Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 14°F | 44°F | 27°F | 0.1" |
February | 16°F | 46°F | 30°F | 0.1" |
March | 24°F | 56°F | 39°F | 0.2" |
April | 31°F | 61°F | 45°F | 1.0" |
May | 41°F | 71°F | 55°F | 1.3" |
June | 51°F | 83°F | 65°F | 1.1" |
July | 55°F | 82°F | 67°F | 2.6" |
August | 54°F | 82°F | 67°F | 2.6" |
September | 47°F | 76°F | 60°F | 0.9" |
October | 34°F | 63°F | 46°F | 0.5" |
November | 23°F | 54°F | 38°F | 0.1" |
December | 15°F | 42°F | 27°F | 0.1" |
Index | Calhan | Colorado | National |
Air quality index | 45 | 38 | 42 |
Pollution index | 563,976 | 2,068,342 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 259 |
Days with moderate air quality | 106 |
Days w/ poor A.Q. for sensitive groups | 0 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.001% |
Benzene | 0.020% |
Carbon Tetrachloride | 0.001% |
Lead | 0.030% |
Mercury | 0.010% |
City | Population | Air Quality Index | National Avg. |
Ramah, CO | 164 | 45 | 10.0% |
Peyton, CO | 0 | 45 | 10.0% |
Simla, CO | 504 | 45 | 10.0% |
Elbert, CO | 220 | 45 | 10.0% |
Ellicott, CO | 1,012 | 45 | 10.0% |
Calhan, CO | 463 | 45 | 10.0% |
City | Population | Air Quality Index | National Avg. |
Bellefonte, AR | 463 | 36 | 28.0% |
Yampa, CO | 463 | 47 | 6.0% |
Lostant, IL | 463 | 0 | 100.0% |
Alta Vista, KS | 463 | 32 | 36.0% |
Oden, MI | 463 | 36 | 28.0% |
Calhan, CO | 463 | 45 | 10.0% |