TODAY NOV21
TEMPERATURE20
HUMIDITY81
PRESSURE102130
WIND COND.70 11.2
  • 3823Fri20%
  • 4015Sat20%60%
  • 246Sun40%
  • 2710Mon
  • 3214Tue
daynightWeather update from Miles City, Frank Wiley Field Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Forsyth for July is 76.5 degrees
  • The lowest monthly average temperature in Forsyth for December is 20.2 degrees
  • The most monthly precipitation in Forsyth occurs in May with 3.5 inches
  • The air quality index in Forsyth is 50% better than the national average
  • The pollution index in Forsyth is 79% better than the national average

Compare Forsyth, MT Weather

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      Forsyth 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
      January11°F33°F20°F0.2"
      February14°F37°F24°F0.2"
      March25°F52°F36°F0.6"
      April34°F62°F46°F1.6"
      May43°F70°F56°F3.5"
      June53°F82°F67°F2.6"
      July61°F93°F76°F1.1"
      August58°F90°F73°F1.1"
      September48°F79°F62°F1.0"
      October36°F62°F47°F1.0"
      November23°F48°F34°F0.3"
      December11°F32°F20°F0.2"

      Forsyth 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.
      IndexForsythMontanaNational
      Air quality index213442
      Pollution index562,118834,4732,726,193

      Forsyth 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%
      Benzene0.010%
      Carbon Tetrachloride0.001%
      Lead0.002%
      Mercury0.000%

      Average monthly Forsyth temperature with heat index

      Forsyth monthly precipitation with daily maximum

      Forsyth monthly snow depth with daily maximum

      Forsyth monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Rosebud, MT363922.0%
      Forsyth, MT1,5962158.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Wyoming, DE1,5964216.0%
      Sarcoxie, MO1,5963726.0%
      Penn State Erie (Behrend), PA1,5963628.0%
      Minitonas-Bowsman, MB1,596n/a 
      Georgiana, AL1,597524.0%
      Forsyth, MT1,5962158.0%
      Source: The Forsyth, 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.