Berlin, Ohio has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 41.9 °F (low) to 59.5 °F (high). Annual precipitation averages 41.3 Inches. Berlin is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 19.3 °F | 33.9 °F | 2.99 in. |
| February | 20.7 °F | 36.9 °F | 2.27 in. |
| March | 28.9 °F | 46.7 °F | 3.22 in. |
| April | 40.4 °F | 59.9 °F | 3.82 in. |
| May | 50.8 °F | 70.0 °F | 4.1 in. |
| June | 60.0 °F | 78.7 °F | 4.88 in. |
| July | 63.3 °F | 81.7 °F | 4.13 in. |
| August | 61.6 °F | 80.5 °F | 3.65 in. |
| September | 54.8 °F | 74.6 °F | 3.24 in. |
| October | 43.8 °F | 62.3 °F | 3.14 in. |
| November | 34.0 °F | 49.8 °F | 2.92 in. |
| December | 25.5 °F | 38.7 °F | 2.96 in. |
| Annual | 41.9 °F | 59.5 °F | 41.32 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| 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 | Dfb - Humid Continental Mild Summer, Wet All Year |