| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 51°F | 71°F | 61°F | 2.8" |
| February | 53°F | 74°F | 63°F | 2.0" |
| March | 57°F | 78°F | 68°F | 2.6" |
| April | 63°F | 84°F | 74°F | 1.9" |
| May | 67°F | 88°F | 78°F | 3.6" |
| June | 73°F | 90°F | 81°F | 10.9" |
| July | 74°F | 90°F | 82°F | 10.6" |
| August | 75°F | 91°F | 82°F | 9.7" |
| September | 73°F | 89°F | 81°F | 8.9" |
| October | 66°F | 84°F | 75°F | 3.6" |
| November | 58°F | 78°F | 68°F | 1.8" |
| December | 56°F | 75°F | 65°F | 1.2" |
| Index | Seffner | Florida | National |
| Air quality index | 43 | 35 | 42 |
| Pollution index | 4,416,470 | 7,570,785 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 267 |
| Days with moderate air quality | 92 |
| Days w/ poor A.Q. for sensitive groups | 6 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.060% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.020% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Kathleen, FL | 6,639 | 36 | 28.0% |
| Plant City, FL | 40,706 | 36 | 28.0% |
| Zephyrhills South, FL | 5,360 | 36 | 28.0% |
| Crystal Springs, FL | 890 | 36 | 28.0% |
| Lake Magdalene, FL | 33,029 | 43 | 14.0% |
| Seffner, FL | 8,561 | 43 | 14.0% |
| City | Population | Air Quality Index | National Avg. |
| Oak Hill, WV | 8,559 | 295 | 490.0% |
| Somers, WI | 8,564 | 39 | 22.0% |
| Orrville, OH | 8,565 | 43 | 14.0% |
| Boischatel, QC | 8,556 | n/a | |
| Grandview Heights, OH | 8,554 | 46 | 8.0% |
| Seffner, FL | 8,561 | 43 | 14.0% |