| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F |
| Average First Frost Date: | Sep. 21 - Sep. 30 |
| Average Last Frost Date: | Jun. 11 - Jun. 20 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 58f - Vermont Piedmont |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 05301 - Brattleboro, VT | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 10 | 12 | 22 | 33 | 44 | 53 | 57 | 56 | 47 | 36 | 28 | 17 | 35 |
| Avg Max Temp (°F) | 31 | 34 | 44 | 56 | 69 | 77 | 82 | 80 | 72 | 61 | 47 | 36 | 57 |
| Avg Precip (In.) | 3.91 | 3.06 | 3.95 | 3.93 | 4.3 | 4.09 | 3.97 | 4.05 | 3.82 | 4.01 | 4.12 | 3.74 | 46.95 |