Franklin, Vermont has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 34.2 °F (low) to 53.5 °F (high). Annual precipitation averages 43.9 Inches. Franklin is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 6.8 °F | 25.3 °F | 2.91 in. |
| February | 8.8 °F | 28.0 °F | 2.29 in. |
| March | 18.8 °F | 37.5 °F | 2.86 in. |
| April | 32.1 °F | 52.1 °F | 3.39 in. |
| May | 44.2 °F | 66.1 °F | 3.82 in. |
| June | 53.4 °F | 74.5 °F | 4.39 in. |
| July | 58.2 °F | 78.5 °F | 4.72 in. |
| August | 56.4 °F | 77.3 °F | 4.49 in. |
| September | 49.1 °F | 69.9 °F | 4.06 in. |
| October | 38.6 °F | 56.7 °F | 4.28 in. |
| November | 28.2 °F | 44.0 °F | 3.28 in. |
| December | 15.9 °F | 31.8 °F | 3.41 in. |
| Annual | 34.2 °F | 53.5 °F | 43.9 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |