Geneva-on-the-Lake, Ohio has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 42.8 °F (low) to 56.9 °F (high). Annual precipitation averages 41 Inches. Geneva-on-the-Lake is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 21.1 °F | 34.3 °F | 3.0 in. |
| February | 21.2 °F | 35.2 °F | 2.14 in. |
| March | 27.8 °F | 41.9 °F | 2.68 in. |
| April | 39.0 °F | 54.7 °F | 3.68 in. |
| May | 50.2 °F | 65.4 °F | 3.39 in. |
| June | 59.8 °F | 74.1 °F | 3.63 in. |
| July | 64.4 °F | 78.2 °F | 3.97 in. |
| August | 63.4 °F | 77.2 °F | 3.57 in. |
| September | 56.5 °F | 71.6 °F | 4.14 in. |
| October | 46.2 °F | 60.7 °F | 4.06 in. |
| November | 36.4 °F | 49.7 °F | 3.46 in. |
| December | 28.0 °F | 39.3 °F | 3.28 in. |
| Annual | 42.8 °F | 56.9 °F | 41 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |