| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 59c - Southern New England Coastal Plains and Hills |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 01950 - Newburyport, MA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 17 | 19 | 27 | 36 | 46 | 55 | 61 | 60 | 52 | 41 | 33 | 23 | 39 |
| Avg Max Temp (°F) | 34 | 36 | 45 | 55 | 66 | 75 | 80 | 78 | 71 | 60 | 49 | 39 | 57 |
| Avg Precip (In.) | 4.13 | 3.39 | 4.16 | 4.42 | 3.6 | 3.69 | 3.56 | 3.35 | 3.95 | 4.29 | 4.65 | 4.2 | 47.39 |