Whately, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.7 °C (low) to 14.8 °C (high). Annual precipitation averages 1250 Millimeters. Whately is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.3 °C | 0.4 °C | 88.39 mm |
| February | -9.7 °C | 2.2 °C | 79.76 mm |
| March | -4.7 °C | 6.9 °C | 96.27 mm |
| April | 1.3 °C | 14.4 °C | 100.84 mm |
| May | 7.2 °C | 20.7 °C | 96.77 mm |
| June | 12.6 °C | 25.4 °C | 118.87 mm |
| July | 15.6 °C | 28.3 °C | 107.19 mm |
| August | 14.4 °C | 27.3 °C | 111.51 mm |
| September | 10.1 °C | 23.4 °C | 119.38 mm |
| October | 3.7 °C | 16.1 °C | 128.02 mm |
| November | -1.6 °C | 9.3 °C | 93.73 mm |
| December | -6.3 °C | 3.4 °C | 109.22 mm |
| Annual | 2.7 °C | 14.8 °C | 1249.95 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| 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 | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |