| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 34°F | 48°F | 40°F | 4.4" |
| February | 34°F | 53°F | 43°F | 4.3" |
| March | 39°F | 60°F | 48°F | 3.8" |
| April | 40°F | 62°F | 50°F | 2.8" |
| May | 45°F | 70°F | 57°F | 3.3" |
| June | 48°F | 73°F | 60°F | 2.8" |
| July | 53°F | 85°F | 69°F | 1.2" |
| August | 51°F | 86°F | 67°F | 3.2" |
| September | 46°F | 77°F | 61°F | 3.1" |
| October | 45°F | 63°F | 52°F | 4.0" |
| November | 36°F | 53°F | 43°F | 5.8" |
| December | 36°F | 47°F | 41°F | 10.4" |
| Index | Amity | Oregon | National |
| Air quality index | 32 | 32 | 42 |
| Pollution index | 3,182,180 | 7,156,356 | 2,726,193 |
| Measurement | Total |
| Days measured | 356 |
| Days with good air quality | 302 |
| Days with moderate air quality | 54 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.030% |
| Lead | 0.190% |
| Mercury | 0.110% |
| City | Population | Air Quality Index | National Avg. |
| Dallas, OR | 16,612 | 32 | 36.0% |
| Eola, OR | 0 | 32 | 36.0% |
| Willamina, OR | 2,425 | 32 | 36.0% |
| Brooks, OR | 621 | 32 | 36.0% |
| Labish Village, OR | 491 | 32 | 36.0% |
| Amity, OR | 1,557 | 32 | 36.0% |
| City | Population | Air Quality Index | National Avg. |
| Red Corral, CA | 1,557 | 39 | 22.0% |
| Peru, NY | 1,557 | 37 | 26.0% |
| Glenelg, NB | 1,557 | n/a | |
| Greenland, AR | 1,558 | 44 | 12.0% |
| Baldwin, FL | 1,556 | 43 | 14.0% |
| Amity, OR | 1,557 | 32 | 36.0% |
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