| 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 | 29 | 35 | 50 |
| Pollution index | 30,648,300 | 15,391,344 | 5,066,862 |
| Measurement | Total |
| Days measured | 352 |
| Days with good air quality | 323 |
| Days with moderate air quality | 29 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.040% |
| Benzene | 0.370% |
| Carbon Tetrachloride | 0.080% |
| Lead | 0.150% |
| Mercury | 0.030% |
| City, State | Population | Air Quality Index | National Avg. |
| Haverhill, FL | 1,984 | 29 | 42% |
| Lake Belvedere Estates, FL | 3,878 | 29 | 42% |
| Loxahatchee Groves, FL | 3,342 | 29 | 42% |
| Palm Beach, FL | 8,501 | 29 | 42% |
| Plantation Mobile Home Park, FL | 1,280 | 29 | 42% |
| San Castle, FL | 4,622 | 29 | 42% |
| City, State | Population | Air Quality Index | National Avg. |
| Jonesboro, LA | 4,623 | 56 | 12% |
| Barnwell, SC | 4,623 | 42 | 16% |
| Dacono, CO | 4,623 | 42 | 16% |
| Running Springs, CA | 4,624 | 85 | 70% |
| Peppermill Village, MD | 4,620 | 49 | 2% |
| San Castle, FL | 4,622 | 29 | 42% |