| 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 |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F |
| Average First Frost Date: | Sep. 21 - Sep. 30 |
| 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 05753 - Middlebury, VT | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 9 | 10 | 21 | 34 | 46 | 54 | 59 | 57 | 48 | 37 | 28 | 16 | 35 |
| Avg Max Temp (°F) | 27 | 30 | 41 | 54 | 68 | 76 | 81 | 78 | 69 | 57 | 44 | 33 | 55 |
| Avg Precip (In.) | 2.42 | 1.91 | 2.41 | 2.71 | 3.45 | 3.31 | 3.72 | 4.19 | 3.77 | 3.31 | 3.14 | 2.6 | 36.94 |