| 2023 Hardiness Zone: | Zone 7a: 0°F to 5°F | |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F | |
| 1990 Hardiness Zone: | Zone 6b: -5F to 0F | |
| Average First Frost Date: | Oct. 21 - Oct. 31 | |
| Average Last Frost Date: | Apr. 21 - Apr. 30 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 59c - Southern New England Coastal Plains and Hills | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 06907 - Stamford, CT | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 20 | 22 | 30 | 39 | 48 | 58 | 63 | 62 | 54 | 42 | 34 | 26 | 41 |
| Avg Max Temp (°F) | 38 | 40 | 49 | 60 | 70 | 79 | 84 | 82 | 75 | 64 | 53 | 42 | 61 |
| Avg Precip (In.) | 4.2 | 3.09 | 4.4 | 4.35 | 4.62 | 4.02 | 4 | 4.06 | 4.49 | 4.08 | 4.27 | 4 | 49.59 |