| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 51°F | 63°F | 56°F | 2.8" |
| February | 50°F | 62°F | 55°F | 2.7" |
| March | 50°F | 64°F | 56°F | 1.0" |
| April | 51°F | 66°F | 57°F | 0.8" |
| May | 53°F | 68°F | 59°F | 0.5" |
| June | 56°F | 73°F | 63°F | 0.1" |
| July | 60°F | 78°F | 68°F | 0.1" |
| August | 62°F | 79°F | 70°F | 0.0" |
| September | 63°F | 79°F | 70°F | 0.1" |
| October | 59°F | 74°F | 66°F | 0.7" |
| November | 55°F | 69°F | 61°F | 1.1" |
| December | 50°F | 62°F | 55°F | 2.1" |
| Index | Avalon | California | National |
| Air quality index | 72 | 55 | 42 |
| Pollution index | 4,251,410 | 10,473,190 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 66 |
| Days with moderate air quality | 208 |
| Days w/ poor A.Q. for sensitive groups | 62 |
| Days with unhealthy air quality | 28 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.100% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Avalon, CA | 3,738 | 72 | 44.0% |
| City | Population | Air Quality Index | National Avg. |
| North Yelm, WA | 3,738 | 30 | 40.0% |
| Eastover, NC | 3,740 | 41 | 18.0% |
| West Bradenton, FL | 3,735 | 38 | 24.0% |
| Stanley, NC | 3,734 | 36 | 28.0% |
| Eagle Lake, TX | 3,742 | 52 | 4.0% |
| Avalon, CA | 3,738 | 72 | 44.0% |
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