| 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 | Royal Palm Beach | 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. |
| Gun Club Estates, FL | 1,092 | 36 | 28.0% |
| Cabana Colony, FL | 2,660 | 36 | 28.0% |
| Palm Beach Gardens, FL | 56,979 | 36 | 28.0% |
| The Acreage, FL | 39,863 | 36 | 28.0% |
| Glen Ridge, FL | 203 | 36 | 28.0% |
| Royal Palm Beach, FL | 39,615 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Romeoville, IL | 39,644 | 55 | 10.0% |
| Indian Trail, NC | 39,644 | 49 | 2.0% |
| Marlborough, MA | 39,663 | 40 | 20.0% |
| Crystal Lake, IL | 39,685 | 42 | 16.0% |
| Columbia, TN | 39,515 | 31 | 38.0% |
| Royal Palm Beach, FL | 39,615 | 36 | 28.0% |
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