Darby, MT Weather - Forecast & Monthly Averages

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Weather Quick Facts

The highest monthly average temperature in Darby for July is 68.2 degrees
The lowest monthly average temperature in Darby for December is 21.3 degrees
The most monthly precipitation in Darby occurs in September with 6.3 inches
The air quality index in Darby is 5% better than the national average
The pollution index in Darby is 69% better than the national average

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Darby 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	19°F	31°F	25°F	1.6"
February	21°F	35°F	27°F	1.3"
March	26°F	46°F	36°F	2.5"
April	30°F	55°F	43°F	2.4"
May	37°F	64°F	51°F	4.2"
June	45°F	71°F	59°F	3.0"
July	50°F	85°F	68°F	4.1"
August	46°F	82°F	65°F	4.6"
September	40°F	73°F	57°F	6.3"
October	33°F	55°F	44°F	3.0"
November	24°F	39°F	31°F	2.0"
December	15°F	28°F	21°F	1.8"

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Darby 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	Darby	Montana	National
Air quality index	40	34	42
Pollution index	848,303	834,473	2,726,193

Darby air quality information

Measurement	Total
Days measured	365
Days with good air quality	224
Days with moderate air quality	137
Days w/ poor A.Q. for sensitive groups	3
Days with unhealthy air quality	1

Darby air quality information

Pollutant	Total
Arsenic	0.000%
Benzene	0.020%
Carbon Tetrachloride	0.002%
Lead	0.010%
Mercury	0.000%

Average monthly Darby temperature with heat index

Darby monthly precipitation with daily maximum

Darby monthly snow depth with daily maximum

Darby monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Sula, MT	77	20	60.0%
Conner, MT	95	40	20.0%
Charlos Heights, MT	0	40	20.0%
Darby, MT	685	40	20.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Green Mountain Falls, CO	685	45	10.0%
Cordova, IL	685	42	16.0%
Maple Rapids, MI	685	36	28.0%
Sycamore Hills, MO	685	54	8.0%
Mott, ND	685	33	34.0%
Darby, MT	685	40	20.0%

Source: The Darby, 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.