| 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 01570 - Webster, MA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 13 | 15 | 24 | 34 | 44 | 53 | 59 | 58 | 49 | 37 | 30 | 20 | 36 |
| Avg Max Temp (°F) | 34 | 36 | 45 | 57 | 68 | 77 | 81 | 79 | 72 | 61 | 50 | 39 | 58 |
| Avg Precip (In.) | 4.49 | 3.3 | 4.34 | 4.29 | 3.89 | 3.96 | 4.26 | 4.23 | 4.12 | 4.42 | 4.53 | 4.1 | 49.92 |