| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 35°F | 45°F | 40°F | 1.2" |
| February | 37°F | 48°F | 41°F | 2.3" |
| March | 40°F | 51°F | 45°F | 2.5" |
| April | 42°F | 56°F | 48°F | 0.6" |
| May | 46°F | 61°F | 53°F | 1.2" |
| June | 50°F | 66°F | 57°F | 0.9" |
| July | 52°F | 71°F | 60°F | 0.0" |
| August | 52°F | 71°F | 61°F | 0.0" |
| September | 50°F | 66°F | 57°F | 0.5" |
| October | 45°F | 57°F | 51°F | 2.9" |
| November | 40°F | 50°F | 44°F | 2.4" |
| December | 35°F | 44°F | 39°F | 1.4" |
| Index | Edison | Washington | National |
| Air quality index | 24 | 36 | 50 |
| Pollution index | 15,778,900 | 8,596,989 | 5,066,862 |
| 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 | 0.010% |
| Benzene | 0.270% |
| Carbon Tetrachloride | 0.040% |
| Lead | 0.160% |
| Mercury | 0.003% |
| City, State | Population | Air Quality Index | National Avg. |
| Whidbey Island Station, WA | 1,970 | 24 | 52% |
| La Conner, WA | 782 | 24 | 52% |
| Anacortes, WA | 16,229 | 24 | 52% |
| Burlington, WA | 8,572 | 24 | 52% |
| Bay View, WA | 700 | 24 | 52% |
| Edison, WA | 135 | 24 | 52% |
| City, State | Population | Air Quality Index | National Avg. |
| Esbon, KS | 135 | 19 | 62% |
| Neosho Falls, KS | 135 | 22 | 56% |
| Palmetto, LA | 135 | 41 | 18% |
| Hutton, MD | 135 | 36 | 28% |
| Grayson, OK | 135 | 5 | 90% |
| Edison, WA | 135 | 24 | 52% |
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