Helena Valley Northwest, MT Weather - Forecast & Monthly Averages

TEMPERATURE	48
HUMIDITY	40
PRESSURE
WIND COND.	263 11.3

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Weather Quick Facts

The highest monthly average temperature in Helena Valley Northwest for July is 72.7 degrees
The lowest monthly average temperature in Helena Valley Northwest for December is 21.8 degrees
The most monthly precipitation in Helena Valley Northwest occurs in June with 2 inches
The air quality index in Helena Valley Northwest is 5% better than the national average
The pollution index in Helena Valley Northwest is 58% better than the national average

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Helena Valley Northwest 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	13°F	35°F	24°F	0.6"
February	18°F	41°F	28°F	0.7"
March	25°F	52°F	38°F	0.5"
April	31°F	60°F	44°F	0.9"
May	39°F	69°F	53°F	1.8"
June	47°F	79°F	63°F	2.0"
July	55°F	91°F	73°F	0.7"
August	52°F	88°F	69°F	1.1"
September	44°F	77°F	59°F	1.1"
October	34°F	62°F	46°F	0.8"
November	23°F	47°F	34°F	0.8"
December	12°F	33°F	22°F	0.8"

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Helena Valley Northwest 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	Helena Valley Northwest	Montana	National
Air quality index	40	34	42
Pollution index	1,148,190	834,473	2,726,193

Helena Valley Northwest air quality

Measurement	Total
Days measured	365
Days with good air quality	288
Days with moderate air quality	75
Days w/ poor A.Q. for sensitive groups	2
Days with unhealthy air quality	0

Air quality details

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

Average monthly Helena Valley Northwest temperature with heat index

Helena Valley Northwest monthly precipitation with daily maximum

Helena Valley Northwest monthly snow depth with daily maximum

Helena Valley Northwest monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Helena Valley Northeast, MT	3,519	40	20.0%
Marysville, MT	71	40	20.0%
Montana City, MT	2,821	40	20.0%
Helena Valley Southeast, MT	8,546	40	20.0%
South Hills, MT	586	40	20.0%
Helena Valley Northwest, MT	4,256	40	20.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Highland CDP, IN	4,256	55	10.0%
Taylor, AZ	4,255	44	12.0%
Indian River Shores, FL	4,255	36	28.0%
Mount Pleasant, PA	4,255	36	28.0%
High Ridge, MO	4,257	54	8.0%
Helena Valley Northwest, MT	4,256	40	20.0%

Source: The Helena Valley Northwest, 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.