| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 19°F | 34°F | 26°F | 2.7" |
| February | 18°F | 34°F | 26°F | 2.1" |
| March | 25°F | 45°F | 35°F | 2.6" |
| April | 36°F | 59°F | 47°F | 3.7" |
| May | 46°F | 70°F | 58°F | 3.1" |
| June | 56°F | 79°F | 68°F | 3.8" |
| July | 60°F | 82°F | 72°F | 3.4" |
| August | 60°F | 81°F | 71°F | 3.0" |
| September | 53°F | 75°F | 64°F | 3.7" |
| October | 43°F | 62°F | 52°F | 4.4" |
| November | 33°F | 50°F | 42°F | 3.0" |
| December | 25°F | 38°F | 31°F | 2.8" |
| Index | Grant | Michigan | National |
| Air quality index | 38 | 69 | 42 |
| Pollution index | 1,927,350 | 4,161,606 | 2,726,193 |
| Measurement | Total |
| Days measured | 262 |
| Days with good air quality | 236 |
| Days with moderate air quality | 25 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.002% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Cedar Springs, MI | 3,703 | 38 | 24.0% |
| Sparta, MI | 4,390 | 38 | 24.0% |
| Fremont, MI | 4,030 | 38 | 24.0% |
| Kent City, MI | 1,173 | 38 | 24.0% |
| Newaygo, MI | 2,044 | 38 | 24.0% |
| Grant, MI | 1,110 | 38 | 24.0% |
| City | Population | Air Quality Index | National Avg. |
| Hotevilla-Bacavi, AZ | 1,110 | 45 | 10.0% |
| Black Diamond, FL | 1,110 | 30 | 40.0% |
| Percy, IL | 1,110 | 43 | 14.0% |
| Johnson City, KS | 1,110 | 15 | 70.0% |
| Algonquin, MD | 1,110 | 41 | 18.0% |
| Grant, MI | 1,110 | 38 | 24.0% |
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