| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 27°F | 45°F | 35°F | 3.7" |
| February | 29°F | 47°F | 37°F | 2.9" |
| March | 39°F | 60°F | 48°F | 4.5" |
| April | 48°F | 71°F | 59°F | 6.3" |
| May | 57°F | 79°F | 68°F | 5.7" |
| June | 66°F | 87°F | 77°F | 5.3" |
| July | 69°F | 89°F | 79°F | 5.6" |
| August | 68°F | 89°F | 78°F | 3.7" |
| September | 61°F | 83°F | 71°F | 4.6" |
| October | 48°F | 71°F | 59°F | 4.4" |
| November | 38°F | 59°F | 48°F | 3.5" |
| December | 31°F | 48°F | 39°F | 4.8" |
| Index | Northfield | Kentucky | National |
| Air quality index | 49 | 45 | 42 |
| Pollution index | 10,162,700 | 1,369,131 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 195 |
| Days with moderate air quality | 166 |
| Days w/ poor A.Q. for sensitive groups | 4 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.060% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.050% |
| Mercury | 0.140% |
| City | Population | Air Quality Index | National Avg. |
| Glenview Manor, KY | 242 | 49 | 2.0% |
| Indian Hills, KY | 3,011 | 49 | 2.0% |
| Murray Hill, KY | 613 | 49 | 2.0% |
| Rolling Hills, KY | 1,009 | 49 | 2.0% |
| Beechwood Village, KY | 1,510 | 49 | 2.0% |
| Northfield, KY | 1,266 | 49 | 2.0% |
| City | Population | Air Quality Index | National Avg. |
| Quinebaug, CT | 1,266 | 40 | 20.0% |
| Grace, ID | 1,266 | 27 | 46.0% |
| Bon Aqua Junction, TN | 1,266 | 31 | 38.0% |
| Swan Hills, AB | 1,266 | n/a | |
| Cedar Ridge, CA | 1,267 | 39 | 22.0% |
| Northfield, KY | 1,266 | 49 | 2.0% |
Here are the best places to live in Kentucky
See the best places to live in Northfield
Most Dangerous Cities In The US
These are the 10 cheapest cities in Kentucky