Fairport Harbor, Ohio has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 43.8 °F (low) to 58.1 °F (high). Annual precipitation averages 40.9 Inches. Fairport Harbor is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 22.0 °F | 34.9 °F | 3.07 in. |
| February | 22.4 °F | 36.1 °F | 2.16 in. |
| March | 28.6 °F | 43.3 °F | 2.84 in. |
| April | 39.6 °F | 56.1 °F | 3.62 in. |
| May | 51.0 °F | 66.8 °F | 3.46 in. |
| June | 61.0 °F | 75.8 °F | 3.55 in. |
| July | 65.7 °F | 79.7 °F | 4.2 in. |
| August | 64.6 °F | 78.8 °F | 3.59 in. |
| September | 57.9 °F | 73.3 °F | 3.98 in. |
| October | 47.4 °F | 62.0 °F | 4.03 in. |
| November | 37.4 °F | 50.4 °F | 3.35 in. |
| December | 28.5 °F | 39.8 °F | 3.08 in. |
| Annual | 43.8 °F | 58.1 °F | 40.93 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°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 |