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| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 16°F | 37°F | 25°F | 0.2" |
| February | 16°F | 38°F | 26°F | 0.3" |
| March | 28°F | 53°F | 38°F | 0.7" |
| April | 37°F | 62°F | 48°F | 2.4" |
| May | 47°F | 72°F | 59°F | 3.5" |
| June | 58°F | 83°F | 70°F | 3.9" |
| July | 65°F | 92°F | 77°F | 1.9" |
| August | 62°F | 88°F | 74°F | 3.4" |
| September | 53°F | 80°F | 65°F | 1.8" |
| October | 41°F | 65°F | 51°F | 1.8" |
| November | 28°F | 52°F | 39°F | 0.3" |
| December | 16°F | 36°F | 25°F | 0.3" |
| Index | Dallas | South Dakota | National |
| Air quality index | 36 | 36 | 42 |
| Pollution index | 179,967 | 345,623 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 321 |
| Days with moderate air quality | 43 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.002% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Burke, SD | 705 | 36 | 28.0% |
| Gregory, SD | 1,444 | 36 | 28.0% |
| Colome, SD | 387 | 36 | 28.0% |
| Dallas, SD | 90 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Utting, AZ | 90 | 13 | 74.0% |
| C-Road, CA | 90 | 44 | 12.0% |
| Darwin, CA | 90 | 15 | 70.0% |
| Tarrytown, GA | 90 | 26 | 48.0% |
| Odin, KS | 90 | 40 | 20.0% |
| Dallas, SD | 90 | 36 | 28.0% |
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