Leola, South Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 32 °F (low) to 53.9 °F (high). Annual precipitation averages 21.8 Inches. 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 | 2.8 °F | 21.4 °F | 0.52 in. |
| February | 7.0 °F | 26.3 °F | 0.59 in. |
| March | 18.5 °F | 38.8 °F | 1.09 in. |
| April | 31.0 °F | 54.7 °F | 1.79 in. |
| May | 44.0 °F | 67.5 °F | 3.22 in. |
| June | 54.7 °F | 77.0 °F | 3.51 in. |
| July | 59.3 °F | 82.7 °F | 3.18 in. |
| August | 56.7 °F | 81.3 °F | 2.67 in. |
| September | 47.1 °F | 72.8 °F | 2.2 in. |
| October | 33.9 °F | 57.3 °F | 1.7 in. |
| November | 20.3 °F | 40.2 °F | 0.72 in. |
| December | 9.1 °F | 26.6 °F | 0.57 in. |
| Annual | 32 °F | 53.9 °F | 21.76 in. |
| 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 : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |