Shelby, MT Weather - Forecast & Monthly Averages

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PRESSURE
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Weather Quick Facts

The highest monthly average temperature in Shelby for July is 67.2 degrees
The lowest monthly average temperature in Shelby for December is 20.5 degrees
The most monthly precipitation in Shelby occurs in June with 2.7 inches
The air quality index in Shelby is 50% better than the national average
The pollution index in Shelby is 90% better than the national average

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Shelby 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	14°F	35°F	24°F	0.1"
February	15°F	37°F	25°F	0.1"
March	23°F	46°F	33°F	0.2"
April	29°F	54°F	41°F	0.4"
May	38°F	64°F	50°F	1.8"
June	45°F	72°F	58°F	2.7"
July	51°F	84°F	67°F	1.0"
August	48°F	81°F	64°F	0.6"
September	41°F	72°F	55°F	1.8"
October	32°F	55°F	42°F	0.5"
November	25°F	45°F	34°F	0.1"
December	11°F	31°F	21°F	0.1"

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Shelby 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	Shelby	Montana	National
Air quality index	21	34	42
Pollution index	284,954	834,473	2,726,193

Shelby air quality

Measurement	Total
Days measured	363
Days with good air quality	350
Days with moderate air quality	12
Days w/ poor A.Q. for sensitive groups	1
Days with unhealthy air quality	0

Air quality details

Pollutant	Total
Arsenic	0.000%
Benzene	0.004%
Carbon Tetrachloride	0.000%
Lead	0.003%
Mercury	0.000%

Average monthly Shelby temperature with heat index

Shelby monthly precipitation with daily maximum

Shelby monthly snow depth with daily maximum

Shelby monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Shelby, MT	2,875	21	58.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Homer, LA	2,875	35	30.0%
Harrisburg, AR	2,874	45	10.0%
Syracuse, IN	2,874	37	26.0%
Brandenburg, KY	2,874	39	22.0%
Saint-Isidore, QC	2,874	n/a
Shelby, MT	2,875	21	58.0%

Source: The Shelby, 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.