Oral, South Dakota has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 0.9 °C (low) to 17.1 °C (high). Annual precipitation averages 468.4 Millimeters. 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 | -10.7 °C | 3.3 °C | 9.65 mm |
| February | -9.9 °C | 4.9 °C | 14.99 mm |
| March | -5.1 °C | 10.8 °C | 23.11 mm |
| April | -0.4 °C | 15.8 °C | 48.26 mm |
| May | 5.8 °C | 20.9 °C | 87.88 mm |
| June | 11.2 °C | 27.3 °C | 78.23 mm |
| July | 14.7 °C | 31.9 °C | 60.2 mm |
| August | 13.2 °C | 31.3 °C | 50.8 mm |
| September | 7.4 °C | 26.5 °C | 37.34 mm |
| October | 0.6 °C | 17.9 °C | 32.77 mm |
| November | -5.6 °C | 10 °C | 13.46 mm |
| December | -9.9 °C | 4.2 °C | 11.68 mm |
| Annual | 0.9 °C | 17.1 °C | 468.37 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 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |