| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 24°F | 45°F | 33°F | 4.5" |
| February | 26°F | 47°F | 35°F | 4.8" |
| March | 38°F | 60°F | 47°F | 6.6" |
| April | 47°F | 70°F | 57°F | 9.3" |
| May | 55°F | 77°F | 65°F | 8.8" |
| June | 65°F | 86°F | 74°F | 9.9" |
| July | 68°F | 89°F | 78°F | 9.6" |
| August | 66°F | 88°F | 76°F | 10.9" |
| September | 58°F | 80°F | 68°F | 8.0" |
| October | 47°F | 69°F | 57°F | 7.5" |
| November | 38°F | 59°F | 47°F | 6.5" |
| December | 28°F | 46°F | 36°F | 3.6" |
| Index | Urbana | Missouri | National |
| Air quality index | 39 | 97 | 42 |
| Pollution index | 559,454 | 1,630,255 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 322 |
| Days with moderate air quality | 43 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Hermitage, MO | 778 | 39 | 22.0% |
| Cross Timbers, MO | 496 | 39 | 22.0% |
| Macks Creek, MO | 353 | 39 | 22.0% |
| Louisburg, MO | 53 | 39 | 22.0% |
| Preston, MO | 338 | 39 | 22.0% |
| Urbana, MO | 442 | 39 | 22.0% |
| City | Population | Air Quality Index | National Avg. |
| Dewey Beach, DE | 442 | 36 | 28.0% |
| Boody, IL | 442 | 44 | 12.0% |
| Equality, IL | 442 | 45 | 10.0% |
| Naplate, IL | 442 | 0 | 100.0% |
| Ruma, IL | 442 | 54 | 8.0% |
| Urbana, MO | 442 | 39 | 22.0% |
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