Aberdeen, South Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.2 °C (low) to 12.5 °C (high). Annual precipitation averages 566.4 Millimeters. Aberdeen is located in USDA Plant Hardiness Zone 4a. 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 | -16.7 °C | -5.7 °C | 13.46 mm |
| February | -14.2 °C | -2.8 °C | 16.51 mm |
| March | -7.3 °C | 4.2 °C | 24.38 mm |
| April | -0.2 °C | 12.9 °C | 49.28 mm |
| May | 7.1 °C | 20.1 °C | 79.25 mm |
| June | 13.2 °C | 25.6 °C | 90.68 mm |
| July | 15.7 °C | 28.3 °C | 89.66 mm |
| August | 14.1 °C | 27.4 °C | 59.69 mm |
| September | 8.8 °C | 23 °C | 55.37 mm |
| October | 1.2 °C | 14.6 °C | 52.07 mm |
| November | -6.6 °C | 5.1 °C | 20.07 mm |
| December | -13 °C | -2.7 °C | 16 mm |
| Annual | 0.2 °C | 12.5 °C | 566.42 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 4a : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |