Reedsburg, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.9 °C (low) to 13.3 °C (high). Annual precipitation averages 977.4 Millimeters. Reedsburg is located in USDA Plant Hardiness Zone 5a. 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 | -13 °C | -3.2 °C | 38.1 mm |
| February | -11.6 °C | -0.8 °C | 36.32 mm |
| March | -5.4 °C | 5.9 °C | 54.61 mm |
| April | 1.1 °C | 13.5 °C | 102.62 mm |
| May | 7.7 °C | 20.2 °C | 115.32 mm |
| June | 13.4 °C | 25.5 °C | 138.94 mm |
| July | 15.6 °C | 27.7 °C | 113.79 mm |
| August | 14.3 °C | 26.6 °C | 115.32 mm |
| September | 9.7 °C | 22.5 °C | 88.9 mm |
| October | 3 °C | 15.2 °C | 74.42 mm |
| November | -3.2 °C | 6.8 °C | 53.09 mm |
| December | -9.1 °C | -0.2 °C | 45.97 mm |
| Annual | 1.9 °C | 13.3 °C | 977.4 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 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |