Weston, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 33 °F (low) to 52.6 °F (high). Annual precipitation averages 34 Inches. Weston is located in USDA Plant Hardiness Zone 5a. 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 | 5.5 °F | 22.5 °F | 1.21 in. |
| February | 7.4 °F | 26.7 °F | 1.07 in. |
| March | 18.6 °F | 38.5 °F | 1.76 in. |
| April | 31.5 °F | 52.6 °F | 3.09 in. |
| May | 44.0 °F | 65.6 °F | 3.74 in. |
| June | 54.0 °F | 75.0 °F | 4.63 in. |
| July | 57.9 °F | 79.3 °F | 3.77 in. |
| August | 55.9 °F | 77.3 °F | 4.12 in. |
| September | 47.8 °F | 69.5 °F | 3.97 in. |
| October | 35.9 °F | 55.6 °F | 3.12 in. |
| November | 24.5 °F | 40.5 °F | 1.99 in. |
| December | 12.6 °F | 27.8 °F | 1.56 in. |
| Annual | 33 °F | 52.6 °F | 34.03 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 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |