| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F | |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F | |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F | |
| Average First Frost Date: | Oct. 11 - Oct. 20 | |
| Average Last Frost Date: | May 1 - May 10 | |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year | |
| Ecoregion: | 59c - Southern New England Coastal Plains and Hills | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 02833 - Hopkinton, RI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 20 | 21 | 28 | 37 | 46 | 56 | 62 | 61 | 53 | 42 | 34 | 25 | 41 |
| Avg Max Temp (°F) | 38 | 40 | 47 | 57 | 68 | 76 | 81 | 80 | 73 | 63 | 52 | 42 | 60 |
| Avg Precip (In.) | 4.6 | 3.62 | 4.72 | 4.5 | 3.96 | 3.62 | 3.34 | 4.13 | 4.07 | 4.1 | 4.79 | 4.49 | 49.93 |