Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 13°F | 29°F | 21°F | 1.4" |
February | 14°F | 32°F | 22°F | 1.1" |
March | 28°F | 47°F | 37°F | 2.8" |
April | 39°F | 61°F | 49°F | 4.6" |
May | 50°F | 72°F | 60°F | 5.1" |
June | 60°F | 80°F | 69°F | 8.0" |
July | 63°F | 84°F | 73°F | 5.2" |
August | 61°F | 82°F | 71°F | 5.1" |
September | 54°F | 76°F | 63°F | 4.2" |
October | 43°F | 63°F | 52°F | 4.1" |
November | 31°F | 49°F | 39°F | 3.2" |
December | 18°F | 33°F | 26°F | 3.2" |
Index | Harpers Ferry | Iowa | National |
Air quality index | 35 | 39 | 42 |
Pollution index | 1,904,120 | 1,154,535 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 310 |
Days with moderate air quality | 55 |
Days w/ poor A.Q. for sensitive groups | 0 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.040% |
Benzene | 0.020% |
Carbon Tetrachloride | 0.001% |
Lead | 0.010% |
Mercury | 0.050% |
City | Population | Air Quality Index | National Avg. |
Monona, IA | 1,639 | 29 | 42.0% |
Wauzeka, WI | 671 | 29 | 42.0% |
Prairie du Chien, WI | 5,605 | 29 | 42.0% |
McGregor, IA | 837 | 29 | 42.0% |
Marquette, IA | 448 | 29 | 42.0% |
Harpers Ferry, IA | 248 | 35 | 30.0% |
City | Population | Air Quality Index | National Avg. |
Trinity Village, CA | 248 | 27 | 46.0% |
Vernon, CA | 248 | 72 | 44.0% |
Bartow, GA | 248 | 47 | 6.0% |
Girard, GA | 248 | 47 | 6.0% |
Westside, IA | 248 | 35 | 30.0% |
Harpers Ferry, IA | 248 | 35 | 30.0% |