Hudson, New Hampshire has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 37.8 °F (low) to 59.6 °F (high). Annual precipitation averages 47.1 Inches. Hudson 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 | 34.2 °F | 3.37 in. |
| February | 16.4 °F | 37.3 °F | 3.25 in. |
| March | 24.4 °F | 45.1 °F | 4.2 in. |
| April | 35.0 °F | 58.2 °F | 4.06 in. |
| May | 45.9 °F | 69.2 °F | 3.79 in. |
| June | 55.2 °F | 78.2 °F | 4.29 in. |
| July | 60.9 °F | 83.8 °F | 3.61 in. |
| August | 59.1 °F | 82.1 °F | 3.85 in. |
| September | 51.2 °F | 74.6 °F | 3.81 in. |
| October | 39.2 °F | 62.0 °F | 4.81 in. |
| November | 30.0 °F | 50.2 °F | 3.79 in. |
| December | 21.2 °F | 39.7 °F | 4.31 in. |
| Annual | 37.8 °F | 59.6 °F | 47.14 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 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 |