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" |
Index | Thornton | Colorado | National |
Air quality index | 58 | 38 | 50 |
Pollution index | 209,253 | 2,034,619 | 5,066,862 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 91 |
Days with moderate air quality | 252 |
Days w/ poor A.Q. for sensitive groups | 20 |
Days with unhealthy air quality | 2 |
Pollutant | Total |
Arsenic | 0.000% |
Benzene | 0.003% |
Carbon Tetrachloride | 0.000% |
Lead | 0.000% |
Mercury | 0.000% |
City, State | Population | Air Quality Index | National Avg. |
Eldorado Springs, CO | 935 | 47 | 6% |
Erie, CO | 20,801 | 47 | 6% |
Louisville, CO | 19,972 | 47 | 6% |
Superior, CO | 12,928 | 47 | 6% |
Gunbarrel, CO | 9,559 | 47 | 6% |
Thornton, CO | 130,511 | 58 | 16% |
City, State | Population | Air Quality Index | National Avg. |
New Haven, CT | 130,405 | 41 | 18% |
Waco, TX | 130,659 | 38 | 24% |
Charleston, SC | 129,888 | 38 | 24% |
Enterprise, NV | 129,620 | 54 | 8% |
Cedar Rapids, IA | 129,537 | 39 | 22% |
Thornton, CO | 130,511 | 58 | 16% |