depth with daily maximum

      Sun River monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Fairfield, MT6902158.0%
      Ulm, MT7502158.0%
      Fort Shaw, MT1382158.0%
      Vaughn, MT8772158.0%
      Simms, MT3382158.0%
      Sun River, MT412158.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Tatitlek, AK413138.0%
      Tinsman, AR413530.0%
      Two Buttes, CO412060.0%
      Conway, IA414314.0%
      Irvington, IA411570.0%
      Sun River, MT412158.0%
      Source: The Sun River, 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.