Leola, South Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Annual precipitation averages 552.7 Millimeters. Leola 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 Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -16.2 °C | -5.9 °C | 13.21 mm |
| February | -13.9 °C | -3.2 °C | 14.99 mm |
| March | -7.5 °C | 3.8 °C | 27.69 mm |
| April | -0.6 °C | 12.6 °C | 45.47 mm |
| May | 6.7 °C | 19.7 °C | 81.79 mm |
| June | 12.6 °C | 25 °C | 89.15 mm |
| July | 15.2 °C | 28.2 °C | 80.77 mm |
| August | 13.7 °C | 27.4 °C | 67.82 mm |
| September | 8.4 °C | 22.7 °C | 55.88 mm |
| October | 1.1 °C | 14.1 °C | 43.18 mm |
| November | -6.5 °C | 4.6 °C | 18.29 mm |
| December | -12.7 °C | -3 °C | 14.48 mm |
| Annual | 0 °C | 12.2 °C | 552.72 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| 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 | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |