TODAY NOV07
TEMPERATURE18
HUMIDITY83
PRESSURE
WIND COND.178 8
  • 5529Fri
  • 5734Sat
  • 6031Sun
  • 613740%
  • 5229Tue30%
daynightWeather update from LITTLE BIGHORN at
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Weather Quick Facts

  • The highest monthly average temperature in Custer for July is 74.8 degrees
  • The lowest monthly average temperature in Custer for December is 25.3 degrees
  • The most monthly precipitation in Custer occurs in May with 3 inches
  • The air quality index in Custer is 50% better than the national average
  • The pollution index in Custer is 95% better than the national average

Compare Custer, MT Weather

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      Custer 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
      January17°F39°F27°F0.5"
      February19°F43°F29°F0.5"
      March27°F54°F39°F1.1"
      April34°F61°F46°F1.7"
      May42°F70°F55°F3.0"
      June51°F81°F65°F1.7"
      July59°F92°F75°F0.9"
      August56°F89°F72°F1.0"
      September48°F79°F62°F1.6"
      October38°F63°F49°F1.7"
      November27°F50°F37°F0.8"
      December16°F36°F25°F0.9"

      Custer 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.
      IndexCusterMontanaNational
      Air quality index213442
      Pollution index143,915834,4732,726,193

      Custer 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%
      Benzene0.003%
      Carbon Tetrachloride0.000%
      Lead0.000%
      Mercury0.000%

      Average monthly Custer temperature with heat index

      Custer monthly precipitation with daily maximum

      Custer monthly snow depth with daily maximum

      Custer monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Custer, MT1512158.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Kobuk, AK1513824.0%
      Cutter, AZ1516020.0%
      North San Juan, CA1514412.0%
      Winterhaven, CA1514510.0%
      Montezuma, CO151476.0%
      Custer, MT1512158.0%
      Source: The Custer, 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.