Holcombe, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.4 °C (low) to 11.8 °C (high). Annual precipitation averages 797.3 Millimeters. Holcombe 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 | -15.8 °C | -5.2 °C | 25.65 mm |
| February | -14.3 °C | -2.6 °C | 24.38 mm |
| March | -7.4 °C | 4.2 °C | 38.86 mm |
| April | 0.1 °C | 12.1 °C | 70.1 mm |
| May | 6.8 °C | 19.5 °C | 92.71 mm |
| June | 12.3 °C | 24.3 °C | 112.27 mm |
| July | 14.7 °C | 26.7 °C | 93.47 mm |
| August | 13.3 °C | 25.6 °C | 102.87 mm |
| September | 8.8 °C | 21.3 °C | 87.88 mm |
| October | 2.3 °C | 13.7 °C | 75.18 mm |
| November | -4.3 °C | 4.7 °C | 43.69 mm |
| December | -11.3 °C | -2.3 °C | 30.23 mm |
| Annual | 0.4 °C | 11.8 °C | 797.29 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 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |