TODAY NOV25
TEMPERATURE14
HUMIDITY81
PRESSURE
WIND COND.
  • 298Tue30%20%
  • 235Wed30%80%
  • 18550%
  • 15-3Fri
  • 8-4Sat
daynightWeather update from ROCKY BOY at
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Weather Quick Facts

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

Compare St. Pierre, MT Weather

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      St. Pierre 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"

      St. Pierre 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.
      IndexSt. PierreMontanaNational
      Air quality index213442
      Pollution index232,374834,4732,726,193

      St. Pierre 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 St. Pierre temperature with heat index

      St. Pierre monthly precipitation with daily maximum

      St. Pierre monthly snow depth with daily maximum

      St. Pierre monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Rocky Boy West, MT8362158.0%
      Sangrey, MT4182158.0%
      Big Sandy, MT6372158.0%
      Azure, MT4312158.0%
      Parker School, MT6592158.0%
      St. Pierre, MT3572158.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Shonto, AZ3574510.0%
      Chacra, CO3574412.0%
      City of Creede, CO3574412.0%
      La Crosse, FL3573530.0%
      Millbrook, IL3570100.0%
      St. Pierre, MT3572158.0%
      Source: The St. Pierre, 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.