East Palestine, Ohio has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.5 °C (low) to 16.2 °C (high). Annual precipitation averages 1040.6 Millimeters. East Palestine is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.1 °C | 2.1 °C | 77.22 mm |
| February | -6.6 °C | 3.7 °C | 59.18 mm |
| March | -2.4 °C | 8.9 °C | 79.25 mm |
| April | 3.2 °C | 16.4 °C | 95.25 mm |
| May | 8.8 °C | 22 °C | 98.04 mm |
| June | 13.8 °C | 26.6 °C | 109.73 mm |
| July | 16 °C | 28.7 °C | 108.2 mm |
| August | 15.2 °C | 28 °C | 89.15 mm |
| September | 11.4 °C | 24.5 °C | 94.23 mm |
| October | 5.4 °C | 17.6 °C | 79.5 mm |
| November | 0.3 °C | 10.6 °C | 73.91 mm |
| December | -3.8 °C | 4.7 °C | 76.96 mm |
| Annual | 4.5 °C | 16.2 °C | 1040.62 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| 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 | Dfb - Humid Continental Mild Summer, Wet All Year |