| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F 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 5a: -20F to -15F | |
| Average First Frost Date: | Oct. 1 - Oct. 10 | |
| Average Last Frost Date: | May 21 - May 31 | |
| 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 03835 - Farmington, NH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 12 | 13 | 23 | 32 | 43 | 53 | 58 | 56 | 48 | 38 | 29 | 18 | 35 |
| Avg Max Temp (°F) | 31 | 34 | 43 | 55 | 67 | 76 | 81 | 79 | 70 | 60 | 46 | 35 | 56 |
| Avg Precip (In.) | 3.88 | 3.45 | 4.17 | 4.58 | 3.93 | 3.9 | 3.91 | 3.82 | 3.86 | 4.45 | 4.91 | 4.15 | 49.02 |