| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 41°F | 66°F | 53°F | 4.3" |
| February | 43°F | 66°F | 54°F | 3.2" |
| March | 46°F | 68°F | 56°F | 2.0" |
| April | 48°F | 69°F | 58°F | 1.2" |
| May | 51°F | 71°F | 60°F | 0.2" |
| June | 54°F | 72°F | 62°F | 0.2" |
| July | 58°F | 74°F | 65°F | 0.0" |
| August | 58°F | 75°F | 65°F | 0.0" |
| September | 56°F | 76°F | 65°F | 0.1" |
| October | 51°F | 76°F | 63°F | 0.8" |
| November | 45°F | 72°F | 57°F | 1.1" |
| December | 40°F | 65°F | 52°F | 2.8" |
| Index | Summerland | 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. |
| Montecito, CA | 8,210 | 44 | 12.0% |
| Santa Barbara, CA | 90,911 | 44 | 12.0% |
| Carpinteria, CA | 13,449 | 44 | 12.0% |
| Toro Canyon, CA | 1,918 | 44 | 12.0% |
| Mission Canyon, CA | 2,649 | 44 | 12.0% |
| Summerland, CA | 745 | 44 | 12.0% |
| City | Population | Air Quality Index | National Avg. |
| Plumerville, AR | 745 | 45 | 10.0% |
| Doyle, CA | 745 | 46 | 8.0% |
| Early, IA | 745 | 35 | 30.0% |
| Shannon, IL | 745 | 42 | 16.0% |
| Lanesville, IN | 745 | 49 | 2.0% |
| Summerland, CA | 745 | 44 | 12.0% |
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