| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F |
| 2012 Hardiness Zone: | Zone 4b: -25°F to -20°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 12921 - Chazy, NY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 6 | 8 | 20 | 32 | 44 | 54 | 58 | 56 | 48 | 38 | 28 | 14 | 34 |
| Avg Max Temp (°F) | 27 | 29 | 40 | 54 | 68 | 76 | 80 | 78 | 69 | 57 | 44 | 32 | 54 |
| Avg Precip (In.) | 1.26 | 1.04 | 1.58 | 2.44 | 2.91 | 3.17 | 3.53 | 3.85 | 3.4 | 2.93 | 2.78 | 1.6 | 30.5 |