| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°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: | Apr. 21 - Apr. 30 | |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 59c - Southern New England Coastal Plains and Hills | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 06360 - Norwich, CT | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 17 | 19 | 28 | 37 | 47 | 56 | 62 | 61 | 53 | 40 | 32 | 23 | 40 |
| Avg Max Temp (°F) | 37 | 40 | 48 | 58 | 70 | 78 | 83 | 82 | 74 | 64 | 53 | 42 | 61 |
| Avg Precip (In.) | 4.7 | 3.77 | 4.87 | 4.55 | 4.13 | 3.7 | 3.72 | 4.72 | 4.27 | 4.51 | 4.81 | 4.65 | 52.39 |