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				| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation | 
| January | 10°F | 25°F | 17°F | 0.5" | 
| February | 12°F | 27°F | 19°F | 0.7" | 
| March | 26°F | 42°F | 33°F | 1.9" | 
| April | 38°F | 57°F | 46°F | 3.6" | 
| May | 49°F | 69°F | 58°F | 4.3" | 
| June | 59°F | 78°F | 67°F | 4.7" | 
| July | 62°F | 81°F | 71°F | 2.9" | 
| August | 60°F | 79°F | 69°F | 2.9" | 
| September | 53°F | 73°F | 62°F | 4.0" | 
| October | 41°F | 60°F | 49°F | 3.1" | 
| November | 29°F | 45°F | 36°F | 1.4" | 
| December | 16°F | 29°F | 22°F | 1.4" | 
| Index | Spring Valley | Minnesota | National | 
| Air quality index | 36 | 35 | 42 | 
| Pollution index | 904,857 | 1,854,519 | 2,726,193 | 
| Measurement | Total | 
| Days measured | 364 | 
| Days with good air quality | 313 | 
| Days with moderate air quality | 51 | 
| Days w/ poor A.Q. for sensitive groups | 0 | 
| Days with unhealthy air quality | 0 | 
| Pollutant | Total | 
| Arsenic | 0.001% | 
| Benzene | 0.030% | 
| Carbon Tetrachloride | 0.001% | 
| Lead | 0.002% | 
| Mercury | 0.000% | 
| City | Population | Air Quality Index | National Avg. | 
| Fountain, MN | 487 | 36 | 28.0% | 
| Stewartville, MN | 6,123 | 36 | 28.0% | 
| Chatfield, MN | 2,690 | 36 | 28.0% | 
| Chester, IA | 151 | 36 | 28.0% | 
| Grand Meadow, MN | 1,095 | 36 | 28.0% | 
| Spring Valley, MN | 2,395 | 36 | 28.0% | 
| City | Population | Air Quality Index | National Avg. | 
| Port Allegany, PA | 2,395 | 35 | 30.0% | 
| Ninety Six, SC | 2,395 | 31 | 38.0% | 
| Barton Creek, TX | 2,395 | 44 | 12.0% | 
| Parkwood, CA | 2,394 | 50 | = 100 | 
| Ponder, TX | 2,394 | 51 | 2.0% | 
| Spring Valley, MN | 2,395 | 36 | 28.0% |