| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 30°F | 60°F | 44°F | 1.6" |
| February | 34°F | 64°F | 48°F | 1.2" |
| March | 40°F | 70°F | 54°F | 0.6" |
| April | 44°F | 76°F | 59°F | 0.3" |
| May | 53°F | 84°F | 68°F | 0.1" |
| June | 62°F | 94°F | 78°F | 0.0" |
| July | 68°F | 100°F | 84°F | 0.2" |
| August | 65°F | 99°F | 83°F | 0.0" |
| September | 56°F | 93°F | 75°F | 0.2" |
| October | 46°F | 81°F | 63°F | 0.4" |
| November | 36°F | 70°F | 52°F | 0.4" |
| December | 30°F | 59°F | 43°F | 1.0" |
| Index | Lancaster | California | National |
| Air quality index | 72 | 55 | 50 |
| Pollution index | 21,095,500 | 18,106,726 | 5,066,862 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 66 |
| Days with moderate air quality | 208 |
| Days w/ poor A.Q. for sensitive groups | 62 |
| Days with unhealthy air quality | 28 |
| Pollutant | Total |
| Arsenic | 1.700% |
| Benzene | 0.350% |
| Carbon Tetrachloride | 0.004% |
| Lead | 0.580% |
| Mercury | 1.550% |
| City, State | Population | Air Quality Index | National Avg. |
| Rosamond, CA | 19,672 | 67 | 34% |
| Desert View Highlands, CA | 2,484 | 72 | 44% |
| Agua Dulce, CA | 3,541 | 72 | 44% |
| Leona Valley, CA | 1,582 | 72 | 44% |
| Littlerock, CA | 1,786 | 72 | 44% |
| Lancaster, CA | 159,651 | 72 | 44% |
| City, State | Population | Air Quality Index | National Avg. |
| Peoria, AZ | 158,677 | 74 | 48% |
| Corona, CA | 161,614 | 89 | 78% |
| Eugene, OR | 161,649 | 38 | 24% |
| Salem, OR | 161,975 | 32 | 36% |
| Fort Collins, CO | 157,251 | 48 | 4% |
| Lancaster, CA | 159,651 | 72 | 44% |
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