| 2023 Hardiness Zone: | Zone 7a: 0°F to 5°F | |
| 2012 Hardiness Zone: | Zone 7a: 0°F to 5°F | |
| 1990 Hardiness Zone: | Zone 6b: -5F to 0F | |
| Average First Frost Date: | Oct. 11 - Oct. 20 | |
| Average Last Frost Date: | May 1 - May 10 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 59e - Narragansett/Bristol Lowland | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 02835 - Jamestown, RI | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 22 | 23 | 30 | 38 | 48 | 57 | 63 | 63 | 57 | 46 | 37 | 28 | 43 |
| Avg Max Temp (°F) | 38 | 39 | 46 | 55 | 64 | 73 | 78 | 78 | 72 | 62 | 52 | 43 | 59 |
| Avg Precip (In.) | 4.33 | 3.54 | 4.56 | 4.34 | 3.61 | 3.22 | 3.06 | 3.77 | 3.7 | 3.77 | 4.56 | 4.35 | 46.81 |