| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 28°F | 39°F | 31°F | 4.9" |
| February | 31°F | 46°F | 35°F | 3.9" |
| March | 34°F | 55°F | 41°F | 5.4" |
| April | 38°F | 64°F | 47°F | 4.3" |
| May | 44°F | 74°F | 55°F | 3.1" |
| June | 50°F | 82°F | 62°F | 3.2" |
| July | 56°F | 94°F | 70°F | 0.6" |
| August | 54°F | 92°F | 68°F | 1.0" |
| September | 48°F | 79°F | 59°F | 1.3" |
| October | 41°F | 62°F | 48°F | 3.7" |
| November | 34°F | 47°F | 38°F | 5.1" |
| December | 28°F | 38°F | 31°F | 5.2" |
| Index | Weippe | Idaho | National |
| Air quality index | 29 | 32 | 42 |
| Pollution index | 3,385,410 | 2,063,710 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 291 |
| Days with moderate air quality | 73 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.030% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.020% |
| Lead | 0.040% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Kamiah, ID | 1,334 | 29 | 42.0% |
| Nezperce, ID | 528 | 29 | 42.0% |
| Pierce, ID | 384 | 29 | 42.0% |
| Weippe, ID | 298 | 29 | 42.0% |
| City | Population | Air Quality Index | National Avg. |
| Akiak, AK | 298 | 31 | 38.0% |
| Goose Lake, IA | 298 | 42 | 16.0% |
| Taylor, MS | 298 | 33 | 34.0% |
| Toccopola, MS | 298 | 39 | 22.0% |
| Roberts, MT | 298 | 21 | 58.0% |
| Weippe, ID | 298 | 29 | 42.0% |
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