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				| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation | 
| January | 49°F | 68°F | 58°F | 2.0" | 
| February | 51°F | 68°F | 59°F | 1.8" | 
| March | 54°F | 69°F | 61°F | 1.1" | 
| April | 56°F | 70°F | 63°F | 0.6" | 
| May | 60°F | 71°F | 65°F | 0.3" | 
| June | 63°F | 73°F | 67°F | 0.0" | 
| July | 67°F | 77°F | 71°F | 0.2" | 
| August | 68°F | 78°F | 72°F | 0.1" | 
| September | 66°F | 79°F | 72°F | 0.2" | 
| October | 61°F | 77°F | 68°F | 0.7" | 
| November | 55°F | 73°F | 64°F | 0.9" | 
| December | 50°F | 68°F | 58°F | 2.3" | 
| Index | Coronado | California | National | 
| Air quality index | 64 | 55 | 42 | 
| Pollution index | 45,820,500 | 10,473,190 | 2,726,193 | 
| Measurement | Total | 
| Days measured | 365 | 
| Days with good air quality | 87 | 
| Days with moderate air quality | 253 | 
| Days w/ poor A.Q. for sensitive groups | 23 | 
| Days with unhealthy air quality | 2 | 
| Pollutant | Total | 
| Arsenic | 1.130% | 
| Benzene | 0.410% | 
| Carbon Tetrachloride | 0.030% | 
| Lead | 0.600% | 
| Mercury | 0.080% | 
| City | Population | Air Quality Index | National Avg. | 
| Imperial Beach, CA | 27,334 | 64 | 28.0% | 
| San Diego, CA | 1,414,545 | 64 | 28.0% | 
| Casa de Oro-Mount Helix, CA | 19,327 | 64 | 28.0% | 
| Santee, CA | 57,407 | 64 | 28.0% | 
| La Presa, CA | 37,410 | 64 | 28.0% | 
| Coronado, CA | 24,526 | 64 | 28.0% | 
| City | Population | Air Quality Index | National Avg. | 
| Homer Glen, IL | 24,521 | 55 | 10.0% | 
| Ottumwa, IA | 24,505 | 29 | 42.0% | 
| Rockville Centre, NY | 24,552 | 51 | 2.0% | 
| Key West, FL | 24,495 | 34 | 32.0% | 
| Norton Shores, MI | 24,557 | 38 | 24.0% | 
| Coronado, CA | 24,526 | 64 | 28.0% |