Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 11°F | 30°F | 20°F | 0.2" |
February | 13°F | 34°F | 22°F | 0.4" |
March | 26°F | 49°F | 36°F | 0.8" |
April | 37°F | 62°F | 48°F | 2.2" |
May | 48°F | 73°F | 60°F | 3.6" |
June | 59°F | 83°F | 71°F | 3.3" |
July | 64°F | 89°F | 76°F | 2.9" |
August | 61°F | 84°F | 72°F | 3.2" |
September | 52°F | 78°F | 64°F | 1.9" |
October | 40°F | 64°F | 50°F | 2.2" |
November | 26°F | 49°F | 36°F | 0.4" |
December | 13°F | 32°F | 22°F | 0.5" |
Index | Ethan | South Dakota | National |
Air quality index | 36 | 36 | 42 |
Pollution index | 145,854 | 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. |
Alexandria, SD | 766 | 36 | 28.0% |
Milltown, SD | 25 | 36 | 28.0% |
Dimock, SD | 141 | 36 | 28.0% |
Mitchell, SD | 15,599 | 36 | 28.0% |
Farmer, SD | 34 | 36 | 28.0% |
Ethan, SD | 328 | 36 | 28.0% |
City | Population | Air Quality Index | National Avg. |
Saxman, AK | 328 | 20 | 60.0% |
Dillard, GA | 328 | 41 | 18.0% |
Fountain Run, KY | 328 | 43 | 14.0% |
Butlertown, MD | 328 | 46 | 8.0% |
Keytesville, MO | 328 | 38 | 24.0% |
Ethan, SD | 328 | 36 | 28.0% |