Stamford, Vermont has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 34.6 °F (low) to 55.5 °F (high). Annual precipitation averages 50.8 Inches. Stamford is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 12.0 °F | 30.5 °F | 3.33 in. |
| February | 12.5 °F | 32.9 °F | 2.86 in. |
| March | 20.8 °F | 41.0 °F | 3.43 in. |
| April | 32.1 °F | 54.1 °F | 4.06 in. |
| May | 42.9 °F | 66.1 °F | 4.33 in. |
| June | 51.9 °F | 74.6 °F | 4.88 in. |
| July | 56.7 °F | 79.1 °F | 5.4 in. |
| August | 55.1 °F | 77.4 °F | 4.74 in. |
| September | 47.5 °F | 70.6 °F | 5.22 in. |
| October | 36.9 °F | 58.0 °F | 4.94 in. |
| November | 27.9 °F | 46.2 °F | 3.67 in. |
| December | 18.8 °F | 35.5 °F | 3.92 in. |
| Annual | 34.6 °F | 55.5 °F | 50.78 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°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 |