Darlington, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.9 °C (low) to 14.1 °C (high). Annual precipitation averages 965.5 Millimeters. Darlington is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12.1 °C | -2.6 °C | 34.8 mm |
| February | -10.3 °C | -0.1 °C | 35.31 mm |
| March | -4.1 °C | 6.8 °C | 53.34 mm |
| April | 2.2 °C | 14.5 °C | 99.82 mm |
| May | 8.6 °C | 20.9 °C | 105.92 mm |
| June | 14.3 °C | 26.4 °C | 145.03 mm |
| July | 16.4 °C | 28.2 °C | 116.08 mm |
| August | 15.2 °C | 27.3 °C | 105.66 mm |
| September | 10.6 °C | 23.4 °C | 97.54 mm |
| October | 4.1 °C | 16.2 °C | 72.14 mm |
| November | -2.2 °C | 7.6 °C | 56.9 mm |
| December | -8.3 °C | 0.6 °C | 42.93 mm |
| Annual | 2.9 °C | 14.1 °C | 965.47 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 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 | Dfa - Humid Continental Hot Summers With Year Around Precipitation |