| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 20°F | 31°F | 26°F | 3.6" |
| February | 19°F | 31°F | 25°F | 1.9" |
| March | 26°F | 42°F | 34°F | 3.5" |
| April | 35°F | 55°F | 44°F | 4.5" |
| May | 45°F | 67°F | 56°F | 4.4" |
| June | 54°F | 75°F | 64°F | 4.9" |
| July | 59°F | 78°F | 69°F | 5.5" |
| August | 58°F | 77°F | 68°F | 4.2" |
| September | 51°F | 71°F | 61°F | 4.2" |
| October | 42°F | 59°F | 50°F | 6.1" |
| November | 33°F | 47°F | 40°F | 4.3" |
| December | 25°F | 35°F | 30°F | 3.5" |
| Index | Ludington | Michigan | National |
| Air quality index | 38 | 69 | 42 |
| Pollution index | 2,391,480 | 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 | 0.110% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.030% |
| Mercury | 0.040% |
| City | Population | Air Quality Index | National Avg. |
| Fountain, MI | 216 | 36 | 28.0% |
| Free Soil, MI | 99 | 36 | 28.0% |
| Scottville, MI | 1,290 | 36 | 28.0% |
| Custer, MI | 294 | 36 | 28.0% |
| Pentwater, MI | 797 | 38 | 24.0% |
| Ludington, MI | 8,081 | 38 | 24.0% |
| City | Population | Air Quality Index | National Avg. |
| Ephrata, WA | 8,081 | 18 | 64.0% |
| Larkfield-Wikiup, CA | 8,080 | 34 | 32.0% |
| Bloomingdale, NJ | 8,080 | 51 | 2.0% |
| Bel Aire, KS | 8,082 | 40 | 20.0% |
| Menominee, MI | 8,079 | 36 | 28.0% |
| Ludington, MI | 8,081 | 38 | 24.0% |
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