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Key findings

  • The highest monthly average temperature in Sidney for July is 72.4 degrees
  • The lowest monthly average temperature in Sidney for December is 16.6 degrees
  • The most monthly precipitation in Sidney occurs in May with 7 inches
  • The air quality index in Sidney is 32% better than the national average
  • The pollution index in Sidney is 88% better than the national average

Compare Sidney, MT Weather

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      Sidney 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
      January9°F29°F18°F0.7"
      February10°F31°F19°F1.0"
      March22°F46°F32°F1.1"
      April32°F59°F44°F3.5"
      May43°F70°F55°F7.0"
      June52°F80°F65°F5.2"
      July59°F88°F72°F3.7"
      August56°F86°F69°F3.6"
      September46°F76°F59°F3.6"
      October34°F59°F45°F2.2"
      November20°F43°F30°F1.0"
      December8°F27°F17°F0.8"

      Sidney 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.
      IndexSidneyMontanaNational
      Air quality index343450
      Pollution index330,429834,4732,726,193

      Sidney air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality309
      Days with moderate air quality53
      Days w/ poor A.Q. for sensitive groups3
      Days with unhealthy air quality0

      Sidney air quality information

      PollutantTotal
      Arsenic0.000%
      Benzene0.005%
      Carbon Tetrachloride0.000%
      Lead0.000%
      Mercury0.000%

      Average monthly Sidney temperature with heat index

      Sidney monthly precipitation with daily maximum

      Sidney monthly snow depth with daily maximum

      Sidney monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Fairview, MT7803432.0%
      East Fairview, ND653432.0%
      Crane, MT2513432.0%
      Sidney, MT6,4073432.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Gladewater, TX6,4073726.0%
      Bartonville, IL6,4064118.0%
      Farr West, UT6,4064510.0%
      Tweed, ON6,406n/a 
      Wainwright, AB6,405n/a 
      Sidney, MT6,4073432.0%
      Source: The Sidney, 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.