| 2023 Hardiness Zone: | Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°F |
| 2012 Hardiness Zone: | Zone 4a: -30°F to -25°F |
| 1990 Hardiness Zone: | Zone 4a: -30F to -25F |
| Average First Frost Date: | Sep. 21 - Sep. 30 |
| Average Last Frost Date: | Jun. 1 - Jun. 10 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 58l - Northern Piedmont |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 05829 - Derby, VT | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 4 | 6 | 17 | 30 | 42 | 51 | 56 | 54 | 46 | 36 | 26 | 12 | 32 |
| Avg Max Temp (°F) | 25 | 29 | 40 | 52 | 67 | 75 | 79 | 77 | 68 | 56 | 42 | 30 | 53 |
| Avg Precip (In.) | 3.1 | 2.27 | 3.11 | 3.05 | 3.88 | 4.21 | 4.41 | 4.31 | 3.96 | 3.62 | 3.62 | 3.3 | 42.84 |