Whately, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.8 °F (low) to 58.7 °F (high). Annual precipitation averages 49.2 Inches. 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 | 13.4 °F | 32.8 °F | 3.48 in. |
| February | 14.5 °F | 36.0 °F | 3.14 in. |
| March | 23.6 °F | 44.5 °F | 3.79 in. |
| April | 34.3 °F | 57.9 °F | 3.97 in. |
| May | 45.0 °F | 69.3 °F | 3.81 in. |
| June | 54.6 °F | 77.8 °F | 4.68 in. |
| July | 60.1 °F | 83.0 °F | 4.22 in. |
| August | 58.0 °F | 81.2 °F | 4.39 in. |
| September | 50.1 °F | 74.1 °F | 4.7 in. |
| October | 38.6 °F | 60.9 °F | 5.04 in. |
| November | 29.1 °F | 48.8 °F | 3.69 in. |
| December | 20.6 °F | 38.2 °F | 4.3 in. |
| Annual | 36.8 °F | 58.7 °F | 49.21 in. |
| 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 : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |