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| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 15°F | 34°F | 24°F | 1.5" |
| February | 16°F | 37°F | 26°F | 1.9" |
| March | 29°F | 53°F | 40°F | 2.8" |
| April | 39°F | 66°F | 52°F | 3.9" |
| May | 49°F | 76°F | 63°F | 4.3" |
| June | 60°F | 85°F | 73°F | 6.0" |
| July | 64°F | 88°F | 76°F | 5.3" |
| August | 62°F | 86°F | 73°F | 4.9" |
| September | 54°F | 81°F | 66°F | 3.4" |
| October | 42°F | 68°F | 54°F | 3.2" |
| November | 31°F | 54°F | 42°F | 2.1" |
| December | 19°F | 37°F | 28°F | 2.6" |
| Index | Buffalo | Iowa | National |
| Air quality index | 46 | 39 | 42 |
| Pollution index | 4,003,130 | 1,154,535 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 217 |
| Days with moderate air quality | 145 |
| Days w/ poor A.Q. for sensitive groups | 3 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.170% |
| Benzene | 0.050% |
| Carbon Tetrachloride | 0.110% |
| Lead | 0.020% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Durant, IA | 1,878 | 32 | 36.0% |
| East Moline, IL | 20,683 | 46 | 8.0% |
| Reynolds, IL | 680 | 46 | 8.0% |
| Oak Grove, IL | 427 | 46 | 8.0% |
| Stockton, IA | 160 | 46 | 8.0% |
| Buffalo, IA | 1,090 | 46 | 8.0% |
| City | Population | Air Quality Index | National Avg. |
| Ray City, GA | 1,090 | 35 | 30.0% |
| Rochelle, GA | 1,090 | 39 | 22.0% |
| Minier, IL | 1,090 | 44 | 12.0% |
| Horine, MO | 1,090 | 54 | 8.0% |
| Hillsboro, MS | 1,090 | 44 | 12.0% |
| Buffalo, IA | 1,090 | 46 | 8.0% |
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