| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F 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 6a: -10F to -5F |
| 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 |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 06525 - Woodbridge, CT | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 20 | 22 | 30 | 39 | 49 | 58 | 64 | 63 | 55 | 43 | 35 | 26 | 42 |
| Avg Max Temp (°F) | 36 | 39 | 47 | 58 | 69 | 78 | 83 | 81 | 73 | 62 | 51 | 41 | 60 |
| Avg Precip (In.) | 4.59 | 3.3 | 4.62 | 4.59 | 4.65 | 4.2 | 4.15 | 4.24 | 4.39 | 4.5 | 4.56 | 4.25 | 52.06 |