Weston, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.5 °C (low) to 11.4 °C (high). Annual precipitation averages 864.4 Millimeters. 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 | -14.7 °C | -5.3 °C | 30.73 mm |
| February | -13.7 °C | -2.9 °C | 27.18 mm |
| March | -7.4 °C | 3.6 °C | 44.7 mm |
| April | -0.3 °C | 11.4 °C | 78.49 mm |
| May | 6.7 °C | 18.7 °C | 95 mm |
| June | 12.2 °C | 23.9 °C | 117.6 mm |
| July | 14.4 °C | 26.3 °C | 95.76 mm |
| August | 13.3 °C | 25.2 °C | 104.65 mm |
| September | 8.8 °C | 20.8 °C | 100.84 mm |
| October | 2.2 °C | 13.1 °C | 79.25 mm |
| November | -4.2 °C | 4.7 °C | 50.55 mm |
| December | -10.8 °C | -2.3 °C | 39.62 mm |
| Annual | 0.5 °C | 11.4 °C | 864.37 mm |
| 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 : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |