Waverly, South Dakota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.1 °C (low) to 11.6 °C (high). Annual precipitation averages 630.4 Millimeters. Waverly 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 | -16.4 °C | -6.2 °C | 17.53 mm |
| February | -14.4 °C | -3.4 °C | 17.78 mm |
| March | -7.7 °C | 3.3 °C | 30.48 mm |
| April | -0.6 °C | 11.9 °C | 60.96 mm |
| May | 6.7 °C | 19 °C | 76.71 mm |
| June | 12.7 °C | 24.3 °C | 96.77 mm |
| July | 15.4 °C | 27.5 °C | 89.41 mm |
| August | 14 °C | 26.5 °C | 73.66 mm |
| September | 9.2 °C | 22 °C | 67.31 mm |
| October | 1.6 °C | 13.7 °C | 57.91 mm |
| November | -6.1 °C | 4.3 °C | 22.86 mm |
| December | -12.7 °C | -3.2 °C | 19.05 mm |
| Annual | 0.1 °C | 11.6 °C | 630.43 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 | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |