South Burlington, Vermont has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.6 °F (low) to 55.3 °F (high). Annual precipitation averages 40.2 Inches. South Burlington is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 9.8 °F | 27.6 °F | 2.38 in. |
| February | 11.5 °F | 30.5 °F | 1.88 in. |
| March | 21.1 °F | 39.3 °F | 2.54 in. |
| April | 34.2 °F | 53.9 °F | 3.26 in. |
| May | 46.2 °F | 67.4 °F | 3.47 in. |
| June | 55.8 °F | 76.0 °F | 4.31 in. |
| July | 60.9 °F | 80.7 °F | 4.52 in. |
| August | 59.2 °F | 79.3 °F | 4.08 in. |
| September | 51.3 °F | 71.5 °F | 3.94 in. |
| October | 40.2 °F | 57.9 °F | 4.03 in. |
| November | 30.1 °F | 45.6 °F | 2.97 in. |
| December | 18.8 °F | 34.0 °F | 2.84 in. |
| Annual | 36.6 °F | 55.3 °F | 40.22 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 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 |