| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 39°F | 72°F | 54°F | 0.7" |
| February | 43°F | 76°F | 59°F | 0.5" |
| March | 49°F | 84°F | 67°F | 0.1" |
| April | 55°F | 89°F | 72°F | 0.0" |
| May | 62°F | 96°F | 80°F | 0.0" |
| June | 69°F | 105°F | 89°F | 0.0" |
| July | 77°F | 109°F | 94°F | 0.1" |
| August | 75°F | 108°F | 93°F | 0.2" |
| September | 68°F | 103°F | 86°F | 0.4" |
| October | 57°F | 92°F | 75°F | 0.3" |
| November | 45°F | 81°F | 63°F | 0.1" |
| December | 37°F | 71°F | 53°F | 0.5" |
| Index | Indio | California | National |
| Air quality index | 89 | 55 | 42 |
| Pollution index | 31,575,300 | 10,473,190 | 2,726,193 |
| 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. |
| Coachella, CA | 45,658 | 58 | 16.0% |
| Vista Santa Rosa, CA | 2,072 | 58 | 16.0% |
| Mecca, CA | 5,541 | 58 | 16.0% |
| Thermal, CA | 1,371 | 58 | 16.0% |
| La Quinta, CA | 41,650 | 89 | 78.0% |
| Indio, CA | 89,996 | 89 | 78.0% |
| City | Population | Air Quality Index | National Avg. |
| Toms River, NJ | 90,081 | 41 | 18.0% |
| Town 'n' Country, FL | 89,791 | 43 | 14.0% |
| Fall River, MA | 89,618 | 44 | 12.0% |
| Germantown, MD | 89,529 | 47 | 6.0% |
| San Leandro, CA | 90,489 | 40 | 20.0% |
| Indio, CA | 89,996 | 89 | 78.0% |
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