Concord, Vermont has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.5 °C (low) to 11.8 °C (high). Annual precipitation averages 1069.3 Millimeters. Concord is located in USDA Plant Hardiness Zone 4b. 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 | -15.4 °C | -3.7 °C | 64.26 mm |
| February | -15 °C | -1.7 °C | 56.13 mm |
| March | -9.2 °C | 3.4 °C | 63.5 mm |
| April | -1.6 °C | 11.2 °C | 82.55 mm |
| May | 4.8 °C | 18.7 °C | 104.39 mm |
| June | 10.1 °C | 23.4 °C | 108.71 mm |
| July | 12.8 °C | 25.9 °C | 113.79 mm |
| August | 11.8 °C | 25.2 °C | 106.68 mm |
| September | 7.6 °C | 20.9 °C | 95 mm |
| October | 1.6 °C | 13.3 °C | 111.76 mm |
| November | -3.8 °C | 5.9 °C | 76.71 mm |
| December | -10.2 °C | -0.6 °C | 85.85 mm |
| Annual | -0.5 °C | 11.8 °C | 1069.33 mm |
| 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 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |