| 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 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: | 83e - Upper St. Lawrence Valley |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 13309 - Boonville, NY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 7 | 9 | 19 | 32 | 43 | 52 | 57 | 55 | 47 | 36 | 27 | 15 | 33 |
| Avg Max Temp (°F) | 26 | 29 | 38 | 51 | 65 | 73 | 77 | 75 | 67 | 56 | 43 | 31 | 52 |
| Avg Precip (In.) | 5.12 | 3.78 | 4.45 | 4.21 | 4.23 | 4.45 | 4.04 | 4.47 | 5.56 | 4.35 | 5.23 | 5 | 54.89 |