Tyndall, South Dakota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 37 °F (low) to 59.7 °F (high). Annual precipitation averages 25.8 Inches. Tyndall 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 10.2 °F | 30.5 °F | 0.57 in. |
| February | 14.1 °F | 35.5 °F | 0.8 in. |
| March | 24.3 °F | 47.3 °F | 1.35 in. |
| April | 35.5 °F | 59.3 °F | 2.9 in. |
| May | 47.7 °F | 70.9 °F | 3.92 in. |
| June | 58.7 °F | 81.4 °F | 3.32 in. |
| July | 63.5 °F | 86.6 °F | 3.06 in. |
| August | 61.1 °F | 84.2 °F | 3.17 in. |
| September | 51.6 °F | 77.0 °F | 2.71 in. |
| October | 38.0 °F | 62.5 °F | 2.22 in. |
| November | 25.0 °F | 47.1 °F | 1.01 in. |
| December | 14.8 °F | 34.2 °F | 0.79 in. |
| Annual | 37 °F | 59.7 °F | 25.82 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| 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 |