Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
January | 18°F | 40°F | 27°F | 1.2" |
February | 18°F | 40°F | 27°F | 1.3" |
March | 31°F | 56°F | 41°F | 1.7" |
April | 35°F | 58°F | 45°F | 11.2" |
May | 46°F | 69°F | 56°F | 12.4" |
June | 57°F | 81°F | 68°F | 3.1" |
July | 65°F | 93°F | 78°F | 3.2" |
August | 61°F | 87°F | 73°F | 5.4" |
September | 51°F | 81°F | 64°F | 1.4" |
October | 40°F | 64°F | 50°F | 36.4" |
November | 29°F | 51°F | 39°F | 3.7" |
December | 17°F | 35°F | 24°F | 1.5" |
Index | Rapid Valley | South Dakota | National |
Air quality index | 44 | 36 | 42 |
Pollution index | 551,228 | 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 | 0.000% |
Benzene | 0.010% |
Carbon Tetrachloride | 0.002% |
Lead | 0.000% |
Mercury | 0.000% |
City | Population | Air Quality Index | National Avg. |
Summerset, SD | 2,607 | 44 | 12.0% |
Box Elder, SD | 9,937 | 44 | 12.0% |
Keystone, SD | 542 | 44 | 12.0% |
New Underwood, SD | 758 | 44 | 12.0% |
Caputa, SD | 0 | 44 | 12.0% |
Rapid Valley, SD | 8,553 | 44 | 12.0% |
City | Population | Air Quality Index | National Avg. |
Hornsby Bend, TX | 8,553 | 44 | 12.0% |
Closter, NJ | 8,551 | 51 | 2.0% |
East Grand Forks, MN | 8,555 | 33 | 34.0% |
Frostburg, MD | 8,550 | 36 | 28.0% |
Boischatel, QC | 8,556 | n/a | |
Rapid Valley, SD | 8,553 | 44 | 12.0% |