Tyndall, South Dakota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.8 °C (low) to 15.4 °C (high). Annual precipitation averages 655.8 Millimeters. 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 | -12.1 °C | -0.8 °C | 14.48 mm |
| February | -9.9 °C | 1.9 °C | 20.32 mm |
| March | -4.3 °C | 8.5 °C | 34.29 mm |
| April | 1.9 °C | 15.2 °C | 73.66 mm |
| May | 8.7 °C | 21.6 °C | 99.57 mm |
| June | 14.8 °C | 27.4 °C | 84.33 mm |
| July | 17.5 °C | 30.3 °C | 77.72 mm |
| August | 16.2 °C | 29 °C | 80.52 mm |
| September | 10.9 °C | 25 °C | 68.83 mm |
| October | 3.3 °C | 16.9 °C | 56.39 mm |
| November | -3.9 °C | 8.4 °C | 25.65 mm |
| December | -9.6 °C | 1.2 °C | 20.07 mm |
| Annual | 2.8 °C | 15.4 °C | 655.83 mm |
| 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 : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |