| 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: | 58d - Lower Berkshire Hills | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 01253 - Otis, MA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 9 | 11 | 21 | 31 | 43 | 51 | 57 | 55 | 46 | 35 | 27 | 16 | 33 |
| Avg Max Temp (°F) | 30 | 34 | 44 | 56 | 69 | 77 | 82 | 79 | 70 | 60 | 48 | 35 | 57 |
| Avg Precip (In.) | 4.04 | 3.31 | 4.31 | 4.25 | 5.02 | 4.46 | 4.76 | 4.95 | 4.44 | 4.41 | 4.51 | 4.16 | 52.63 |