| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 25°F | 39°F | 31°F | 6.1" |
| February | 23°F | 37°F | 29°F | 2.4" |
| March | 37°F | 55°F | 45°F | 4.1" |
| April | 44°F | 65°F | 53°F | 3.9" |
| May | 55°F | 77°F | 65°F | 2.6" |
| June | 64°F | 85°F | 75°F | 4.7" |
| July | 65°F | 86°F | 75°F | 8.2" |
| August | 68°F | 88°F | 77°F | 7.2" |
| September | 59°F | 83°F | 71°F | 8.1" |
| October | 49°F | 69°F | 58°F | 8.2" |
| November | 36°F | 54°F | 44°F | 3.6" |
| December | 25°F | 38°F | 31°F | 2.6" |
| Index | Allenville | Illinois | National |
| Air quality index | 44 | 41 | 42 |
| Pollution index | 703,218 | 3,148,694 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 255 |
| Days with moderate air quality | 110 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Windsor village, IL | 965 | 40 | 20.0% |
| Windsor, IL | 1,150 | 40 | 20.0% |
| Lerna, IL | 251 | 40 | 20.0% |
| Mattoon, IL | 17,273 | 40 | 20.0% |
| Strasburg, IL | 528 | 40 | 20.0% |
| Allenville, IL | 133 | 44 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| Aleknagik, AK | 133 | 31 | 38.0% |
| Dutch Flat, CA | 133 | 44 | 12.0% |
| Volta, CA | 133 | 48 | 4.0% |
| Bradgate, IA | 133 | 15 | 70.0% |
| Floris, IA | 133 | 29 | 42.0% |
| Allenville, IL | 133 | 44 | 12.0% |
Here are the best places to live in Illinois
Most Dangerous States In The US
These are the 10 cheapest cities in Illinois
See the best places to live in Allenville