Pioneer, Ohio has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4 °C (low) to 15.1 °C (high). Annual precipitation averages 945.9 Millimeters. Pioneer 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 | -8.6 °C | -0.2 °C | 61.21 mm |
| February | -7.8 °C | 1.6 °C | 52.07 mm |
| March | -3.2 °C | 7.4 °C | 62.74 mm |
| April | 2.6 °C | 14.9 °C | 88.39 mm |
| May | 9.1 °C | 21.3 °C | 107.7 mm |
| June | 14.6 °C | 26.7 °C | 96.52 mm |
| July | 16.3 °C | 28.8 °C | 91.19 mm |
| August | 15.2 °C | 27.6 °C | 97.54 mm |
| September | 10.9 °C | 24.2 °C | 80.01 mm |
| October | 4.8 °C | 16.9 °C | 72.64 mm |
| November | -0.7 °C | 9.1 °C | 76.2 mm |
| December | -5.2 °C | 2.5 °C | 59.69 mm |
| Annual | 4 °C | 15.1 °C | 945.9 mm |
| 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 : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |