| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 45°F | 69°F | 56°F | 7.6" |
| February | 47°F | 71°F | 58°F | 9.0" |
| March | 51°F | 77°F | 64°F | 15.1" |
| April | 58°F | 83°F | 70°F | 6.7" |
| May | 64°F | 88°F | 75°F | 13.4" |
| June | 71°F | 91°F | 79°F | 9.8" |
| July | 72°F | 91°F | 80°F | 12.0" |
| August | 73°F | 91°F | 80°F | 7.7" |
| September | 70°F | 89°F | 78°F | 8.0" |
| October | 61°F | 83°F | 71°F | 8.4" |
| November | 52°F | 76°F | 63°F | 10.8" |
| December | 50°F | 73°F | 60°F | 6.6" |
| Index | Williston | Florida | National |
| Air quality index | 35 | 35 | 42 |
| Pollution index | 9,400,460 | 7,570,785 | 2,726,193 |
| Measurement | Total |
| Days measured | 364 |
| Days with good air quality | 329 |
| Days with moderate air quality | 35 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.030% |
| Benzene | 0.090% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.040% |
| Mercury | 0.100% |
| City | Population | Air Quality Index | National Avg. |
| Bronson, FL | 1,093 | 35 | 30.0% |
| Micanopy, FL | 493 | 35 | 30.0% |
| East Bronson, FL | 1,484 | 35 | 30.0% |
| Raleigh, FL | 901 | 35 | 30.0% |
| East Williston, FL | 460 | 35 | 30.0% |
| Williston, FL | 2,718 | 35 | 30.0% |
| City | Population | Air Quality Index | National Avg. |
| Daleville, VA | 2,716 | 38 | 24.0% |
| Desert Aire, WA | 2,716 | 38 | 24.0% |
| Raoul, GA | 2,720 | 37 | 26.0% |
| Wentworth, NC | 2,720 | 43 | 14.0% |
| Zion, PA | 2,720 | 44 | 12.0% |
| Williston, FL | 2,718 | 35 | 30.0% |
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