Newport, Vermont has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.5 °C (low) to 11.7 °C (high). Annual precipitation averages 1119.9 Millimeters. Newport 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 | -14.9 °C | -4.3 °C | 74.42 mm |
| February | -14.4 °C | -2.3 °C | 65.28 mm |
| March | -8.6 °C | 2.9 °C | 72.14 mm |
| April | -0.6 °C | 10.9 °C | 84.84 mm |
| May | 6.1 °C | 18.7 °C | 99.06 mm |
| June | 11.4 °C | 23.6 °C | 114.05 mm |
| July | 14 °C | 26 °C | 122.17 mm |
| August | 13.1 °C | 25.1 °C | 115.32 mm |
| September | 8.8 °C | 20.9 °C | 94.23 mm |
| October | 2.8 °C | 13.3 °C | 109.98 mm |
| November | -2.9 °C | 5.9 °C | 83.31 mm |
| December | -9.4 °C | -0.4 °C | 85.09 mm |
| Annual | 0.5 °C | 11.7 °C | 1119.89 mm |
| 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 : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |