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| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 10°F | 29°F | 19°F | 1.4" |
| February | 12°F | 32°F | 22°F | 1.9" |
| March | 25°F | 47°F | 36°F | 2.3" |
| April | 36°F | 62°F | 49°F | 4.9" |
| May | 47°F | 72°F | 59°F | 4.5" |
| June | 58°F | 81°F | 69°F | 5.3" |
| July | 61°F | 84°F | 72°F | 6.9" |
| August | 59°F | 81°F | 70°F | 4.2" |
| September | 51°F | 76°F | 63°F | 3.2" |
| October | 40°F | 63°F | 51°F | 3.4" |
| November | 28°F | 49°F | 38°F | 2.2" |
| December | 15°F | 33°F | 24°F | 2.5" |
| Index | East Dubuque | Illinois | National |
| Air quality index | 29 | 41 | 42 |
| Pollution index | 673,716 | 3,148,694 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 304 |
| Days with moderate air quality | 60 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.003% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Asbury, IA | 5,931 | 29 | 42.0% |
| Dubuque, IA | 58,052 | 29 | 42.0% |
| Peosta, IA | 1,964 | 29 | 42.0% |
| Zwingle, IA | 70 | 29 | 42.0% |
| Sandy Hook, WI | 251 | 29 | 42.0% |
| East Dubuque, IL | 1,569 | 29 | 42.0% |
| City | Population | Air Quality Index | National Avg. |
| Fullerton, NE | 1,569 | 19 | 62.0% |
| Roxana, IL | 1,570 | 54 | 8.0% |
| Olive Hill, KY | 1,568 | 14 | 72.0% |
| St. Regis Park, KY | 1,568 | 49 | 2.0% |
| East Berlin, PA | 1,570 | 41 | 18.0% |
| East Dubuque, IL | 1,569 | 29 | 42.0% |
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