| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 6°F | 23°F | 14°F | 1.0" |
| February | 7°F | 26°F | 16°F | 0.6" |
| March | 21°F | 42°F | 31°F | 3.9" |
| April | 35°F | 58°F | 46°F | 5.4" |
| May | 47°F | 69°F | 57°F | 3.3" |
| June | 59°F | 80°F | 69°F | 6.1" |
| July | 62°F | 85°F | 73°F | 3.5" |
| August | 57°F | 80°F | 68°F | 2.4" |
| September | 52°F | 73°F | 62°F | 6.3" |
| October | 42°F | 59°F | 50°F | 7.4" |
| November | 26°F | 41°F | 33°F | 2.3" |
| December | 8°F | 23°F | 16°F | 2.2" |
| Index | Brainerd | Minnesota | National |
| Air quality index | 29 | 35 | 42 |
| Pollution index | 3,117,800 | 1,854,519 | 2,726,193 |
| Measurement | Total |
| Days measured | 359 |
| Days with good air quality | 328 |
| Days with moderate air quality | 29 |
| Days w/ poor A.Q. for sensitive groups | 2 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.010% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.030% |
| Lead | 0.010% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| Ironton, MN | 505 | 29 | 42.0% |
| East Gull Lake, MN | 906 | 29 | 42.0% |
| Nisswa, MN | 1,742 | 29 | 42.0% |
| Crosby, MN | 2,780 | 29 | 42.0% |
| Riverton, MN | 205 | 29 | 42.0% |
| Brainerd, MN | 13,423 | 29 | 42.0% |
| City | Population | Air Quality Index | National Avg. |
| Beaufort, SC | 13,417 | 29 | 42.0% |
| Lyndhurst, OH | 13,431 | 50 | = 100 |
| Beach Park, IL | 13,433 | 39 | 22.0% |
| Whitehall, PA | 13,437 | 56 | 12.0% |
| Nesconset, NY | 13,440 | 43 | 14.0% |
| Brainerd, MN | 13,423 | 29 | 42.0% |
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