| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 33°F | 46°F | 39°F | 3.0" |
| February | 34°F | 50°F | 41°F | 1.7" |
| March | 37°F | 54°F | 45°F | 3.4" |
| April | 40°F | 59°F | 48°F | 2.0" |
| May | 45°F | 65°F | 54°F | 2.4" |
| June | 49°F | 70°F | 59°F | 1.9" |
| July | 52°F | 77°F | 63°F | 1.3" |
| August | 52°F | 78°F | 63°F | 1.4" |
| September | 49°F | 71°F | 58°F | 2.4" |
| October | 43°F | 60°F | 50°F | 3.4" |
| November | 37°F | 52°F | 44°F | 4.0" |
| December | 32°F | 44°F | 38°F | 3.1" |
| Index | Cavalero | Washington | National |
| Air quality index | 24 | 36 | 42 |
| Pollution index | 1,626,160 | 4,541,850 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 361 |
| Days with moderate air quality | 4 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.005% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.020% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Oak Harbor, WA | 23,358 | 24 | 52.0% |
| Lake Goodwin, WA | 4,613 | 24 | 52.0% |
| Bryant, WA | 2,142 | 24 | 52.0% |
| Kayak Point, WA | 1,500 | 24 | 52.0% |
| Stanwood, WA | 7,228 | 24 | 52.0% |
| Cavalero, WA | 5,395 | 24 | 52.0% |
| City | Population | Air Quality Index | National Avg. |
| Pearl Beach, MI | 5,395 | 56 | 12.0% |
| Niverville, MB | 5,395 | n/a | |
| Frankenmuth, MI | 5,396 | 26 | 48.0% |
| Chester, SC | 5,392 | 36 | 28.0% |
| Cowichan Valley A, BC | 5,392 | n/a | |
| Cavalero, WA | 5,395 | 24 | 52.0% |
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