Forest, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.8 °F (low) to 59.8 °F (high). Annual precipitation averages 39 Inches. Forest 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 | 18.9 °F | 33.1 °F | 2.65 in. |
| February | 20.5 °F | 36.1 °F | 2.13 in. |
| March | 29.0 °F | 46.6 °F | 2.67 in. |
| April | 39.6 °F | 59.8 °F | 3.78 in. |
| May | 51.0 °F | 70.9 °F | 4.14 in. |
| June | 60.6 °F | 79.7 °F | 4.42 in. |
| July | 63.7 °F | 83.3 °F | 4.21 in. |
| August | 61.9 °F | 81.6 °F | 3.55 in. |
| September | 54.7 °F | 75.8 °F | 3.14 in. |
| October | 43.6 °F | 63.2 °F | 2.81 in. |
| November | 33.4 °F | 49.8 °F | 2.81 in. |
| December | 24.9 °F | 38.2 °F | 2.67 in. |
| Annual | 41.8 °F | 59.8 °F | 38.98 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 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 |