| 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 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 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 83f - Mohawk Valley |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 13357 - Ilion, NY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 12 | 14 | 23 | 34 | 45 | 54 | 58 | 57 | 49 | 39 | 30 | 19 | 36 |
| Avg Max Temp (°F) | 30 | 33 | 42 | 55 | 69 | 78 | 82 | 80 | 71 | 60 | 47 | 35 | 57 |
| Avg Precip (In.) | 2.87 | 2.43 | 3.28 | 3.59 | 3.86 | 4.33 | 4.21 | 3.93 | 4.44 | 3.45 | 4.05 | 3.23 | 43.67 |