| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 57°F | 77°F | 67°F | 2.6" |
| February | 57°F | 79°F | 68°F | 2.5" |
| March | 61°F | 80°F | 71°F | 3.3" |
| April | 66°F | 84°F | 75°F | 3.9" |
| May | 71°F | 87°F | 79°F | 5.7" |
| June | 74°F | 89°F | 81°F | 8.1" |
| July | 76°F | 91°F | 83°F | 6.0" |
| August | 77°F | 92°F | 84°F | 9.4" |
| September | 75°F | 89°F | 82°F | 7.5" |
| October | 71°F | 86°F | 79°F | 6.3" |
| November | 65°F | 82°F | 73°F | 2.8" |
| December | 62°F | 79°F | 70°F | 3.9" |
| Index | San Castle | Florida | National |
| Air quality index | 36 | 35 | 42 |
| Pollution index | 30,648,300 | 7,570,785 | 2,726,193 |
| Measurement | Total |
| Days measured | 353 |
| Days with good air quality | 324 |
| Days with moderate air quality | 29 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.040% |
| Benzene | 0.370% |
| Carbon Tetrachloride | 0.080% |
| Lead | 0.150% |
| Mercury | 0.030% |
| City | Population | Air Quality Index | National Avg. |
| Pine Air, FL | 2,488 | 36 | 28.0% |
| Loxahatchee Groves, FL | 3,557 | 36 | 28.0% |
| Stacey Street, FL | 610 | 36 | 28.0% |
| Cloud Lake, FL | 400 | 36 | 28.0% |
| Mangonia Park, FL | 2,228 | 36 | 28.0% |
| San Castle, FL | 4,061 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Boyertown, PA | 4,061 | 42 | 16.0% |
| Central Kootenay E, BC | 4,061 | n/a | |
| Dannemora, NY | 4,060 | 37 | 26.0% |
| Clearwater, SC | 4,060 | 47 | 6.0% |
| Crescent Springs, KY | 4,062 | 54 | 8.0% |
| San Castle, FL | 4,061 | 36 | 28.0% |
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