Portage Lakes, Ohio has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 41.5 °F (low) to 59.7 °F (high). Annual precipitation averages 39.1 Inches. Portage Lakes 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 | 19.7 °F | 33.9 °F | 2.78 in. |
| February | 20.9 °F | 36.7 °F | 2.16 in. |
| March | 28.5 °F | 46.2 °F | 3.07 in. |
| April | 39.5 °F | 59.8 °F | 3.59 in. |
| May | 50.0 °F | 70.4 °F | 3.83 in. |
| June | 59.0 °F | 79.0 °F | 4.07 in. |
| July | 62.7 °F | 82.9 °F | 3.85 in. |
| August | 61.0 °F | 81.4 °F | 3.53 in. |
| September | 53.9 °F | 74.9 °F | 3.29 in. |
| October | 43.3 °F | 62.4 °F | 3.21 in. |
| November | 33.7 °F | 49.7 °F | 2.94 in. |
| December | 25.7 °F | 38.6 °F | 2.82 in. |
| Annual | 41.5 °F | 59.7 °F | 39.14 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 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |