TODAY NOV24
TEMPERATURE37
HUMIDITY53
PRESSURE
WIND COND.158 1.6
  • 3117Sun40%
  • 3921Mon
  • 4020Tue20%
  • 3617Wed
  • 3315
daynightWeather update from Boulder Hill I-15 MP 170.9 at
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Weather Quick Facts

  • The highest monthly average temperature in Jefferson City for July is 72.7 degrees
  • The lowest monthly average temperature in Jefferson City for December is 21.8 degrees
  • The most monthly precipitation in Jefferson City occurs in June with 2 inches
  • The air quality index in Jefferson City is 5% better than the national average
  • The pollution index in Jefferson City is 58% better than the national average

Compare Jefferson City, MT Weather

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      Jefferson City 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
      January13°F35°F24°F0.6"
      February18°F41°F28°F0.7"
      March25°F52°F38°F0.5"
      April31°F60°F44°F0.9"
      May39°F69°F53°F1.8"
      June47°F79°F63°F2.0"
      July55°F91°F73°F0.7"
      August52°F88°F69°F1.1"
      September44°F77°F59°F1.1"
      October34°F62°F46°F0.8"
      November23°F47°F34°F0.8"
      December12°F33°F22°F0.8"

      Jefferson City 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.
      IndexJefferson CityMontanaNational
      Air quality index403442
      Pollution index1,148,190834,4732,726,193

      Jefferson City air quality

      MeasurementTotal
      Days measured365
      Days with good air quality288
      Days with moderate air quality75
      Days w/ poor A.Q. for sensitive groups2
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.000%
      Benzene0.020%
      Carbon Tetrachloride0.002%
      Lead0.010%
      Mercury0.000%

      Average monthly Jefferson City temperature with heat index

      Jefferson City monthly precipitation with daily maximum

      Jefferson City monthly snow depth with daily maximum

      Jefferson City monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Basin, MT2674020.0%
      Helena, MT32,6554020.0%
      Clancy, MT1,9644020.0%
      Boulder, MT1,0274020.0%
      South Hills, MT5864020.0%
      Jefferson City, MT5964020.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Thornton, AR5963530.0%
      Woodson, AR5964510.0%
      Allensworth, CA5966632.0%
      Dudley, GA5963824.0%
      Radcliffe, IA5963726.0%
      Jefferson City, MT5964020.0%
      Source: The Jefferson City, 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.