Wauseon, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 39.8 °F (low) to 59.5 °F (high). Annual precipitation averages 35.6 Inches. Wauseon is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.2 °F | 32.0 °F | 2.27 in. |
| February | 18.6 °F | 35.2 °F | 1.95 in. |
| March | 26.8 °F | 45.6 °F | 2.41 in. |
| April | 37.3 °F | 59.3 °F | 3.31 in. |
| May | 48.9 °F | 70.8 °F | 4.0 in. |
| June | 58.9 °F | 80.4 °F | 3.71 in. |
| July | 61.9 °F | 84.0 °F | 3.54 in. |
| August | 59.8 °F | 82.1 °F | 3.57 in. |
| September | 52.1 °F | 76.1 °F | 3.04 in. |
| October | 41.1 °F | 63.1 °F | 2.71 in. |
| November | 31.4 °F | 48.7 °F | 2.76 in. |
| December | 23.1 °F | 37.0 °F | 2.33 in. |
| Annual | 39.8 °F | 59.5 °F | 35.6 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |