| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 9°F | 25°F | 16°F | 0.5" |
| February | 11°F | 28°F | 19°F | 0.8" |
| March | 26°F | 44°F | 34°F | 1.5" |
| April | 39°F | 59°F | 48°F | 4.1" |
| May | 50°F | 72°F | 60°F | 4.4" |
| June | 60°F | 81°F | 70°F | 5.8" |
| July | 65°F | 85°F | 75°F | 4.8" |
| August | 62°F | 82°F | 72°F | 6.0" |
| September | 55°F | 75°F | 64°F | 3.1" |
| October | 42°F | 60°F | 50°F | 3.1" |
| November | 29°F | 46°F | 36°F | 1.3" |
| December | 14°F | 28°F | 21°F | 1.3" |
| Index | Long Lake | Minnesota | National |
| Air quality index | 46 | 35 | 42 |
| Pollution index | 166,775 | 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 | 0.002% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Buffalo, MN | 16,413 | 32 | 36.0% |
| Coon Rapids, MN | 62,706 | 46 | 8.0% |
| Delano, MN | 6,167 | 46 | 8.0% |
| Maple Plain, MN | 1,737 | 46 | 8.0% |
| Mound, MN | 9,498 | 46 | 8.0% |
| Long Lake, MN | 1,779 | 46 | 8.0% |
| City | Population | Air Quality Index | National Avg. |
| Delaware City, DE | 1,779 | 42 | 16.0% |
| Zeigler, IL | 1,779 | 43 | 14.0% |
| Lake Dalecarlia, IN | 1,779 | 37 | 26.0% |
| Oologah, OK | 1,779 | 45 | 10.0% |
| Warfield, BC | 1,779 | n/a | |
| Long Lake, MN | 1,779 | 46 | 8.0% |
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