| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 40°F | 65°F | 50°F | 8.5" |
| February | 44°F | 65°F | 53°F | 3.7" |
| March | 46°F | 69°F | 55°F | 4.4" |
| April | 44°F | 70°F | 55°F | 2.3" |
| May | 49°F | 73°F | 59°F | 3.9" |
| June | 50°F | 75°F | 60°F | 0.4" |
| July | 54°F | 78°F | 63°F | 0.0" |
| August | 54°F | 79°F | 63°F | 0.4" |
| September | 52°F | 77°F | 62°F | 0.1" |
| October | 50°F | 77°F | 60°F | 1.9" |
| November | 46°F | 75°F | 57°F | 1.6" |
| December | 41°F | 66°F | 52°F | 6.4" |
| Index | Edna | 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. |
| Arroyo Grande, CA | 17,924 | 46 | 8.0% |
| Los Osos, CA | 16,174 | 46 | 8.0% |
| Los Berros, CA | 301 | 46 | 8.0% |
| Pismo Beach, CA | 8,042 | 46 | 8.0% |
| Avila Beach, CA | 1,455 | 46 | 8.0% |
| Edna, CA | 408 | 46 | 8.0% |
| City | Population | Air Quality Index | National Avg. |
| Hammondville, AL | 408 | 39 | 22.0% |
| Greasewood, AZ | 408 | 17 | 66.0% |
| Wenden, AZ | 408 | 13 | 74.0% |
| Shady Dale, GA | 408 | 38 | 24.0% |
| Hanalei, HI | 408 | 13 | 74.0% |
| Edna, CA | 408 | 46 | 8.0% |
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