Lee, New Hampshire has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 37.1 °F (low) to 58 °F (high). Annual precipitation averages 45.5 Inches. Lee 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 | 14.6 °F | 33.2 °F | 3.03 in. |
| February | 16.3 °F | 36.0 °F | 3.07 in. |
| March | 24.2 °F | 43.6 °F | 3.79 in. |
| April | 34.2 °F | 56.1 °F | 4.1 in. |
| May | 44.3 °F | 66.7 °F | 3.68 in. |
| June | 53.6 °F | 76.2 °F | 4.08 in. |
| July | 59.5 °F | 81.7 °F | 3.84 in. |
| August | 57.9 °F | 80.7 °F | 3.65 in. |
| September | 50.2 °F | 73.2 °F | 3.82 in. |
| October | 38.7 °F | 60.8 °F | 4.5 in. |
| November | 29.9 °F | 49.4 °F | 3.79 in. |
| December | 21.4 °F | 38.3 °F | 4.13 in. |
| Annual | 37.1 °F | 58 °F | 45.48 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 | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |