| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 34°F | 46°F | 39°F | 4.4" |
| February | 36°F | 52°F | 43°F | 4.5" |
| March | 40°F | 60°F | 49°F | 6.7" |
| April | 42°F | 61°F | 51°F | 4.9" |
| May | 48°F | 70°F | 58°F | 4.0" |
| June | 51°F | 72°F | 61°F | 4.2" |
| July | 57°F | 84°F | 69°F | 1.7" |
| August | 54°F | 84°F | 67°F | 5.0" |
| September | 48°F | 75°F | 60°F | 3.9" |
| October | 47°F | 63°F | 54°F | 5.4" |
| November | 38°F | 51°F | 44°F | 8.4" |
| December | 35°F | 45°F | 39°F | 11.5" |
| Index | Stevenson | Washington | National |
| Air quality index | 23 | 36 | 42 |
| Pollution index | 714,613 | 4,541,850 | 2,726,193 |
| Measurement | Total |
| Days measured | 350 |
| Days with good air quality | 298 |
| Days with moderate air quality | 52 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Parkdale, OR | 308 | 23 | 54.0% |
| Cascade Locks, OR | 1,509 | 23 | 54.0% |
| Carson, WA | 2,800 | 23 | 54.0% |
| North Bonneville, WA | 995 | 38 | 24.0% |
| Stevenson, WA | 1,414 | 23 | 54.0% |
| City | Population | Air Quality Index | National Avg. |
| Tuolumne City, CA | 1,414 | 39 | 22.0% |
| Bridgeport, NE | 1,414 | 19 | 62.0% |
| Niverville, NY | 1,414 | 37 | 26.0% |
| Saint-Tite-des-Caps, QC | 1,414 | n/a | |
| Chualar, CA | 1,413 | 37 | 26.0% |
| Stevenson, WA | 1,414 | 23 | 54.0% |
Here are the best places to live in Washington
Top 10 cities in Washington with the best education system
10 Best cities in Washington for employment
Top 10 best public schools in Stevenson