TODAY NOV02
TEMPERATURE53
HUMIDITY33
PRESSURE
WIND COND.237 12.9
  • 4924Sun
  • 5134Mon50%
  • 4622Tue60%
  • 4021Wed
  • 5026Thu
daynightWeather update from ROCKY BOY at
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Weather Quick Facts

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

Compare Big Sandy, MT Weather

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      Big Sandy 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"

      Big Sandy 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.
      IndexBig SandyMontanaNational
      Air quality index213442
      Pollution index250,374834,4732,726,193

      Big Sandy 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%
      Lead0.000%
      Mercury0.000%

      Average monthly Big Sandy temperature with heat index

      Big Sandy monthly precipitation with daily maximum

      Big Sandy monthly snow depth with daily maximum

      Big Sandy monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Boneau, MT2902158.0%
      Rocky Boy West, MT8362158.0%
      Box Elder, MT572158.0%
      St. Pierre, MT3572158.0%
      Sangrey, MT4182158.0%
      Big Sandy, MT6372158.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Bunker Hill, IN6373726.0%
      Clarissa, MN6372942.0%
      Eldred, PA6373530.0%
      Milano, TX6374216.0%
      Neosho, WI6373726.0%
      Big Sandy, MT6372158.0%
      Source: The Big Sandy, 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.