TODAY NOV15
TEMPERATURE36
HUMIDITY70
PRESSURE
WIND COND.230 5.8
  • 5434Fri20%
  • 4732Sat
  • 5439Sun30%
  • 5433Mon
  • 4927Tue
daynightWeather update from Helena Regional Airport at
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Helena 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"

Did you know?

  • The highest monthly average temperature in Helena for July is 73 degrees.
  • The lowest monthly average temperature in Helena for December is 22 degrees.
  • The most monthly precipitation in Helena occurs in June with 2 inches.
  • The air quality index in Helena is 30% better than the national average.
  • The pollution index in Helena is 77% better than the national average.

Compare Helena, MT Weather To Other Cities

Helena 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.
IndexHelenaMontanaNational
Air quality index353450
Pollution index1,148,190685,9255,066,862

Helena air quality information

MeasurementTotal
Days measured365
Days with good air quality315
Days with moderate air quality50
Days w/ poor A.Q. for sensitive groups
Days with unhealthy air quality

Helena air quality information

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

Average monthly Helena temperature with heat index

Helena monthly precipitation with daily maximum

Helena monthly snow depth with daily maximum

Helena monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Helena Valley Northwest, MT3,9673530%
Jefferson City, MT6863530%
Spokane Creek, MT3173530%
Clancy, MT1,6123530%
Helena Valley Southeast, MT7,5433530%
Helena, MT30,1023530%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Myrtle Beach, SC30,1061570%
Orcutt, CA30,1095612%
Burlingame, CA30,118484%
Holly Springs, NC30,1264314%
Lawrenceville, GA30,1274216%
Helena, MT30,1023530%
Source: The Helena, 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.
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