Gayville, South Dakota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 36.8 °F (low) to 59.4 °F (high). Annual precipitation averages 27.8 Inches. Gayville is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 9.2 °F | 29.1 °F | 0.57 in. |
| February | 13.0 °F | 34.3 °F | 0.75 in. |
| March | 24.1 °F | 46.5 °F | 1.49 in. |
| April | 35.3 °F | 59.9 °F | 3.01 in. |
| May | 47.7 °F | 71.3 °F | 3.99 in. |
| June | 59.0 °F | 81.7 °F | 4.29 in. |
| July | 63.3 °F | 86.1 °F | 3.06 in. |
| August | 60.8 °F | 83.7 °F | 3.21 in. |
| September | 51.6 °F | 77.0 °F | 2.92 in. |
| October | 38.2 °F | 63.2 °F | 2.48 in. |
| November | 25.0 °F | 46.8 °F | 1.22 in. |
| December | 14.3 °F | 33.1 °F | 0.84 in. |
| Annual | 36.8 °F | 59.4 °F | 27.83 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |