Ardmore, South Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.6 °C (low) to 17 °C (high). Annual precipitation averages 452.4 Millimeters. Ardmore 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 | -11.4 °C | 3.3 °C | 10.16 mm |
| February | -10.1 °C | 4.9 °C | 15.49 mm |
| March | -5.2 °C | 10.9 °C | 30.23 mm |
| April | -0.7 °C | 15.6 °C | 48.51 mm |
| May | 5.4 °C | 20.7 °C | 75.95 mm |
| June | 10.9 °C | 27.1 °C | 73.41 mm |
| July | 14.7 °C | 31.9 °C | 58.67 mm |
| August | 13.2 °C | 31.6 °C | 40.64 mm |
| September | 7.4 °C | 26.4 °C | 33.53 mm |
| October | 0.3 °C | 17.8 °C | 36.07 mm |
| November | -6.2 °C | 9.7 °C | 14.99 mm |
| December | -10.8 °C | 3.7 °C | 14.73 mm |
| Annual | 0.6 °C | 17 °C | 452.38 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 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |