| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 44°F | 66°F | 54°F | 13.7" |
| February | 47°F | 67°F | 56°F | 10.8" |
| March | 48°F | 69°F | 57°F | 3.2" |
| April | 48°F | 69°F | 58°F | 7.3" |
| May | 53°F | 71°F | 62°F | 2.1" |
| June | 57°F | 72°F | 65°F | 0.0" |
| July | 60°F | 76°F | 67°F | 0.0" |
| August | 59°F | 78°F | 67°F | 0.0" |
| September | 55°F | 77°F | 65°F | 1.2" |
| October | 53°F | 76°F | 63°F | 2.3" |
| November | 49°F | 73°F | 59°F | 1.5" |
| December | 43°F | 67°F | 54°F | 2.6" |
| Index | El Rio | California | National |
| Air quality index | 46 | 55 | 42 |
| Pollution index | 13,529,800 | 10,473,190 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 214 |
| Days with moderate air quality | 142 |
| Days w/ poor A.Q. for sensitive groups | 9 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.150% |
| Benzene | 0.190% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.180% |
| Mercury | 0.070% |
| City | Population | Air Quality Index | National Avg. |
| Channel Islands Beach, CA | 2,699 | 46 | 8.0% |
| Fillmore, CA | 15,631 | 46 | 8.0% |
| Ojai, CA | 7,613 | 46 | 8.0% |
| Oxnard, CA | 207,722 | 46 | 8.0% |
| Meiners Oaks, CA | 3,697 | 46 | 8.0% |
| El Rio, CA | 6,506 | 46 | 8.0% |
| City | Population | Air Quality Index | National Avg. |
| Garrett, IN | 6,507 | 45 | 10.0% |
| Estes Park, CO | 6,504 | 48 | 4.0% |
| Winsted, CT | 6,504 | 37 | 26.0% |
| Oakmont, PA | 6,504 | 56 | 12.0% |
| Purcell, OK | 6,508 | 48 | 4.0% |
| El Rio, CA | 6,506 | 46 | 8.0% |
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