| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 43°F | 66°F | 53°F | 4.6" |
| February | 44°F | 69°F | 55°F | 4.0" |
| March | 50°F | 75°F | 62°F | 4.0" |
| April | 57°F | 81°F | 68°F | 4.0" |
| May | 63°F | 87°F | 75°F | 4.9" |
| June | 71°F | 90°F | 80°F | 7.0" |
| July | 73°F | 91°F | 81°F | 7.0" |
| August | 74°F | 91°F | 81°F | 8.6" |
| September | 70°F | 88°F | 78°F | 4.5" |
| October | 59°F | 82°F | 70°F | 2.0" |
| November | 49°F | 74°F | 60°F | 2.0" |
| December | 48°F | 70°F | 58°F | 3.4" |
| Index | Mayo | Florida | National |
| Air quality index | 38 | 35 | 50 |
| Pollution index | 4,019,130 | 15,391,344 | 5,066,862 |
| 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, State | Population | Air Quality Index | National Avg. |
| Mosses, AL | 1,104 | 52 | 4% |
| North Topsail Beach, NC | 1,104 | 34 | 32% |
| Greenville, NH | 1,104 | 37 | 26% |
| Bayard, NE | 1,104 | 19 | 62% |
| Bowmanstown, PA | 1,104 | 42 | 16% |
| Mayo, FL | 1,104 | 38 | 24% |
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