| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 4°F | 22°F | 13°F | 1.1" |
| February | 6°F | 25°F | 15°F | 3.4" |
| March | 20°F | 39°F | 28°F | 3.6" |
| April | 33°F | 53°F | 42°F | 3.5" |
| May | 44°F | 67°F | 55°F | 9.2" |
| June | 55°F | 77°F | 66°F | 9.6" |
| July | 58°F | 81°F | 69°F | 7.8" |
| August | 56°F | 78°F | 67°F | 10.6" |
| September | 51°F | 74°F | 62°F | 4.7" |
| October | 37°F | 58°F | 47°F | 5.4" |
| November | 23°F | 42°F | 32°F | 5.0" |
| December | 10°F | 25°F | 17°F | 1.9" |
| Index | Richmond | Minnesota | National |
| Air quality index | 32 | 35 | 42 |
| Pollution index | 1,174,010 | 1,854,519 | 2,726,193 |
| Measurement | Total |
| Days measured | 344 |
| Days with good air quality | 313 |
| Days with moderate air quality | 31 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.001% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Freeport, MN | 855 | 32 | 36.0% |
| St. Martin, MN | 356 | 32 | 36.0% |
| Rockville, MN | 2,571 | 32 | 36.0% |
| Waite Park, MN | 7,719 | 32 | 36.0% |
| Eden Valley, MN | 1,017 | 32 | 36.0% |
| Richmond, MN | 1,384 | 32 | 36.0% |
| City | Population | Air Quality Index | National Avg. |
| Gridley, IL | 1,384 | 44 | 12.0% |
| Warner, OK | 1,384 | 5 | 90.0% |
| Coburg, OR | 1,384 | 38 | 24.0% |
| Highfill, AR | 1,383 | 44 | 12.0% |
| Ladera, CA | 1,385 | 43 | 14.0% |
| Richmond, MN | 1,384 | 32 | 36.0% |
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