Dalton, 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 15.5 °C (high). Annual precipitation averages 1021.3 Millimeters. Dalton 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7 °C | 1.2 °C | 71.63 mm |
| February | -6.4 °C | 2.8 °C | 54.1 mm |
| March | -1.9 °C | 8.2 °C | 77.22 mm |
| April | 4 °C | 15.7 °C | 94.23 mm |
| May | 9.8 °C | 21.4 °C | 103.12 mm |
| June | 14.9 °C | 26.2 °C | 113.03 mm |
| July | 16.9 °C | 28 °C | 98.81 mm |
| August | 15.9 °C | 27.3 °C | 95.76 mm |
| September | 12.1 °C | 23.9 °C | 87.38 mm |
| October | 5.9 °C | 17.1 °C | 82.55 mm |
| November | 0.6 °C | 10.1 °C | 72.64 mm |
| December | -3.8 °C | 3.8 °C | 70.87 mm |
| Annual | 5.1 °C | 15.5 °C | 1021.34 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| 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 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |