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| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 8°F | 26°F | 17°F | 0.6" |
| February | 11°F | 30°F | 19°F | 1.1" |
| March | 25°F | 44°F | 33°F | 3.2" |
| April | 35°F | 58°F | 46°F | 3.1" |
| May | 48°F | 71°F | 59°F | 5.0" |
| June | 58°F | 80°F | 69°F | 6.7" |
| July | 62°F | 86°F | 74°F | 5.7" |
| August | 60°F | 82°F | 70°F | 7.1" |
| September | 52°F | 77°F | 63°F | 6.5" |
| October | 40°F | 61°F | 50°F | 5.0" |
| November | 27°F | 47°F | 36°F | 3.1" |
| December | 13°F | 29°F | 21°F | 1.8" |
| Index | Revillo | South Dakota | National |
| Air quality index | 25 | 36 | 42 |
| Pollution index | 358,608 | 345,623 | 2,726,193 |
| Measurement | Total |
| Days measured | 361 |
| Days with good air quality | 325 |
| Days with moderate air quality | 36 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.002% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Bellingham, MN | 266 | 25 | 50.0% |
| Goodwin, SD | 102 | 25 | 50.0% |
| Twin Brooks, SD | 44 | 25 | 50.0% |
| Marietta, MN | 167 | 25 | 50.0% |
| La Bolt, SD | 99 | 25 | 50.0% |
| Revillo, SD | 115 | 25 | 50.0% |
| City | Population | Air Quality Index | National Avg. |
| Nikolai, AK | 115 | 31 | 38.0% |
| Onycha, AL | 115 | 35 | 30.0% |
| Staves, AR | 115 | 32 | 36.0% |
| Wet Camp Village, AZ | 115 | 74 | 48.0% |
| Mettler, CA | 115 | 67 | 34.0% |
| Revillo, SD | 115 | 25 | 50.0% |
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