New Holland, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.7 °C (low) to 16.8 °C (high). Annual precipitation averages 1041.9 Millimeters. New Holland is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.2 °C | 2.7 °C | 74.68 mm |
| February | -5.2 °C | 4.3 °C | 63.5 mm |
| March | -1 °C | 9.9 °C | 91.95 mm |
| April | 4.9 °C | 17.1 °C | 103.89 mm |
| May | 11 °C | 22.8 °C | 112.27 mm |
| June | 15.9 °C | 27.3 °C | 117.6 mm |
| July | 17.5 °C | 28.9 °C | 100.84 mm |
| August | 16.2 °C | 28.4 °C | 84.33 mm |
| September | 12.1 °C | 25.5 °C | 71.12 mm |
| October | 6.1 °C | 18.6 °C | 73.66 mm |
| November | 0.4 °C | 11.2 °C | 74.93 mm |
| December | -3.2 °C | 5.1 °C | 73.15 mm |
| Annual | 5.7 °C | 16.8 °C | 1041.92 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°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 |