TODAY DEC10
TEMPERATURE13
HUMIDITY86
PRESSURE
WIND COND.181 6
  • 3118Mon
  • 3121Tue
  • 3721Wed20%20%
  • 3321Thu
  • 3723Fri
daynightWeather update from CROSBY at

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Westby 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
January3°F27°F14°F0.5"
February5°F29°F16°F0.6"
March17°F45°F30°F0.7"
April29°F60°F43°F1.1"
May39°F70°F54°F2.7"
June49°F80°F64°F2.6"
July56°F89°F72°F2.1"
August53°F87°F69°F1.5"
September43°F77°F59°F1.6"
October31°F60°F44°F1.2"
November18°F43°F29°F0.7"
December4°F27°F15°F0.8"

Did you know?

  • The highest monthly average temperature in Westby for July is 72 degrees.
  • The lowest monthly average temperature in Westby for January is 14 degrees.
  • The most monthly precipitation in Westby occurs in May with 2.7 inches.
  • The air quality index in Westby is 17% better than the national average.
  • The pollution index in Westby is 88% better than the national average.

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Compare Westby, MT Weather To Other Cities

Westby 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.
IndexWestbyMontanaNational
Air quality index413450
Pollution index563,599685,9255,066,862

Westby air quality information

MeasurementTotal
Days measured365
Days with good air quality248
Days with moderate air quality97
Days w/ poor A.Q. for sensitive groups12
Days with unhealthy air quality8

Westby air quality information

PollutantTotal
Arsenic0.000%
Benzene0.010%
Carbon Tetrachloride0.001%
Lead0.010%
Mercury0.000%

Average monthly Westby temperature with heat index

Westby monthly precipitation with daily maximum

Westby monthly snow depth with daily maximum

Westby monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Fortuna, ND844118%
Westby, MT1634118%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Woolstock, IA1633726%
Kysorville, NY1633628%
Sweetwater, OK1634216%
Jette, MT1633824%
Verlot, WA1633138%
Westby, MT1634118%
Source: The Westby, 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.