| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 18°F | 34°F | 25°F | 3.2" |
| February | 19°F | 36°F | 27°F | 3.2" |
| March | 32°F | 51°F | 41°F | 5.1" |
| April | 42°F | 64°F | 52°F | 6.5" |
| May | 53°F | 74°F | 63°F | 7.0" |
| June | 62°F | 82°F | 72°F | 7.0" |
| July | 65°F | 85°F | 74°F | 7.2" |
| August | 64°F | 84°F | 73°F | 8.3" |
| September | 57°F | 78°F | 66°F | 7.1" |
| October | 45°F | 65°F | 54°F | 6.0" |
| November | 34°F | 52°F | 42°F | 4.6" |
| December | 23°F | 38°F | 30°F | 3.8" |
| Index | Kewanee | Illinois | National |
| Air quality index | 41 | 41 | 42 |
| Pollution index | 339,156 | 3,148,694 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 285 |
| Days with moderate air quality | 78 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Buda, IL | 606 | 41 | 18.0% |
| Sheffield, IL | 828 | 41 | 18.0% |
| Bradford, IL | 673 | 41 | 18.0% |
| Toulon, IL | 1,291 | 41 | 18.0% |
| Galva, IL | 2,539 | 41 | 18.0% |
| Kewanee, IL | 12,622 | 41 | 18.0% |
| City | Population | Air Quality Index | National Avg. |
| Fernandina Beach, FL | 12,622 | 43 | 14.0% |
| Big Bear City, CA | 12,621 | 89 | 78.0% |
| San Anselmo, CA | 12,623 | 40 | 20.0% |
| Woodland Park, NJ | 12,608 | 51 | 2.0% |
| Erin, ON | 12,607 | n/a | |
| Kewanee, IL | 12,622 | 41 | 18.0% |
Here are the best places to live in Illinois
See the best places to live in Kewanee
Most Dangerous States In The US
These are the 10 cheapest cities in Illinois