| 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 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: | 58b - Western New England Marble Valleys |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 01236 - Housatonic, 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 | 37 | 29 | 18 | 35 |
| Avg Max Temp (°F) | 32 | 34 | 44 | 56 | 68 | 76 | 80 | 78 | 70 | 59 | 47 | 36 | 57 |
| Avg Precip (In.) | 3.51 | 2.88 | 3.72 | 4.01 | 4.77 | 4.16 | 4.34 | 4.68 | 4.04 | 3.94 | 3.95 | 3.56 | 47.56 |