St. Marie, MT Weather - Forecast & Monthly Averages

TEMPERATURE	56
HUMIDITY	37
PRESSURE
WIND COND.	310 18.4

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Weather Quick Facts

The highest monthly average temperature in St. Marie for July is 72.8 degrees
The lowest monthly average temperature in St. Marie for December is 15.5 degrees
The most monthly precipitation in St. Marie occurs in May with 2.9 inches
The air quality index in St. Marie is 19% better than the national average
The pollution index in St. Marie is 87% better than the national average

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St. Marie 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	4°F	28°F	16°F	0.5"
February	8°F	31°F	18°F	0.4"
March	20°F	47°F	32°F	0.6"
April	30°F	61°F	44°F	1.1"
May	40°F	70°F	55°F	2.9"
June	50°F	79°F	64°F	2.8"
July	56°F	90°F	73°F	1.8"
August	54°F	88°F	70°F	1.4"
September	45°F	77°F	60°F	1.2"
October	32°F	61°F	45°F	1.1"
November	19°F	45°F	30°F	0.6"
December	5°F	27°F	15°F	0.7"

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St. Marie 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	St. Marie	Montana	National
Air quality index	34	34	42
Pollution index	348,172	834,473	2,726,193

St. Marie air quality

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

Air quality details

Pollutant	Total
Arsenic	0.000%
Benzene	0.005%
Carbon Tetrachloride	0.000%
Lead	0.010%
Mercury	0.000%

Average monthly St. Marie temperature with heat index

St. Marie monthly precipitation with daily maximum

St. Marie monthly snow depth with daily maximum

St. Marie monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Glasgow, MT	3,332	34	32.0%
St. Marie, MT	325	34	32.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Colt, AR	325	45	10.0%
Oak Shores, CA	325	46	8.0%
Eldorado Springs, CO	325	47	6.0%
Bronson, IA	325	35	30.0%
Oldtown, ID	325	43	14.0%
St. Marie, MT	325	34	32.0%

Source: The St. Marie, 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.