| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 59°F | 76°F | 67°F | 4.2" |
| February | 60°F | 78°F | 68°F | 6.2" |
| March | 63°F | 80°F | 71°F | 6.1" |
| April | 68°F | 83°F | 75°F | 9.3" |
| May | 71°F | 86°F | 78°F | 12.7" |
| June | 75°F | 89°F | 81°F | 11.0" |
| July | 76°F | 89°F | 82°F | 10.6" |
| August | 77°F | 90°F | 83°F | 10.5" |
| September | 76°F | 89°F | 81°F | 10.0" |
| October | 72°F | 85°F | 78°F | 9.1" |
| November | 66°F | 81°F | 73°F | 5.2" |
| December | 64°F | 79°F | 71°F | 7.1" |
| Index | Tavernier | Florida | National |
| Air quality index | 41 | 35 | 42 |
| Pollution index | 43,296,200 | 7,570,785 | 2,726,193 |
| Measurement | Total |
| Days measured | 363 |
| Days with good air quality | 284 |
| Days with moderate air quality | 77 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.060% |
| Benzene | 0.510% |
| Carbon Tetrachloride | 0.150% |
| Lead | 0.330% |
| Mercury | 0.090% |
| City | Population | Air Quality Index | National Avg. |
| Islamorada, Village of Islands, FL | 6,384 | 41 | 18.0% |
| Key Largo, FL | 9,670 | 41 | 18.0% |
| Tavernier, FL | 1,980 | 41 | 18.0% |
| City | Population | Air Quality Index | National Avg. |
| Hollandale, MS | 1,980 | 43 | 14.0% |
| Shelter Island, NY | 1,980 | 37 | 26.0% |
| River Heights, UT | 1,980 | 44 | 12.0% |
| Ocean Park, WA | 1,980 | 20 | 60.0% |
| Cross Lake 19A, MB | 1,980 | n/a | |
| Tavernier, FL | 1,980 | 41 | 18.0% |
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