| 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 5a: -20°F to -15°F Zone 5b: -15°F to -10°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: | 58x - Taconic Foothills |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 12834 - Greenwich, NY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 10 | 12 | 23 | 34 | 44 | 53 | 58 | 56 | 47 | 36 | 29 | 17 | 35 |
| Avg Max Temp (°F) | 32 | 35 | 45 | 58 | 70 | 78 | 83 | 81 | 73 | 61 | 48 | 37 | 58 |
| Avg Precip (In.) | 2.83 | 2.05 | 2.92 | 3.18 | 3.89 | 3.75 | 3.77 | 4.42 | 3.49 | 3.22 | 3.43 | 2.65 | 39.59 |