Hudson, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.6 °F (low) to 55.4 °F (high). Annual precipitation averages 34.1 Inches. Hudson is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 7.1 °F | 24.0 °F | 0.96 in. |
| February | 10.3 °F | 29.0 °F | 0.85 in. |
| March | 22.4 °F | 41.4 °F | 1.65 in. |
| April | 35.6 °F | 56.3 °F | 3.07 in. |
| May | 48.2 °F | 68.6 °F | 4.2 in. |
| June | 58.6 °F | 78.5 °F | 5.09 in. |
| July | 63.2 °F | 82.8 °F | 4.35 in. |
| August | 60.6 °F | 80.6 °F | 4.52 in. |
| September | 52.3 °F | 72.9 °F | 3.5 in. |
| October | 39.4 °F | 58.8 °F | 2.9 in. |
| November | 26.8 °F | 42.7 °F | 1.65 in. |
| December | 14.4 °F | 29.1 °F | 1.31 in. |
| Annual | 36.6 °F | 55.4 °F | 34.05 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |