| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 43°F | 68°F | 55°F | 4.2" |
| February | 43°F | 69°F | 55°F | 3.8" |
| March | 48°F | 75°F | 61°F | 3.4" |
| April | 55°F | 81°F | 68°F | 2.6" |
| May | 62°F | 87°F | 74°F | 3.5" |
| June | 70°F | 90°F | 79°F | 6.3" |
| July | 72°F | 91°F | 80°F | 6.4" |
| August | 73°F | 91°F | 80°F | 7.9" |
| September | 69°F | 89°F | 77°F | 2.5" |
| October | 61°F | 83°F | 70°F | 4.4" |
| November | 49°F | 74°F | 61°F | 1.3" |
| December | 47°F | 71°F | 58°F | 3.9" |
| Index | Watertown | 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. |
| White Springs, FL | 966 | 38 | 24.0% |
| Five Points, FL | 1,276 | 38 | 24.0% |
| Lake City, FL | 12,166 | 38 | 24.0% |
| Watertown, FL | 2,381 | 38 | 24.0% |
| City | Population | Air Quality Index | National Avg. |
| Liberty, PA | 2,381 | 56 | 12.0% |
| Richwood, WV | 2,381 | 295 | 490.0% |
| Hayti, MO | 2,380 | 26 | 48.0% |
| Warsaw, MO | 2,380 | 39 | 22.0% |
| Mitchellville, IA | 2,382 | 39 | 22.0% |
| Watertown, FL | 2,381 | 38 | 24.0% |
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