| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 20°F | 33°F | 27°F | 1.2" |
| February | 22°F | 34°F | 28°F | 1.3" |
| March | 30°F | 48°F | 38°F | 5.9" |
| April | 38°F | 58°F | 47°F | 5.4" |
| May | 52°F | 72°F | 61°F | 4.9" |
| June | 59°F | 80°F | 69°F | 6.0" |
| July | 65°F | 87°F | 76°F | 6.0" |
| August | 61°F | 82°F | 71°F | 7.8" |
| September | 52°F | 72°F | 61°F | 6.1" |
| October | 42°F | 63°F | 51°F | 3.5" |
| November | 33°F | 50°F | 41°F | 4.7" |
| December | 26°F | 36°F | 31°F | 2.5" |
| Index | Greenville | Michigan | National |
| Air quality index | 38 | 69 | 42 |
| Pollution index | 1,401,450 | 4,161,606 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 298 |
| Days with moderate air quality | 67 |
| 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 | 0.005% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| McBride, MI | 155 | 38 | 24.0% |
| Sheridan, MI | 825 | 38 | 24.0% |
| Belding, MI | 5,729 | 38 | 24.0% |
| Stanton, MI | 1,354 | 38 | 24.0% |
| Cedar Springs, MI | 3,703 | 38 | 24.0% |
| Greenville, MI | 8,407 | 38 | 24.0% |
| City | Population | Air Quality Index | National Avg. |
| Socorro, NM | 8,406 | 53 | 6.0% |
| Spring Valley Lake, CA | 8,408 | 89 | 78.0% |
| Arab, AL | 8,405 | 44 | 12.0% |
| Cape St. Claire, MD | 8,405 | 46 | 8.0% |
| Salem, UT | 8,403 | 46 | 8.0% |
| Greenville, MI | 8,407 | 38 | 24.0% |
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