Massillon, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.2 °C (low) to 16 °C (high). Annual precipitation averages 1031.5 Millimeters. Massillon is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.7 °C | 1.6 °C | 78.23 mm |
| February | -6 °C | 3.2 °C | 59.18 mm |
| March | -1.8 °C | 8.6 °C | 81.53 mm |
| April | 4 °C | 16.3 °C | 90.93 mm |
| May | 10 °C | 22.1 °C | 100.58 mm |
| June | 14.7 °C | 26.6 °C | 113.54 mm |
| July | 17 °C | 28.5 °C | 105.66 mm |
| August | 16 °C | 28 °C | 93.22 mm |
| September | 12 °C | 24.6 °C | 83.82 mm |
| October | 5.9 °C | 17.8 °C | 78.99 mm |
| November | 0.6 °C | 10.4 °C | 73.66 mm |
| December | -3.5 °C | 4.2 °C | 72.14 mm |
| Annual | 5.2 °C | 16 °C | 1031.48 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 |