| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°F |
| 1990 Hardiness Zone: | Zone 4a: -30F to -25F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 1 - May 10 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 58c - Green Mountains/Berkshire Highlands |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 05676 - Waterbury, VT | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 6 | 8 | 19 | 30 | 42 | 50 | 55 | 53 | 45 | 35 | 26 | 13 | 32 |
| Avg Max Temp (°F) | 26 | 29 | 39 | 52 | 66 | 74 | 78 | 76 | 67 | 55 | 42 | 30 | 53 |
| Avg Precip (In.) | 2.88 | 2.24 | 2.96 | 3.09 | 3.61 | 3.96 | 4.07 | 4.53 | 3.81 | 3.54 | 3.6 | 3.02 | 41.31 |