Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 12°F | 40°F | 25°F | 0.3" |
February | 13°F | 43°F | 26°F | 0.5" |
March | 23°F | 55°F | 37°F | 0.8" |
April | 31°F | 61°F | 45°F | 2.1" |
May | 40°F | 70°F | 54°F | 3.5" |
June | 51°F | 82°F | 66°F | 3.2" |
July | 58°F | 92°F | 74°F | 1.8" |
August | 55°F | 89°F | 71°F | 2.2" |
September | 46°F | 81°F | 62°F | 1.3" |
October | 34°F | 65°F | 48°F | 1.2" |
November | 22°F | 53°F | 36°F | 0.5" |
December | 11°F | 38°F | 23°F | 0.6" |
Index | Green Valley | South Dakota | National |
Air quality index | 44 | 36 | 42 |
Pollution index | 1,968,790 | 345,623 | 2,726,193 |
Measurement | Total |
Days measured | 365 |
Days with good air quality | 274 |
Days with moderate air quality | 87 |
Days w/ poor A.Q. for sensitive groups | 4 |
Days with unhealthy air quality | 0 |
Pollutant | Total |
Arsenic | 0.003% |
Benzene | 0.030% |
Carbon Tetrachloride | 0.004% |
Lead | 0.020% |
Mercury | 0.010% |
City | Population | Air Quality Index | National Avg. |
Piedmont, SD | 1,188 | 44 | 12.0% |
Blackhawk, SD | 3,029 | 44 | 12.0% |
Hermosa, SD | 407 | 44 | 12.0% |
Summerset, SD | 2,607 | 44 | 12.0% |
Box Elder, SD | 9,937 | 44 | 12.0% |
Green Valley, SD | 1,252 | 44 | 12.0% |
City | Population | Air Quality Index | National Avg. |
Kotlik, AK | 1,252 | 31 | 38.0% |
Weissport East, PA | 1,252 | 42 | 16.0% |
Iraan, TX | 1,252 | 28 | 44.0% |
Shullsburg, WI | 1,252 | 29 | 42.0% |
Georgetown, CT | 1,251 | 43 | 14.0% |
Green Valley, SD | 1,252 | 44 | 12.0% |