| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F | |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F 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: | 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 01566 - Sturbridge, MA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 12 | 14 | 23 | 34 | 44 | 53 | 58 | 57 | 48 | 37 | 30 | 19 | 36 |
| Avg Max Temp (°F) | 33 | 36 | 45 | 56 | 68 | 77 | 82 | 79 | 71 | 61 | 49 | 38 | 58 |
| Avg Precip (In.) | 4.38 | 3.21 | 4.34 | 4.31 | 3.89 | 4.02 | 3.99 | 4.11 | 4.21 | 4.5 | 4.44 | 4.11 | 49.5 |