| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 42°F | 62°F | 52°F | 11.7" |
| February | 46°F | 64°F | 54°F | 5.4" |
| March | 49°F | 65°F | 56°F | 1.9" |
| April | 46°F | 62°F | 54°F | 2.2" |
| May | 50°F | 63°F | 56°F | 3.1" |
| June | 51°F | 64°F | 57°F | 0.3" |
| July | 53°F | 67°F | 58°F | 0.2" |
| August | 54°F | 69°F | 59°F | 0.2" |
| September | 52°F | 70°F | 59°F | 0.2" |
| October | 49°F | 71°F | 58°F | 1.2" |
| November | 47°F | 69°F | 56°F | 1.5" |
| December | 43°F | 64°F | 52°F | 2.3" |
| Index | Vandenberg AFB | California | National |
| Air quality index | 46 | 55 | 42 |
| Pollution index | 5,611,110 | 10,473,190 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 230 |
| Days with moderate air quality | 132 |
| Days w/ poor A.Q. for sensitive groups | 3 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.020% |
| Benzene | 0.060% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.060% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Los Alamos, CA | 1,275 | 44 | 12.0% |
| Orcutt, CA | 31,353 | 46 | 8.0% |
| Casmalia, CA | 88 | 46 | 8.0% |
| Santa Maria, CA | 105,528 | 46 | 8.0% |
| Mission Hills, CA | 3,509 | 46 | 8.0% |
| Vandenberg AFB, CA | 3,646 | 46 | 8.0% |
| City | Population | Air Quality Index | National Avg. |
| Mono Vista, CA | 3,646 | 39 | 22.0% |
| Blythewood, SC | 3,646 | 43 | 14.0% |
| Columbus, TX | 3,645 | 31 | 38.0% |
| Gaylord, MI | 3,644 | 36 | 28.0% |
| Morris-Turnberry, ON | 3,644 | n/a | |
| Vandenberg AFB, CA | 3,646 | 46 | 8.0% |
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