Ardmore, South Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 33.2 °F (low) to 62.6 °F (high). Annual precipitation averages 17.8 Inches. 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 | 11.5 °F | 37.9 °F | 0.4 in. |
| February | 13.9 °F | 40.9 °F | 0.61 in. |
| March | 22.7 °F | 51.7 °F | 1.19 in. |
| April | 30.8 °F | 60.0 °F | 1.91 in. |
| May | 41.7 °F | 69.2 °F | 2.99 in. |
| June | 51.7 °F | 80.7 °F | 2.89 in. |
| July | 58.4 °F | 89.5 °F | 2.31 in. |
| August | 55.8 °F | 88.8 °F | 1.6 in. |
| September | 45.4 °F | 79.6 °F | 1.32 in. |
| October | 32.6 °F | 64.1 °F | 1.42 in. |
| November | 20.8 °F | 49.5 °F | 0.59 in. |
| December | 12.5 °F | 38.7 °F | 0.58 in. |
| Annual | 33.2 °F | 62.6 °F | 17.81 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 4a : -30°F to -25°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |