| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 21 - May 31 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 60a - Glaciated Low Plateau |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 13780 - Guilford, NY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 12 | 13 | 22 | 32 | 42 | 51 | 55 | 54 | 47 | 36 | 29 | 18 | 34 |
| Avg Max Temp (°F) | 31 | 34 | 43 | 55 | 68 | 75 | 80 | 78 | 70 | 59 | 47 | 36 | 56 |
| Avg Precip (In.) | 2.71 | 2.26 | 2.95 | 3.41 | 3.82 | 4.19 | 4.54 | 3.66 | 4.11 | 3.48 | 3.64 | 3.01 | 41.76 |