| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 41°F | 70°F | 54°F | 3.5" |
| February | 42°F | 72°F | 56°F | 3.3" |
| March | 47°F | 78°F | 62°F | 2.9" |
| April | 54°F | 83°F | 68°F | 2.6" |
| May | 61°F | 89°F | 74°F | 3.7" |
| June | 70°F | 92°F | 80°F | 7.2" |
| July | 72°F | 93°F | 81°F | 8.9" |
| August | 73°F | 92°F | 81°F | 10.3" |
| September | 69°F | 90°F | 78°F | 6.2" |
| October | 58°F | 85°F | 70°F | 2.3" |
| November | 47°F | 77°F | 61°F | 2.0" |
| December | 45°F | 73°F | 57°F | 3.5" |
| Index | Branford | Florida | National |
| Air quality index | 38 | 35 | 42 |
| Pollution index | 4,019,130 | 7,570,785 | 2,726,193 |
| Measurement | Total |
| Days measured | 363 |
| Days with good air quality | 294 |
| Days with moderate air quality | 69 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.080% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.010% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Bell, FL | 592 | 35 | 30.0% |
| Spring Ridge, FL | 314 | 35 | 30.0% |
| Fort White, FL | 726 | 38 | 24.0% |
| Mayo, FL | 1,571 | 38 | 24.0% |
| Branford, FL | 897 | 38 | 24.0% |
| City | Population | Air Quality Index | National Avg. |
| Toksook Bay, AK | 897 | 31 | 38.0% |
| Many Farms, AZ | 897 | 17 | 66.0% |
| Occidental, CA | 897 | 34 | 32.0% |
| Matherville, IL | 897 | 46 | 8.0% |
| Sheridan, MT | 897 | 20 | 60.0% |
| Branford, FL | 897 | 38 | 24.0% |