TODAY NOV21
TEMPERATURE35
HUMIDITY88
PRESSURE
WIND COND.247 0.6
  • 4122Fri30%40%
  • 3515Sat90%80%
  • 283Sun40%30%
  • 289Mon30%50%
  • 319Tue
daynightWeather update from OLD FAITHFUL at
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Weather Quick Facts

  • The highest monthly average temperature in West Yellowstone for July is 56.3 degrees
  • The lowest monthly average temperature in West Yellowstone for January is 11.6 degrees
  • The most monthly precipitation in West Yellowstone occurs in January with 3.4 inches
  • The air quality index in West Yellowstone is 41% better than the national average
  • The pollution index in West Yellowstone is 34% worse than the national average

Compare West Yellowstone, MT Weather

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      West Yellowstone 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
      January1°F24°F12°F3.4"
      February3°F28°F15°F2.3"
      March9°F36°F22°F2.3"
      April17°F43°F29°F2.5"
      May26°F52°F38°F2.5"
      June33°F64°F48°F2.2"
      July39°F74°F56°F1.5"
      August37°F72°F54°F1.4"
      September31°F63°F45°F1.7"
      October24°F48°F34°F2.2"
      November13°F34°F23°F2.3"
      December3°F23°F13°F3.1"

      West Yellowstone 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.
      IndexWest YellowstoneMontanaNational
      Air quality index253442
      Pollution index3,657,990834,4732,726,193

      West Yellowstone air quality

      MeasurementTotal
      Days measured365
      Days with good air quality337
      Days with moderate air quality28
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.040%
      Benzene0.040%
      Carbon Tetrachloride0.010%
      Lead0.040%
      Mercury0.030%

      Average monthly West Yellowstone temperature with heat index

      West Yellowstone monthly precipitation with daily maximum

      West Yellowstone monthly snow depth with daily maximum

      West Yellowstone monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Hebgen Lake Estates, MT662550.0%
      West Yellowstone, MT1,0902550.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Ray City, GA1,0903530.0%
      Rochelle, GA1,0903922.0%
      Buffalo, IA1,090468.0%
      Minier, IL1,0904412.0%
      Horine, MO1,090548.0%
      West Yellowstone, MT1,0902550.0%
      Source: The West Yellowstone, 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.