| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 22°F | 35°F | 28°F | 3.8" |
| February | 16°F | 30°F | 23°F | 1.6" |
| March | 28°F | 47°F | 36°F | 3.5" |
| April | 38°F | 60°F | 48°F | 6.2" |
| May | 49°F | 72°F | 60°F | 2.5" |
| June | 61°F | 84°F | 72°F | 4.9" |
| July | 63°F | 84°F | 73°F | 7.4" |
| August | 64°F | 84°F | 73°F | 8.9" |
| September | 56°F | 80°F | 67°F | 4.4" |
| October | 48°F | 67°F | 57°F | 2.8" |
| November | 33°F | 51°F | 42°F | 4.5" |
| December | 22°F | 34°F | 28°F | 4.2" |
| Index | Northwood | Ohio | National |
| Air quality index | 40 | 40 | 42 |
| Pollution index | 3,553,510 | 4,472,386 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 291 |
| Days with moderate air quality | 73 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.003% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.010% |
| Lead | 0.040% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Luna Pier, MI | 1,134 | 1 | 98.0% |
| Lambertville, MI | 9,970 | 40 | 20.0% |
| Sylvania, OH | 19,242 | 40 | 20.0% |
| Perrysburg, OH | 21,566 | 40 | 20.0% |
| Clay Center, OH | 400 | 40 | 20.0% |
| Northwood, OH | 5,420 | 40 | 20.0% |
| City | Population | Air Quality Index | National Avg. |
| Davenport, FL | 5,420 | 36 | 28.0% |
| Carrizo Springs, TX | 5,421 | 25 | 50.0% |
| Willow Creek No. 26, AB | 5,418 | n/a | |
| West Pleasant View, CO | 5,417 | 58 | 16.0% |
| Walterboro, SC | 5,417 | 29 | 42.0% |
| Northwood, OH | 5,420 | 40 | 20.0% |
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