| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 9°F | 25°F | 17°F | 0.5" |
| February | 11°F | 28°F | 19°F | 0.7" |
| March | 25°F | 44°F | 34°F | 1.4" |
| April | 37°F | 59°F | 47°F | 3.7" |
| May | 48°F | 71°F | 59°F | 4.5" |
| June | 59°F | 80°F | 69°F | 5.2" |
| July | 64°F | 85°F | 75°F | 4.5" |
| August | 61°F | 82°F | 71°F | 4.7" |
| September | 53°F | 75°F | 63°F | 3.1" |
| October | 40°F | 60°F | 49°F | 3.0" |
| November | 28°F | 45°F | 36°F | 1.4" |
| December | 14°F | 28°F | 21°F | 1.3" |
| Index | Hilltop | Minnesota | National |
| Air quality index | 46 | 35 | 42 |
| Pollution index | 409,264 | 1,854,519 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 214 |
| Days with moderate air quality | 148 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 1 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Arden Hills, MN | 10,276 | 46 | 8.0% |
| Mendota, MN | 149 | 46 | 8.0% |
| St. Paul, MN | 305,877 | 46 | 8.0% |
| Coon Rapids, MN | 62,706 | 46 | 8.0% |
| Richfield, MN | 36,253 | 46 | 8.0% |
| Hilltop, MN | 1,007 | 46 | 8.0% |
| City | Population | Air Quality Index | National Avg. |
| Franklin, GA | 1,007 | 52 | 4.0% |
| Naalehu, HI | 1,007 | 16 | 68.0% |
| Sidney, IA | 1,007 | 40 | 20.0% |
| Waynetown, IN | 1,007 | 42 | 16.0% |
| Arlington, SD | 1,007 | 42 | 16.0% |
| Hilltop, MN | 1,007 | 46 | 8.0% |
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