| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 27°F | 47°F | 36°F | 4.0" |
| February | 28°F | 49°F | 38°F | 3.2" |
| March | 37°F | 60°F | 48°F | 4.5" |
| April | 46°F | 72°F | 58°F | 5.5" |
| May | 53°F | 77°F | 65°F | 4.8" |
| June | 62°F | 85°F | 73°F | 4.2" |
| July | 66°F | 86°F | 75°F | 5.9" |
| August | 65°F | 87°F | 75°F | 4.6" |
| September | 58°F | 81°F | 68°F | 3.5" |
| October | 46°F | 70°F | 57°F | 3.6" |
| November | 35°F | 60°F | 47°F | 3.4" |
| December | 31°F | 50°F | 40°F | 5.0" |
| Index | London | Kentucky | National |
| Air quality index | 40 | 45 | 42 |
| Pollution index | 5,798,370 | 1,369,131 | 2,726,193 |
| Measurement | Total |
| Days measured | 282 |
| Days with good air quality | 267 |
| Days with moderate air quality | 15 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.070% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.004% |
| Lead | 0.030% |
| Mercury | 0.070% |
| City | Population | Air Quality Index | National Avg. |
| Annville, KY | 831 | 33 | 34.0% |
| East Bernstadt, KY | 858 | 40 | 20.0% |
| Livingston, KY | 149 | 40 | 20.0% |
| Corbin, KY | 7,558 | 40 | 20.0% |
| North Corbin, KY | 1,842 | 40 | 20.0% |
| London, KY | 8,058 | 40 | 20.0% |
| City | Population | Air Quality Index | National Avg. |
| Crete, IL | 8,058 | 55 | 10.0% |
| Hempstead, TX | 8,056 | 52 | 4.0% |
| Sutherlin, OR | 8,060 | 24 | 52.0% |
| Fairwood CDP (Spokane County), WA | 8,055 | 45 | 10.0% |
| Rayne, LA | 8,062 | 41 | 18.0% |
| London, KY | 8,058 | 40 | 20.0% |
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