TODAY AUG05
TEMPERATURE86
HUMIDITY15
PRESSURE
WIND COND.185 6.4
  • 9157Wed20%
  • 9153Thu30%
  • 8250Fri
  • 8553Sat
  • 8350Sun
daynightWeather update from HELENA at

Key findings

  • The highest monthly average temperature in Helena Valley Northwest for July is 73 degrees
  • The lowest monthly average temperature in Helena Valley Northwest for December is 22 degrees
  • The most monthly precipitation in Helena Valley Northwest occurs in June with 2 inches
  • The air quality index in Helena Valley Northwest is 20% better than the national average
  • The pollution index in Helena Valley Northwest is 77% better than the national average

Compare Helena Valley Northwest, MT Weather

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      Helena Valley Northwest 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"

      Helena Valley Northwest 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.
      IndexHelena Valley NorthwestMontanaNational
      Air quality index403450
      Pollution index1,148,190685,9255,066,862

      Helena Valley Northwest air quality information

      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

      Helena Valley Northwest air quality information

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

      Average monthly Helena Valley Northwest temperature with heat index

      Helena Valley Northwest monthly precipitation with daily maximum

      Helena Valley Northwest monthly snow depth with daily maximum

      Helena Valley Northwest monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Helena, MT30,1024020%
      Helena West Side, MT1,2424020%
      Helena Valley Northeast, MT3,1544020%
      Marysville, MT924020%
      Helena Valley Southeast, MT7,5434020%
      Helena Valley Northwest, MT3,9674020%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Gamewell, NC3,9674314%
      Iroquois Point, HI3,9673040%
      Metzger, OR3,9673824%
      Hallsville, TX3,9663726%
      Larned, KS3,9661570%
      Helena Valley Northwest, MT3,9674020%
      Source: The Helena Valley Northwest, 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.