Tea, South Dakota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 1.7 °C (low) to 13.4 °C (high). Annual precipitation averages 709.7 Millimeters. Tea is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -14.2 °C | -3.9 °C | 15.75 mm |
| February | -11.8 °C | -1.2 °C | 20.07 mm |
| March | -5.5 °C | 5.8 °C | 36.83 mm |
| April | 1.1 °C | 13.7 °C | 74.93 mm |
| May | 8.2 °C | 20.5 °C | 95 mm |
| June | 14.4 °C | 26.2 °C | 113.54 mm |
| July | 16.6 °C | 28.6 °C | 85.34 mm |
| August | 15.1 °C | 27.2 °C | 84.84 mm |
| September | 10.1 °C | 23.3 °C | 72.14 mm |
| October | 2.6 °C | 15.6 °C | 60.45 mm |
| November | -4.9 °C | 6.3 °C | 29.21 mm |
| December | -11.1 °C | -1.3 °C | 21.59 mm |
| Annual | 1.7 °C | 13.4 °C | 709.69 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |