Westby, MT Weather - Forecast & Monthly Averages

TEMPERATURE	20
HUMIDITY	84
PRESSURE
WIND COND.	329 38.6

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Weather Quick Facts

The highest monthly average temperature in Westby for July is 72.1 degrees
The lowest monthly average temperature in Westby for January is 14.2 degrees
The most monthly precipitation in Westby occurs in May with 2.7 inches
The air quality index in Westby is 19% better than the national average
The pollution index in Westby is 79% better than the national average

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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.
Month	Temp. _(min)	Temp. _(max)	Temp. _(avg)	Precipitation
January	3°F	27°F	14°F	0.5"
February	5°F	29°F	16°F	0.6"
March	17°F	45°F	30°F	0.7"
April	29°F	60°F	43°F	1.1"
May	39°F	70°F	54°F	2.7"
June	49°F	80°F	64°F	2.6"
July	56°F	89°F	72°F	2.1"
August	53°F	87°F	69°F	1.5"
September	43°F	77°F	59°F	1.6"
October	31°F	60°F	44°F	1.2"
November	18°F	43°F	29°F	0.7"
December	4°F	27°F	15°F	0.8"

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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.
Index	Westby	Montana	National
Air quality index	34	34	42
Pollution index	563,599	834,473	2,726,193

Westby air quality information

Measurement	Total
Days measured	365
Days with good air quality	309
Days with moderate air quality	53
Days w/ poor A.Q. for sensitive groups	3
Days with unhealthy air quality	0

Westby air quality information

Pollutant	Total
Arsenic	0.000%
Benzene	0.010%
Carbon Tetrachloride	0.001%
Lead	0.010%
Mercury	0.000%

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	Population	Air Quality Index	National Avg.
Fortuna, ND	34	34	32.0%
Westby, MT	163	34	32.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Oil Trough, AR	163	45	10.0%
Antares, AZ	163	13	74.0%
Sedgwick, CO	163	19	62.0%
Maunie, IL	163	45	10.0%
Lincolnville, KS	163	22	56.0%
Westby, MT	163	34	32.0%

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.