| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 11°F | 27°F | 19°F | 1.4" |
| February | 13°F | 30°F | 21°F | 2.9" |
| March | 27°F | 44°F | 34°F | 3.1" |
| April | 38°F | 57°F | 46°F | 4.5" |
| May | 49°F | 70°F | 59°F | 8.1" |
| June | 60°F | 80°F | 69°F | 7.4" |
| July | 63°F | 82°F | 72°F | 6.6" |
| August | 61°F | 80°F | 70°F | 6.2" |
| September | 55°F | 75°F | 64°F | 5.2" |
| October | 42°F | 60°F | 50°F | 5.3" |
| November | 28°F | 45°F | 36°F | 2.3" |
| December | 18°F | 31°F | 24°F | 2.2" |
| Index | Hammond | Minnesota | National |
| Air quality index | 36 | 35 | 42 |
| Pollution index | 1,299,880 | 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 | 0.010% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Plainview, MN | 3,292 | 36 | 28.0% |
| Byron, MN | 5,536 | 36 | 28.0% |
| Pine Island, MN | 3,629 | 36 | 28.0% |
| Rochester, MN | 117,134 | 36 | 28.0% |
| Zumbro Falls, MN | 223 | 36 | 28.0% |
| Hammond, MN | 109 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Eagle, AK | 109 | 38 | 24.0% |
| Mud Bay, AK | 109 | 20 | 60.0% |
| Standing Rock, AL | 109 | 42 | 16.0% |
| Kohls Ranch, AZ | 109 | 60 | 20.0% |
| Vilas, CO | 109 | 20 | 60.0% |
| Hammond, MN | 109 | 36 | 28.0% |
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