Wittenberg, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.3 °C (low) to 11.6 °C (high). Annual precipitation averages 842.3 Millimeters. Wittenberg is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -14.7 °C | -5.1 °C | 28.96 mm |
| February | -13.8 °C | -2.7 °C | 27.43 mm |
| March | -7.6 °C | 3.8 °C | 42.67 mm |
| April | -0.6 °C | 11.7 °C | 78.23 mm |
| May | 6.3 °C | 18.8 °C | 99.06 mm |
| June | 11.9 °C | 24 °C | 115.06 mm |
| July | 14 °C | 26.3 °C | 95.76 mm |
| August | 12.9 °C | 25.3 °C | 93.73 mm |
| September | 8.4 °C | 20.9 °C | 95.5 mm |
| October | 1.9 °C | 13.3 °C | 77.22 mm |
| November | -4.2 °C | 5.1 °C | 48.77 mm |
| December | -10.8 °C | -2.1 °C | 39.88 mm |
| Annual | 0.3 °C | 11.6 °C | 842.27 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°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 |