| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F | |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°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: | 59h - Gulf of Maine Coastal Plain | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 03811 - Atkinson, NH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 14 | 17 | 25 | 34 | 44 | 54 | 60 | 58 | 49 | 38 | 31 | 21 | 37 |
| Avg Max Temp (°F) | 35 | 37 | 46 | 58 | 69 | 78 | 83 | 81 | 73 | 62 | 50 | 39 | 59 |
| Avg Precip (In.) | 3.93 | 3.25 | 4.05 | 4.24 | 3.69 | 3.66 | 3.57 | 3.52 | 3.82 | 4.21 | 4.5 | 3.99 | 46.42 |