Dallas, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.6 °C (low) to 11.8 °C (high). Annual precipitation averages 863.1 Millimeters. Dallas 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 Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -15.7 °C | -5.6 °C | 25.91 mm |
| February | -14.1 °C | -2.9 °C | 26.92 mm |
| March | -7.2 °C | 4 °C | 50.8 mm |
| April | 0.1 °C | 12.2 °C | 80.01 mm |
| May | 7.1 °C | 19.4 °C | 100.58 mm |
| June | 12.7 °C | 24.5 °C | 118.87 mm |
| July | 15 °C | 26.8 °C | 100.58 mm |
| August | 13.7 °C | 25.7 °C | 111.76 mm |
| September | 9.1 °C | 21.4 °C | 91.69 mm |
| October | 2.3 °C | 13.6 °C | 75.69 mm |
| November | -4.3 °C | 4.7 °C | 45.97 mm |
| December | -11.4 °C | -2.7 °C | 34.29 mm |
| Annual | 0.6 °C | 11.8 °C | 863.07 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| 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 |