| 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 | Borrego Springs | California | National |
| Air quality index | 64 | 55 | 42 |
| Pollution index | 162,740 | 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 | 0.000% |
| Benzene | 0.003% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Oasis, CA | 2,614 | 58 | 16.0% |
| Julian, CA | 1,359 | 64 | 28.0% |
| Borrego Springs, CA | 1,905 | 64 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| North Corbin, KY | 1,905 | 40 | 20.0% |
| West Falmouth, MA | 1,905 | 36 | 28.0% |
| Harbor Beach, MI | 1,905 | 26 | 48.0% |
| Tillson, NY | 1,905 | 36 | 28.0% |
| Piney Mountain, VA | 1,905 | 26 | 48.0% |
| Borrego Springs, CA | 1,905 | 64 | 28.0% |