Roxbury, Vermont has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 31.8 °F (low) to 51.4 °F (high). Annual precipitation averages 46.2 Inches. Roxbury 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 | 7.0 °F | 24.6 °F | 3.18 in. |
| February | 7.8 °F | 27.7 °F | 2.72 in. |
| March | 16.9 °F | 36.4 °F | 3.37 in. |
| April | 29.0 °F | 50.0 °F | 3.67 in. |
| May | 42.0 °F | 63.5 °F | 3.61 in. |
| June | 50.0 °F | 71.2 °F | 4.82 in. |
| July | 55.1 °F | 75.8 °F | 4.8 in. |
| August | 53.3 °F | 74.7 °F | 4.38 in. |
| September | 46.0 °F | 67.2 °F | 3.76 in. |
| October | 35.4 °F | 54.1 °F | 4.63 in. |
| November | 25.1 °F | 41.4 °F | 3.38 in. |
| December | 14.1 °F | 30.2 °F | 3.88 in. |
| Annual | 31.8 °F | 51.4 °F | 46.2 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 4b : -25°F to -20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |