Francestown, New Hampshire has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.4 °F (low) to 56.3 °F (high). Annual precipitation averages 49.6 Inches. Francestown is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 12.5 °F | 30.7 °F | 3.5 in. |
| February | 13.6 °F | 33.8 °F | 3.41 in. |
| March | 21.4 °F | 41.8 °F | 3.91 in. |
| April | 32.2 °F | 55.4 °F | 3.97 in. |
| May | 43.4 °F | 66.7 °F | 3.83 in. |
| June | 53.0 °F | 75.4 °F | 4.51 in. |
| July | 58.1 °F | 80.3 °F | 4.09 in. |
| August | 56.3 °F | 78.7 °F | 4.03 in. |
| September | 48.8 °F | 71.7 °F | 4.26 in. |
| October | 37.7 °F | 58.5 °F | 5.42 in. |
| November | 28.5 °F | 47.0 °F | 4.1 in. |
| December | 18.9 °F | 36.1 °F | 4.55 in. |
| Annual | 35.4 °F | 56.3 °F | 49.58 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |