| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°F | |
| 2012 Hardiness Zone: | Zone 5b: -15°F to -10°F | |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F | |
| Average First Frost Date: | Oct. 1 - Oct. 10 | |
| Average Last Frost Date: | May 21 - May 31 | |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 58g - Worcester/Monadnock Plateau | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 01355 - New Salem, MA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 10 | 12 | 22 | 32 | 42 | 51 | 56 | 54 | 46 | 35 | 28 | 17 | 34 |
| Avg Max Temp (°F) | 31 | 35 | 44 | 56 | 68 | 77 | 81 | 79 | 71 | 60 | 47 | 35 | 57 |
| Avg Precip (In.) | 4.5 | 3.51 | 4.48 | 4.56 | 4.58 | 4.47 | 4.44 | 4.93 | 4.56 | 4.61 | 4.81 | 4.3 | 53.74 |