| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 16°F | 33°F | 24°F | 2.6" |
| February | 16°F | 34°F | 25°F | 1.7" |
| March | 25°F | 47°F | 35°F | 2.4" |
| April | 35°F | 62°F | 48°F | 3.5" |
| May | 46°F | 72°F | 59°F | 3.9" |
| June | 56°F | 81°F | 69°F | 4.5" |
| July | 60°F | 85°F | 72°F | 3.5" |
| August | 58°F | 83°F | 70°F | 4.4" |
| September | 51°F | 76°F | 63°F | 3.0" |
| October | 41°F | 63°F | 51°F | 3.7" |
| November | 31°F | 50°F | 40°F | 2.6" |
| December | 22°F | 37°F | 29°F | 2.3" |
| Index | Holt | Michigan | National |
| Air quality index | 36 | 69 | 42 |
| Pollution index | 8,357,230 | 4,161,606 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 330 |
| Days with moderate air quality | 35 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.070% |
| Benzene | 0.070% |
| Carbon Tetrachloride | 0.020% |
| Lead | 0.090% |
| Mercury | 0.120% |
| City | Population | Air Quality Index | National Avg. |
| Leslie, MI | 2,178 | 36 | 28.0% |
| Dansville, MI | 609 | 36 | 28.0% |
| East Lansing, MI | 48,437 | 36 | 28.0% |
| Lansing, MI | 117,488 | 36 | 28.0% |
| Williamston, MI | 3,939 | 36 | 28.0% |
| Holt, MI | 25,888 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Sachse, TX | 25,888 | 51 | 2.0% |
| Prosper, TX | 25,887 | 51 | 2.0% |
| Columbine, CO | 25,892 | 58 | 16.0% |
| Asheboro, NC | 25,877 | 40 | 20.0% |
| East Gwillimbury, ON | 25,899 | n/a | |
| Holt, MI | 25,888 | 36 | 28.0% |
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