Marne, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.1 °C (low) to 16.6 °C (high). Annual precipitation averages 1068.3 Millimeters. 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 | -6.7 °C | 2.4 °C | 81.53 mm |
| February | -5.8 °C | 4.2 °C | 63.5 mm |
| March | -1.5 °C | 9.8 °C | 89.41 mm |
| April | 4.2 °C | 17.2 °C | 100.33 mm |
| May | 9.9 °C | 22.6 °C | 104.39 mm |
| June | 14.9 °C | 27.2 °C | 115.32 mm |
| July | 16.9 °C | 28.9 °C | 108.97 mm |
| August | 15.9 °C | 28.2 °C | 94.23 mm |
| September | 11.7 °C | 24.8 °C | 81.53 mm |
| October | 5.3 °C | 18.1 °C | 74.42 mm |
| November | 0.1 °C | 11.1 °C | 75.95 mm |
| December | -3.8 °C | 4.9 °C | 78.74 mm |
| Annual | 5.1 °C | 16.6 °C | 1068.32 mm |
| 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 : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |