| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 18°F | 33°F | 26°F | 2.1" |
| February | 18°F | 34°F | 26°F | 1.2" |
| March | 28°F | 48°F | 38°F | 2.1" |
| April | 38°F | 62°F | 49°F | 3.3" |
| May | 49°F | 73°F | 61°F | 3.9" |
| June | 58°F | 81°F | 70°F | 3.4" |
| July | 62°F | 84°F | 73°F | 4.0" |
| August | 60°F | 82°F | 71°F | 4.0" |
| September | 53°F | 76°F | 64°F | 3.6" |
| October | 43°F | 63°F | 52°F | 4.4" |
| November | 32°F | 50°F | 41°F | 2.2" |
| December | 24°F | 38°F | 31°F | 1.9" |
| Index | Richland | Michigan | National |
| Air quality index | 38 | 69 | 42 |
| Pollution index | 1,797,130 | 4,161,606 | 2,726,193 |
| Measurement | Total |
| Days measured | 362 |
| Days with good air quality | 312 |
| Days with moderate air quality | 50 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.002% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Springfield, MI | 5,188 | 38 | 24.0% |
| Galesburg, MI | 2,201 | 38 | 24.0% |
| South Gull Lake, MI | 1,615 | 38 | 24.0% |
| Portage, MI | 49,224 | 38 | 24.0% |
| Battle Creek, MI | 51,084 | 38 | 24.0% |
| Richland, MI | 877 | 38 | 24.0% |
| City | Population | Air Quality Index | National Avg. |
| Gallant, AL | 877 | 43 | 14.0% |
| Miner, MO | 877 | 44 | 12.0% |
| Scooba, MS | 877 | 36 | 28.0% |
| Vaughn, MT | 877 | 21 | 58.0% |
| Forest Home, NY | 877 | 34 | 32.0% |
| Richland, MI | 877 | 38 | 24.0% |
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