| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 2012 Hardiness Zone: | Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F |
| 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: | 58e - Berkshire Transition |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 01039 - Haydenville, MA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 11 | 13 | 23 | 33 | 44 | 53 | 58 | 56 | 48 | 36 | 29 | 18 | 35 |
| Avg Max Temp (°F) | 33 | 36 | 45 | 57 | 69 | 78 | 83 | 80 | 72 | 61 | 49 | 37 | 58 |
| Avg Precip (In.) | 3.32 | 3.13 | 3.99 | 4.03 | 4.33 | 3.87 | 4.2 | 4.36 | 3.91 | 3.43 | 4.18 | 3.67 | 46.4 |