| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 27°F | 82°F | 57°F | 2.2" |
| February | 27°F | 82°F | 58°F | 2.8" |
| March | 36°F | 88°F | 64°F | 1.7" |
| April | 39°F | 91°F | 70°F | 2.1" |
| May | 55°F | 99°F | 76°F | 3.8" |
| June | 66°F | 102°F | 81°F | 5.7" |
| July | 69°F | 101°F | 83°F | 8.2" |
| August | 68°F | 103°F | 84°F | 6.2" |
| September | 60°F | 95°F | 81°F | 3.0" |
| October | 38°F | 95°F | 73°F | 3.8" |
| November | 34°F | 86°F | 63°F | 0.9" |
| December | 32°F | 83°F | 59°F | 3.2" |
| Index | Jacksonville Heights | Jacksonville | Florida |
| Air quality index | 38 | 38 | 35 |
| Pollution index | 6,554,710 | 6,554,710 | 15,391,344 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 300 |
| Days with moderate air quality | 63 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.020% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.070% |
| Mercury | 0.010% |
| City, State | Population | Air Quality Index | National Avg. |
| Fleming Island, FL | 29,247 | 38 | 24% |
| Oakleaf Plantation, FL | 25,447 | 38 | 24% |
| Asbury Lake, FL | 8,744 | 38 | 24% |
| Fruit Cove, FL | 31,419 | 38 | 24% |
| Orange Park, FL | 8,603 | 38 | 24% |
| Jacksonville, FL | 856,616 | 38 | 24% |
| City, State | Population | Air Quality Index | National Avg. |
| San Francisco, CA | 850,282 | 43 | 14% |
| Indianapolis, IN | 846,674 | 59 | 18% |
| Columbus, OH | 837,038 | 43 | 14% |
| Fort Worth, TX | 815,930 | 54 | 8% |
| Charlotte, NC | 808,834 | 42 | 16% |
| Jacksonville, FL | 856,616 | 38 | 24% |