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				| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation | 
| January | 35°F | 59°F | 46°F | 1.8" | 
| February | 40°F | 65°F | 52°F | 1.8" | 
| March | 47°F | 74°F | 60°F | 0.9" | 
| April | 53°F | 81°F | 66°F | 1.6" | 
| May | 61°F | 90°F | 76°F | 1.2" | 
| June | 73°F | 102°F | 88°F | 1.7" | 
| July | 80°F | 106°F | 93°F | 2.1" | 
| August | 77°F | 103°F | 90°F | 3.0" | 
| September | 68°F | 96°F | 82°F | 2.5" | 
| October | 56°F | 83°F | 68°F | 2.0" | 
| November | 44°F | 70°F | 56°F | 1.8" | 
| December | 35°F | 57°F | 45°F | 2.7" | 
| Index | Foothills | Henderson | Nevada | 
| Air quality index | 54 | 54 | 38 | 
| Pollution index | 5,460,430 | 5,460,430 | 2,601,914 | 
| Measurement | Total | 
| Days measured | 365 | 
| Days with good air quality | 154 | 
| Days with moderate air quality | 206 | 
| Days w/ poor A.Q. for sensitive groups | 5 | 
| Days with unhealthy air quality | 0 | 
| Pollutant | Total | 
| Arsenic | 0.000% | 
| Benzene | 0.070% | 
| Carbon Tetrachloride | 0.010% | 
| Lead | 0.040% | 
| Mercury | 0.001% | 
| City | Population | Air Quality Index | National Avg. | 
| Nellis AFB, NV | 3,770 | 54 | 8.0% | 
| Whitney, NV | 44,488 | 54 | 8.0% | 
| North Las Vegas, NV | 247,248 | 54 | 8.0% | 
| Winchester, NV | 36,302 | 54 | 8.0% | 
| Boulder City, NV | 16,048 | 54 | 8.0% | 
| Henderson, NV | 309,955 | 54 | 8.0% | 
| City | Population | Air Quality Index | National Avg. | 
| Stockton, CA | 311,103 | 45 | 10.0% | 
| St. Paul, MN | 305,877 | 46 | 8.0% | 
| St. Louis, MO | 304,709 | 54 | 8.0% | 
| Cincinnati, OH | 302,687 | 54 | 8.0% | 
| Pittsburgh, PA | 301,286 | 56 | 12.0% | 
| Henderson, NV | 309,955 | 54 | 8.0% |