| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F | |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F | |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F | |
| 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: | 67k - Northern Glaciated Shale and Slate Valleys | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 10918 - Chester, NY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 17 | 18 | 27 | 37 | 48 | 56 | 61 | 60 | 52 | 40 | 32 | 23 | 39 |
| Avg Max Temp (°F) | 35 | 38 | 48 | 60 | 71 | 79 | 84 | 82 | 74 | 63 | 51 | 40 | 60 |
| Avg Precip (In.) | 3.54 | 2.77 | 3.73 | 4.05 | 4.55 | 4.31 | 4.2 | 4.05 | 4.28 | 3.61 | 3.84 | 3.47 | 46.4 |