Elmwood, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.5 °C (low) to 12.6 °C (high). Annual precipitation averages 878.1 Millimeters. Elmwood 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 | -14.7 °C | -4.8 °C | 25.65 mm |
| February | -12.8 °C | -2.1 °C | 26.42 mm |
| March | -6.1 °C | 4.8 °C | 47.5 mm |
| April | 1 °C | 13.1 °C | 77.47 mm |
| May | 7.9 °C | 20.1 °C | 107.44 mm |
| June | 13.7 °C | 25.2 °C | 133.6 mm |
| July | 15.9 °C | 27.6 °C | 102.87 mm |
| August | 14.6 °C | 26.4 °C | 114.55 mm |
| September | 10.1 °C | 22.3 °C | 93.22 mm |
| October | 3.1 °C | 14.6 °C | 70.1 mm |
| November | -3.7 °C | 5.6 °C | 44.2 mm |
| December | -10.5 °C | -1.9 °C | 35.05 mm |
| Annual | 1.5 °C | 12.6 °C | 878.07 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 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |