| 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 | |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F | |
| Average First Frost Date: | Oct. 1 - Oct. 10 | |
| Average Last Frost Date: | May 11 - May 20 | |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 59b - Lower Worcester Plateau/Eastern Connecticut Upland | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 01081 - Wales, MA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 12 | 14 | 23 | 33 | 43 | 52 | 57 | 55 | 47 | 36 | 29 | 18 | 35 |
| Avg Max Temp (°F) | 33 | 35 | 45 | 56 | 68 | 76 | 81 | 79 | 71 | 60 | 49 | 37 | 57 |
| Avg Precip (In.) | 4.32 | 3.17 | 4.22 | 4.3 | 4.01 | 4.02 | 4.07 | 4.31 | 4.24 | 4.35 | 4.44 | 4 | 49.44 |