| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 83b - Champlain Lowlands |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 05760 - Orwell, VT | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 10 | 11 | 22 | 34 | 45 | 54 | 59 | 57 | 49 | 37 | 29 | 17 | 35 |
| Avg Max Temp (°F) | 28 | 32 | 42 | 55 | 69 | 77 | 81 | 79 | 70 | 58 | 45 | 34 | 56 |
| Avg Precip (In.) | 2.49 | 1.93 | 2.49 | 2.76 | 3.5 | 3.45 | 3.88 | 4.22 | 3.77 | 3.3 | 3.21 | 2.64 | 37.65 |