TODAY JUL16
TEMPERATURE71
HUMIDITY31
PRESSURE
WIND COND.240 8.1
  • 8758Mon
  • 8857Tue20%
  • 9055Wed
  • 8956Thu
  • 9156Fri
daynightWeather update from Helena Regional Airport at

Southeast Average Weather

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
January-25°F55°F25°F0.3"
February-15°F65°F30°F0.8"
March-11°F74°F36°F0.5"
April6°F81°F44°F1.2"
May25°F91°F55°F2.1"
June33°F99°F62°F2.4"
July43°F102°F74°F0.6"
August41°F100°F69°F0.6"
September31°F97°F59°F1.1"
October5°F84°F45°F1.0"
November-11°F72°F36°F0.5"
December-23°F60°F21°F0.4"

Did you know?

  • The highest monthly average temperature in Southeast for July is 74 degrees.
  • The lowest monthly average temperature in Southeast for December is 21 degrees.
  • The most monthly precipitation in Southeast occurs in June with 2.4 inches.
  • The air quality index in Southeast is 29% better than the national average.
  • The pollution index in Southeast is 77% better than the national average.

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Compare Helena, MT Weather To Other Cities

Southeast 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.
IndexSoutheastHelenaMontana
Air quality index353534
Pollution index1,148,1901,148,190685,925

Southeast 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

Southeast air quality information

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

Average monthly Southeast temperature with heat index

Southeast monthly precipitation with daily maximum

Southeast monthly snow depth with daily maximum

Southeast monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Clancy, MT1,6123530%
Helena Valley Southeast, MT7,5433530%
Marysville, MT923530%
East Helena, MT2,2863530%
Helena Valley West Central, MT8,7533530%
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 Southeast, 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.