Mount Horeb, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3.3 °C (low) to 13.3 °C (high). Annual precipitation averages 995.7 Millimeters. Mount Horeb is located in USDA Plant Hardiness Zone 5b. 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 | -11.7 °C | -3.3 °C | 38.86 mm |
| February | -9.6 °C | -0.8 °C | 39.37 mm |
| March | -3.8 °C | 5.8 °C | 53.34 mm |
| April | 2.3 °C | 13.5 °C | 100.33 mm |
| May | 9 °C | 20.1 °C | 116.33 mm |
| June | 14.3 °C | 25.3 °C | 149.35 mm |
| July | 16.8 °C | 27.3 °C | 114.3 mm |
| August | 16 °C | 26.4 °C | 113.28 mm |
| September | 11.2 °C | 22.5 °C | 93.73 mm |
| October | 4.7 °C | 15.5 °C | 74.17 mm |
| November | -1.7 °C | 7.1 °C | 57.91 mm |
| December | -7.9 °C | -0.1 °C | 44.7 mm |
| Annual | 3.3 °C | 13.3 °C | 995.67 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 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |