Thornton, CO Weather Forecast & Monthly Average Temperatures

TEMPERATURE	30
HUMIDITY	80
PRESSURE	30.12
WIND COND.

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Thornton 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	21°F	45°F	31°F	1.8"
February	22°F	46°F	32°F	2.0"
March	30°F	58°F	42°F	2.1"
April	35°F	63°F	47°F	4.0"
May	44°F	70°F	55°F	5.2"
June	54°F	84°F	68°F	4.6"
July	60°F	89°F	73°F	5.7"
August	59°F	87°F	71°F	4.5"
September	51°F	79°F	63°F	5.7"
October	39°F	67°F	51°F	4.1"
November	29°F	56°F	41°F	2.2"
December	19°F	44°F	30°F	2.9"

Did you know?

The highest monthly average temperature in Thornton for July is 73 degrees.
The lowest monthly average temperature in Thornton for December is 30 degrees.
The most monthly precipitation in Thornton occurs in September with 5.7 inches.
The air quality index in Thornton is 8% worse than the national average.
The pollution index in Thornton is 95% better than the national average.

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Thornton 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	Thornton	Colorado	National
Air quality index	54	38	50
Pollution index	209,253	2,034,619	5,066,862

Thornton air quality information

Measurement	Total
Days measured	365
Days with good air quality	153
Days with moderate air quality	189
Days w/ poor A.Q. for sensitive groups	23
Days with unhealthy air quality

Thornton air quality information

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

Average monthly Thornton temperature with heat index

Thornton monthly precipitation with daily maximum

Thornton monthly snow depth with daily maximum

Thornton monthly wind speed information

Nearby cities with good air quality

City, State	Population	Air Quality Index	National Avg.
Erie, CO	20,801	42	16%
Paragon Estates, CO	892	42	16%
Boulder, CO	105,420	42	16%
Leyner, CO	27	42	16%
Dacono, CO	4,623	42	16%
Thornton, CO	130,511	54	8%

Cities with similar population

City, State	Population	Air Quality Index	National Avg.
New Haven, CT	130,405	49	2%
Waco, TX	130,659	39	22%
Charleston, SC	129,888	36	28%
Enterprise, NV	129,620	54	8%
Cedar Rapids, IA	129,537	42	16%
Thornton, CO	130,511	54	8%

Source: The Thornton, 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.