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				| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation | 
| January | 44°F | 70°F | 56°F | 1.6" | 
| February | 45°F | 72°F | 57°F | 1.2" | 
| March | 47°F | 75°F | 60°F | 0.7" | 
| April | 50°F | 78°F | 63°F | 0.5" | 
| May | 55°F | 82°F | 66°F | 0.2" | 
| June | 59°F | 89°F | 72°F | 0.0" | 
| July | 65°F | 94°F | 77°F | 0.2" | 
| August | 65°F | 95°F | 78°F | 0.1" | 
| September | 63°F | 94°F | 76°F | 0.2" | 
| October | 56°F | 85°F | 69°F | 0.2" | 
| November | 49°F | 77°F | 62°F | 0.5" | 
| December | 44°F | 69°F | 55°F | 1.9" | 
| Index | Hudson | San Bernardino | California | 
| Air quality index | 89 | 89 | 55 | 
| Pollution index | 31,575,300 | 31,575,300 | 10,473,190 | 
| Measurement | Total | 
| Days measured | 365 | 
| Days with good air quality | 42 | 
| Days with moderate air quality | 178 | 
| Days w/ poor A.Q. for sensitive groups | 79 | 
| Days with unhealthy air quality | 58 | 
| Pollutant | Total | 
| Arsenic | 0.110% | 
| Benzene | 0.260% | 
| Carbon Tetrachloride | 0.020% | 
| Lead | 0.350% | 
| Mercury | 0.280% | 
| City | Population | Air Quality Index | National Avg. | 
| Colton, CA | 54,215 | 89 | 78.0% | 
| Loma Linda, CA | 24,239 | 89 | 78.0% | 
| Crestline, CA | 9,351 | 89 | 78.0% | 
| Muscoy, CA | 11,546 | 89 | 78.0% | 
| Grand Terrace, CA | 12,559 | 89 | 78.0% | 
| San Bernardino, CA | 216,784 | 89 | 78.0% | 
| City | Population | Air Quality Index | National Avg. | 
| Tacoma, WA | 215,766 | 18 | 64.0% | 
| Des Moines, IA | 215,408 | 39 | 22.0% | 
| Richmond Hill, ON | 215,407 | n/a | |
| Spring Valley, NV | 218,697 | 54 | 8.0% | 
| Enterprise, NV | 214,591 | 54 | 8.0% | 
| San Bernardino, CA | 216,784 | 89 | 78.0% |