Dalton, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.1 °C (low) to 14.9 °C (high). Annual precipitation averages 1134.9 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 | -9.1 °C | 0.8 °C | 77.72 mm |
| February | -8.5 °C | 2.2 °C | 61.47 mm |
| March | -4.1 °C | 6.9 °C | 82.3 mm |
| April | 1.6 °C | 14.6 °C | 95.5 mm |
| May | 7.4 °C | 20.9 °C | 99.06 mm |
| June | 12.6 °C | 25.4 °C | 121.67 mm |
| July | 15 °C | 27.9 °C | 113.03 mm |
| August | 14.1 °C | 26.9 °C | 108.71 mm |
| September | 10.1 °C | 23.1 °C | 107.19 mm |
| October | 4.1 °C | 16.2 °C | 107.7 mm |
| November | -1 °C | 9.7 °C | 76.96 mm |
| December | -5.4 °C | 3.6 °C | 83.57 mm |
| Annual | 3.1 °C | 14.9 °C | 1134.88 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 | Dfb - Humid Continental Mild Summer, Wet All Year |