| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 36°F | 46°F | 41°F | 2.9" |
| February | 35°F | 49°F | 41°F | 1.9" |
| March | 38°F | 52°F | 45°F | 2.3" |
| April | 41°F | 55°F | 47°F | 2.0" |
| May | 46°F | 60°F | 52°F | 1.8" |
| June | 50°F | 63°F | 55°F | 1.8" |
| July | 53°F | 68°F | 59°F | 0.7" |
| August | 53°F | 68°F | 59°F | 1.5" |
| September | 49°F | 65°F | 56°F | 1.4" |
| October | 45°F | 58°F | 51°F | 1.8" |
| November | 40°F | 51°F | 45°F | 3.5" |
| December | 35°F | 46°F | 40°F | 2.2" |
| Index | Whidbey Island Station | 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. |
| Bay View, WA | 686 | 24 | 52.0% |
| Burlington, WA | 9,267 | 24 | 52.0% |
| Lake Ketchum, WA | 1,313 | 24 | 52.0% |
| Coupeville, WA | 1,911 | 24 | 52.0% |
| Camano, WA | 17,523 | 24 | 52.0% |
| Whidbey Island Station, WA | 2,452 | 24 | 52.0% |
| City | Population | Air Quality Index | National Avg. |
| Calwa, CA | 2,452 | 60 | 20.0% |
| Pine Beach, NJ | 2,452 | 41 | 18.0% |
| Ponder, TX | 2,452 | 51 | 2.0% |
| Wray, CO | 2,451 | 45 | 10.0% |
| Stonewall, LA | 2,451 | 39 | 22.0% |
| Whidbey Island Station, WA | 2,452 | 24 | 52.0% |