Marne, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.2 °F (low) to 61.9 °F (high). Annual precipitation averages 42.1 Inches. Marne 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 | 19.9 °F | 36.4 °F | 3.21 in. |
| February | 21.6 °F | 39.6 °F | 2.5 in. |
| March | 29.3 °F | 49.7 °F | 3.52 in. |
| April | 39.5 °F | 62.9 °F | 3.95 in. |
| May | 49.9 °F | 72.6 °F | 4.11 in. |
| June | 58.8 °F | 80.9 °F | 4.54 in. |
| July | 62.5 °F | 84.1 °F | 4.29 in. |
| August | 60.7 °F | 82.7 °F | 3.71 in. |
| September | 53.1 °F | 76.7 °F | 3.21 in. |
| October | 41.6 °F | 64.5 °F | 2.93 in. |
| November | 32.2 °F | 51.9 °F | 2.99 in. |
| December | 25.2 °F | 40.9 °F | 3.1 in. |
| Annual | 41.2 °F | 61.9 °F | 42.06 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 | Dfa - Humid Continental Hot Summers With Year Around Precipitation |