| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 24°F | 48°F | 35°F | 1.4" |
| February | 28°F | 55°F | 40°F | 1.1" |
| March | 32°F | 62°F | 46°F | 0.6" |
| April | 37°F | 68°F | 51°F | 0.5" |
| May | 45°F | 76°F | 60°F | 0.6" |
| June | 53°F | 87°F | 70°F | 0.3" |
| July | 61°F | 96°F | 79°F | 0.3" |
| August | 58°F | 93°F | 76°F | 0.2" |
| September | 50°F | 86°F | 67°F | 0.1" |
| October | 40°F | 73°F | 55°F | 0.8" |
| November | 30°F | 60°F | 44°F | 0.6" |
| December | 23°F | 48°F | 35°F | 1.1" |
| Index | Southwest | Reno | Nevada |
| Air quality index | 46 | 46 | 38 |
| Pollution index | 26,667,300 | 26,667,300 | 2,601,914 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 244 |
| Days with moderate air quality | 121 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.360% |
| Benzene | 0.250% |
| Carbon Tetrachloride | 0.100% |
| Lead | 0.250% |
| Mercury | 0.260% |
| City | Population | Air Quality Index | National Avg. |
| Virginia City, NV | 661 | 41 | 18.0% |
| Washoe Valley, NV | 2,724 | 41 | 18.0% |
| Floriston, CA | 28 | 44 | 12.0% |
| Sparks, NV | 102,895 | 46 | 8.0% |
| Cold Springs, NV | 10,704 | 46 | 8.0% |
| Reno, NV | 250,903 | 46 | 8.0% |
| City | Population | Air Quality Index | National Avg. |
| Glendale, AZ | 250,290 | 74 | 48.0% |
| Longueuil, QC | 249,920 | n/a | |
| Gilbert, AZ | 248,349 | 74 | 48.0% |
| North Las Vegas, NV | 247,248 | 54 | 8.0% |
| Scottsdale, AZ | 254,995 | 74 | 48.0% |
| Reno, NV | 250,903 | 46 | 8.0% |
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