| 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 | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 06039 - Lakeville, CT | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 12 | 14 | 23 | 33 | 44 | 52 | 57 | 56 | 48 | 36 | 28 | 19 | 35 |
| Avg Max Temp (°F) | 33 | 36 | 46 | 58 | 70 | 77 | 82 | 80 | 72 | 61 | 49 | 38 | 58 |
| Avg Precip (In.) | 3.64 | 2.81 | 3.7 | 3.92 | 4.49 | 4.29 | 4.49 | 4.53 | 4.12 | 3.94 | 3.83 | 3.57 | 47.33 |