Johnstown, CO Weather - Forecast & Monthly Averages

TEMPERATURE	48
HUMIDITY	93
PRESSURE	100780
WIND COND.	230 20.5

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Weather Quick Facts

The highest monthly average temperature in Johnstown for July is 72 degrees
The lowest monthly average temperature in Johnstown for December is 27.2 degrees
The most monthly precipitation in Johnstown occurs in May with 4.4 inches
The air quality index in Johnstown is 7% worse than the national average
The pollution index in Johnstown is 248% worse than the national average

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Johnstown 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	18°F	43°F	29°F	2.6"
February	20°F	47°F	32°F	0.5"
March	28°F	59°F	42°F	1.4"
April	34°F	64°F	47°F	3.7"
May	43°F	71°F	55°F	4.4"
June	52°F	85°F	68°F	2.1"
July	57°F	90°F	72°F	2.6"
August	56°F	87°F	71°F	2.6"
September	50°F	81°F	64°F	1.8"
October	38°F	66°F	50°F	2.2"
November	27°F	55°F	39°F	1.2"
December	16°F	42°F	27°F	0.4"

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Johnstown 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	Johnstown	Colorado	National
Air quality index	45	38	42
Pollution index	9,490,160	2,068,342	2,726,193

Johnstown air quality information

Measurement	Total
Days measured	365
Days with good air quality	252
Days with moderate air quality	110
Days w/ poor A.Q. for sensitive groups	3
Days with unhealthy air quality	0

Johnstown air quality information

Pollutant	Total
Arsenic	0.004%
Benzene	0.140%
Carbon Tetrachloride	0.020%
Lead	0.020%
Mercury	0.001%

Average monthly Johnstown temperature with heat index

Johnstown monthly precipitation with daily maximum

Johnstown monthly snow depth with daily maximum

Johnstown monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Gilcrest, CO	1,381	45	10.0%
Evans, CO	22,128	45	10.0%
Windsor, CO	23,679	45	10.0%
Mead, CO	4,978	45	10.0%
Garden City, CO	208	45	10.0%
Johnstown, CO	14,357	45	10.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Fort Campbell North, KY	14,363	40	20.0%
Ozark, AL	14,350	35	30.0%
Southern Pines, NC	14,347	29	42.0%
Saint-Charles-Borromée, QC	14,372	n/a
Lavaltrie, QC	14,339	n/a
Johnstown, CO	14,357	45	10.0%

Source: The Johnstown, CO 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.