| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F |
| 1990 Hardiness Zone: | Zone 4a: -30F to -25F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 1 - May 10 |
| 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 05458 - Grand Isle, VT | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 8 | 10 | 21 | 34 | 46 | 56 | 61 | 59 | 50 | 40 | 30 | 17 | 36 |
| Avg Max Temp (°F) | 26 | 29 | 39 | 53 | 67 | 76 | 81 | 78 | 69 | 57 | 44 | 32 | 54 |
| Avg Precip (In.) | 2.08 | 1.59 | 2.12 | 2.79 | 3.01 | 3.27 | 3.38 | 3.94 | 3.49 | 2.9 | 2.9 | 2.19 | 33.66 |