| 2023 Hardiness Zone: | Zone 5b: -15°F to -10°F | |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F | |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F | |
| 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: | 58g - Worcester/Monadnock Plateau | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 03276 - Tilton, NH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 7 | 10 | 21 | 32 | 42 | 52 | 57 | 55 | 46 | 35 | 27 | 15 | 33 |
| Avg Max Temp (°F) | 29 | 33 | 42 | 55 | 68 | 76 | 81 | 79 | 70 | 59 | 46 | 34 | 56 |
| Avg Precip (In.) | 3.5 | 2.71 | 3.31 | 3.47 | 3.73 | 3.77 | 4.04 | 3.8 | 3.41 | 3.94 | 3.83 | 3.42 | 42.92 |