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| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 6°F | 27°F | 15°F | 0.6" |
| February | 10°F | 31°F | 19°F | 0.9" |
| March | 27°F | 51°F | 36°F | 2.8" |
| April | 35°F | 60°F | 46°F | 3.6" |
| May | 47°F | 72°F | 58°F | 6.9" |
| June | 58°F | 81°F | 68°F | 3.9" |
| July | 63°F | 93°F | 76°F | 1.9" |
| August | 59°F | 88°F | 71°F | 6.5" |
| September | 52°F | 81°F | 63°F | 2.5" |
| October | 39°F | 64°F | 48°F | 4.8" |
| November | 24°F | 48°F | 34°F | 0.4" |
| December | 11°F | 31°F | 20°F | 1.9" |
| Index | McIntosh | South Dakota | National |
| Air quality index | 36 | 36 | 42 |
| Pollution index | 296,932 | 345,623 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 320 |
| Days with moderate air quality | 45 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.003% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Bullhead, SD | 296 | 36 | 28.0% |
| McIntosh, SD | 153 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Powhatan, AR | 153 | 45 | 10.0% |
| Hard Rock, AZ | 153 | 45 | 10.0% |
| Amador City, CA | 153 | 52 | 4.0% |
| Pine Flat, CA | 153 | 67 | 34.0% |
| Morriston, FL | 153 | 38 | 24.0% |
| McIntosh, SD | 153 | 36 | 28.0% |
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