Dudley, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.8 °C (low) to 14.8 °C (high). Annual precipitation averages 1270.8 Millimeters. Dudley 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.4 °C | 1.6 °C | 97.54 mm |
| February | -7.8 °C | 2.9 °C | 83.31 mm |
| March | -3.6 °C | 7.2 °C | 113.28 mm |
| April | 2.1 °C | 14.1 °C | 112.78 mm |
| May | 7.8 °C | 20.1 °C | 91.44 mm |
| June | 13 °C | 24.5 °C | 110.24 mm |
| July | 16.3 °C | 27.4 °C | 101.35 mm |
| August | 15.3 °C | 26.4 °C | 110.24 mm |
| September | 11.3 °C | 22.6 °C | 109.22 mm |
| October | 5.1 °C | 16 °C | 126.49 mm |
| November | -0.3 °C | 10.1 °C | 98.3 mm |
| December | -4.9 °C | 4.4 °C | 116.59 mm |
| Annual | 3.8 °C | 14.8 °C | 1270.78 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 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 | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |