| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 20°F | 34°F | 27°F | 3.5" |
| February | 19°F | 32°F | 26°F | 2.0" |
| March | 27°F | 45°F | 36°F | 2.7" |
| April | 37°F | 60°F | 48°F | 4.7" |
| May | 48°F | 71°F | 59°F | 3.1" |
| June | 60°F | 83°F | 72°F | 2.9" |
| July | 60°F | 83°F | 72°F | 3.5" |
| August | 61°F | 82°F | 72°F | 5.8" |
| September | 54°F | 79°F | 66°F | 3.3" |
| October | 47°F | 66°F | 56°F | 4.2" |
| November | 33°F | 49°F | 41°F | 4.2" |
| December | 24°F | 34°F | 29°F | 2.2" |
| Index | Allendale | 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. |
| Comstock Park, MI | 10,659 | 38 | 24.0% |
| Grand Haven, MI | 10,991 | 38 | 24.0% |
| Spring Lake, MI | 2,477 | 38 | 24.0% |
| Fruitport, MI | 1,222 | 38 | 24.0% |
| Sparta, MI | 4,390 | 38 | 24.0% |
| Allendale, MI | 23,696 | 38 | 24.0% |
| City | Population | Air Quality Index | National Avg. |
| Pelham, AL | 23,707 | 53 | 6.0% |
| Edgewater, FL | 23,710 | 37 | 26.0% |
| Windsor, CO | 23,679 | 45 | 10.0% |
| Zion, IL | 23,677 | 39 | 22.0% |
| Newberg, OR | 23,676 | 38 | 24.0% |
| Allendale, MI | 23,696 | 38 | 24.0% |
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