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 | St. Charles | 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. |
Butte, NE | 348 | 36 | 28.0% |
Burke, SD | 705 | 36 | 28.0% |
Naper, NE | 83 | 36 | 28.0% |
Herrick, SD | 66 | 36 | 28.0% |
Bonesteel, SD | 386 | 36 | 28.0% |
St. Charles, SD | 8 | 36 | 28.0% |
City | Population | Air Quality Index | National Avg. |
Platinum, AK | 8 | 31 | 38.0% |
Ugashik, AK | 8 | 31 | 38.0% |
Natural Bridge, AL | 8 | 41 | 18.0% |
Charco, AZ | 8 | 74 | 48.0% |
Mojave Ranch Estates, AZ | 8 | 13 | 74.0% |
St. Charles, SD | 8 | 36 | 28.0% |