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Grass Range 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-26°F65°F25°F0.3"
February-30°F63°F26°F0.4"
March-11°F72°F33°F0.8"
April0°F79°F40°F1.7"
May16°F86°F50°F3.3"
June28°F91°F58°F3.6"
July36°F99°F69°F1.3"
August37°F99°F65°F1.1"
September27°F94°F56°F1.5"
October1°F83°F43°F1.6"
November-17°F73°F35°F0.7"
December-30°F59°F21°F0.4"

Did you know?

  • The highest monthly average temperature in Grass Range for July is 69 degrees.
  • The lowest monthly average temperature in Grass Range for December is 21 degrees.
  • The most monthly precipitation in Grass Range occurs in June with 3.6 inches.
  • The air quality index in Grass Range is 51% better than the national average.
  • The pollution index in Grass Range is 95% better than the national average.

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Grass Range 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.
IndexGrass RangeMontanaNational
Air quality index243450
Pollution index231,483685,9255,066,862

Grass Range air quality information

MeasurementTotal
Days measured365
Days with good air quality340
Days with moderate air quality24
Days w/ poor A.Q. for sensitive groups1
Days with unhealthy air quality

Grass Range air quality information

PollutantTotal
Arsenic0.000%
Benzene0.001%
Carbon Tetrachloride0.000%
Lead0.000%
Mercury0.000%

Average monthly Grass Range temperature with heat index

Grass Range monthly precipitation with daily maximum

Grass Range monthly snow depth with daily maximum

Grass Range monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Grass Range, MT1192452%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Northwest Stanwood, WA1193138%
New Bavaria, OH1193040%
Kennan, WI1193628%
Clearmont, WY1193628%
Carlos, MD1193236%
Grass Range, MT1192452%
Source: The Grass Range, 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.