Orleans, Vermont has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 31.6 °F (low) to 52.7 °F (high). Annual precipitation averages 45.5 Inches. Orleans is located in USDA Plant Hardiness Zone 4b. 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 | 4.4 °F | 24.3 °F | 3.1 in. |
| February | 5.4 °F | 27.9 °F | 2.61 in. |
| March | 15.6 °F | 37.1 °F | 2.95 in. |
| April | 30.1 °F | 51.4 °F | 3.47 in. |
| May | 42.0 °F | 65.1 °F | 4.09 in. |
| June | 51.2 °F | 73.8 °F | 4.69 in. |
| July | 55.9 °F | 78.4 °F | 4.77 in. |
| August | 54.2 °F | 76.7 °F | 4.52 in. |
| September | 46.4 °F | 69.2 °F | 3.79 in. |
| October | 35.4 °F | 55.6 °F | 4.49 in. |
| November | 25.1 °F | 42.1 °F | 3.41 in. |
| December | 14.0 °F | 30.9 °F | 3.64 in. |
| Annual | 31.6 °F | 52.7 °F | 45.53 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 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |