| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 2012 Hardiness Zone: | Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F |
| 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: | 58b - Western New England Marble Valleys |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 06018 - Canaan, CT | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 13 | 15 | 24 | 33 | 44 | 53 | 58 | 56 | 48 | 37 | 29 | 19 | 36 |
| Avg Max Temp (°F) | 33 | 36 | 45 | 57 | 69 | 77 | 82 | 79 | 72 | 61 | 48 | 37 | 58 |
| Avg Precip (In.) | 3.56 | 2.77 | 3.62 | 3.88 | 4.36 | 4.11 | 4.32 | 4.44 | 4.03 | 3.87 | 3.83 | 3.52 | 46.31 |