Oral, South Dakota has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 33.7 °F (low) to 62.8 °F (high). Annual precipitation averages 18.4 Inches. Oral 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 | 12.7 °F | 38.0 °F | 0.38 in. |
| February | 14.2 °F | 40.9 °F | 0.59 in. |
| March | 22.8 °F | 51.4 °F | 0.91 in. |
| April | 31.3 °F | 60.5 °F | 1.9 in. |
| May | 42.4 °F | 69.7 °F | 3.46 in. |
| June | 52.2 °F | 81.2 °F | 3.08 in. |
| July | 58.4 °F | 89.5 °F | 2.37 in. |
| August | 55.7 °F | 88.4 °F | 2.0 in. |
| September | 45.3 °F | 79.7 °F | 1.47 in. |
| October | 33.1 °F | 64.2 °F | 1.29 in. |
| November | 21.9 °F | 50.0 °F | 0.53 in. |
| December | 14.1 °F | 39.5 °F | 0.46 in. |
| Annual | 33.7 °F | 62.8 °F | 18.44 in. |
| 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 : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |