| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 41°F | 66°F | 51°F | 4.8" |
| February | 42°F | 65°F | 52°F | 3.0" |
| March | 44°F | 66°F | 54°F | 2.9" |
| April | 46°F | 68°F | 55°F | 1.9" |
| May | 49°F | 67°F | 57°F | 0.7" |
| June | 52°F | 69°F | 59°F | 0.3" |
| July | 55°F | 71°F | 61°F | 0.6" |
| August | 55°F | 72°F | 62°F | 0.0" |
| September | 53°F | 74°F | 62°F | 0.2" |
| October | 50°F | 74°F | 60°F | 1.1" |
| November | 44°F | 70°F | 55°F | 2.8" |
| December | 40°F | 64°F | 50°F | 2.9" |
| Index | Ballard | California | National |
| Air quality index | 44 | 55 | 42 |
| Pollution index | 10,146,400 | 10,473,190 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 260 |
| Days with moderate air quality | 103 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.090% |
| Benzene | 0.160% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.110% |
| Mercury | 0.060% |
| City | Population | Air Quality Index | National Avg. |
| Buellton, CA | 5,276 | 44 | 12.0% |
| Solvang, CA | 5,644 | 44 | 12.0% |
| Los Alamos, CA | 1,275 | 44 | 12.0% |
| Goleta, CA | 32,142 | 44 | 12.0% |
| Los Olivos, CA | 838 | 44 | 12.0% |
| Ballard, CA | 764 | 44 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| Seligman, AZ | 764 | 43 | 14.0% |
| Colo, IA | 764 | 37 | 26.0% |
| Lockridge, IA | 764 | 29 | 42.0% |
| St. Clair, MN | 764 | 46 | 8.0% |
| Highland Hills, OH | 764 | 50 | = 100 |
| Ballard, CA | 764 | 44 | 12.0% |
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