Weston, Vermont has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 31.8 °F (low) to 53.6 °F (high). Annual precipitation averages 52.3 Inches. Weston is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 8.7 °F | 28.5 °F | 3.71 in. |
| February | 8.4 °F | 31.0 °F | 3.22 in. |
| March | 17.1 °F | 39.0 °F | 4.12 in. |
| April | 29.4 °F | 51.9 °F | 4.19 in. |
| May | 41.4 °F | 64.7 °F | 4.37 in. |
| June | 50.3 °F | 72.4 °F | 5.28 in. |
| July | 54.6 °F | 77.3 °F | 4.64 in. |
| August | 52.6 °F | 75.6 °F | 4.41 in. |
| September | 44.3 °F | 69.4 °F | 4.26 in. |
| October | 34.4 °F | 56.0 °F | 5.49 in. |
| November | 25.0 °F | 44.5 °F | 4.08 in. |
| December | 15.9 °F | 33.4 °F | 4.54 in. |
| Annual | 31.8 °F | 53.6 °F | 52.31 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |