Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 18°F | 48°F | 32°F | 1.2" |
February | 21°F | 50°F | 34°F | 1.5" |
March | 30°F | 62°F | 44°F | 1.6" |
April | 36°F | 66°F | 49°F | 0.2" |
May | 43°F | 73°F | 57°F | 2.4" |
June | 54°F | 89°F | 71°F | 1.1" |
July | 59°F | 92°F | 75°F | 2.1" |
August | 56°F | 90°F | 72°F | 1.1" |
September | 49°F | 82°F | 64°F | 0.2" |
October | 38°F | 69°F | 52°F | 2.1" |
November | 28°F | 58°F | 41°F | 2.6" |
December | 17°F | 46°F | 30°F | 0.7" |
Index | Black Hawk | Colorado | National |
Air quality index | 47 | 38 | 42 |
Pollution index | 643,172 | 2,068,342 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 227 |
Days with moderate air quality | 133 |
Days w/ poor A.Q. for sensitive groups | 5 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.001% |
Benzene | 0.030% |
Carbon Tetrachloride | 0.000% |
Lead | 0.003% |
Mercury | 0.001% |
City | Population | Air Quality Index | National Avg. |
Coal Creek town, CO | 308 | 47 | 6.0% |
Empire, CO | 410 | 47 | 6.0% |
St. Mary's, CO | 416 | 47 | 6.0% |
Nederland, CO | 1,465 | 47 | 6.0% |
St. Ann Highlands, CO | 486 | 47 | 6.0% |
Black Hawk, CO | 98 | 47 | 6.0% |
City | Population | Air Quality Index | National Avg. |
Nelson Lagoon, AK | 98 | 31 | 38.0% |
Northway Village, AK | 98 | 38 | 24.0% |
Cusseta, AL | 98 | 42 | 16.0% |
Peach Orchard, AR | 98 | 26 | 48.0% |
Cowlic, AZ | 98 | 31 | 38.0% |
Black Hawk, CO | 98 | 47 | 6.0% |