| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 49°F | 73°F | 60°F | 2.5" |
| February | 51°F | 75°F | 62°F | 2.3" |
| March | 55°F | 79°F | 66°F | 2.6" |
| April | 61°F | 84°F | 72°F | 2.8" |
| May | 67°F | 89°F | 77°F | 3.9" |
| June | 73°F | 91°F | 80°F | 7.7" |
| July | 75°F | 93°F | 82°F | 6.2" |
| August | 75°F | 93°F | 82°F | 6.9" |
| September | 73°F | 90°F | 80°F | 6.5" |
| October | 66°F | 85°F | 74°F | 4.6" |
| November | 58°F | 79°F | 67°F | 1.6" |
| December | 54°F | 76°F | 64°F | 1.7" |
| Index | Lake Kathryn | Florida | National |
| Air quality index | 37 | 35 | 42 |
| Pollution index | 12,822,300 | 7,570,785 | 2,726,193 |
| Measurement | Total |
| Days measured | 355 |
| Days with good air quality | 321 |
| Days with moderate air quality | 34 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.020% |
| Benzene | 0.160% |
| Carbon Tetrachloride | 0.030% |
| Lead | 0.270% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Altoona, FL | 77 | 37 | 26.0% |
| Lake Mack-Forest Hills, FL | 2,425 | 37 | 26.0% |
| Pine Lakes, FL | 1,127 | 37 | 26.0% |
| Umatilla, FL | 3,814 | 37 | 26.0% |
| Deltona, FL | 91,847 | 37 | 26.0% |
| Lake Kathryn, FL | 737 | 37 | 26.0% |
| City | Population | Air Quality Index | National Avg. |
| Clyde, CA | 737 | 40 | 20.0% |
| Fairplay, CO | 737 | 47 | 6.0% |
| Lawtell, LA | 737 | 41 | 18.0% |
| Kasota, MN | 737 | 46 | 8.0% |
| Loretto, MN | 737 | 46 | 8.0% |
| Lake Kathryn, FL | 737 | 37 | 26.0% |
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