Vesper, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 34 °F (low) to 54.3 °F (high). Annual precipitation averages 33.3 Inches. Vesper is located in USDA Plant Hardiness Zone 4b. 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 | 6.4 °F | 24.3 °F | 1.12 in. |
| February | 9.1 °F | 28.8 °F | 1.04 in. |
| March | 20.3 °F | 40.7 °F | 1.74 in. |
| April | 32.9 °F | 55.1 °F | 3.23 in. |
| May | 45.2 °F | 67.3 °F | 3.95 in. |
| June | 55.0 °F | 76.4 °F | 4.73 in. |
| July | 58.7 °F | 80.7 °F | 3.8 in. |
| August | 56.6 °F | 78.6 °F | 4.02 in. |
| September | 48.4 °F | 71.1 °F | 3.64 in. |
| October | 36.8 °F | 57.4 °F | 2.77 in. |
| November | 25.3 °F | 42.2 °F | 1.82 in. |
| December | 13.5 °F | 29.3 °F | 1.47 in. |
| Annual | 34 °F | 54.3 °F | 33.33 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 4b : -25°F to -20°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 |