Bryant, South Dakota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 0.6 °C (low) to 11.9 °C (high). Annual precipitation averages 646.4 Millimeters. Bryant is located in USDA Plant Hardiness Zone 4b. 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 | -15.8 °C | -5.7 °C | 14.22 mm |
| February | -13.8 °C | -3.1 °C | 17.02 mm |
| March | -7.1 °C | 3.7 °C | 27.69 mm |
| April | -0.1 °C | 12.2 °C | 61.98 mm |
| May | 7.2 °C | 19.1 °C | 84.33 mm |
| June | 13.2 °C | 24.6 °C | 108.71 mm |
| July | 15.8 °C | 27.4 °C | 85.34 mm |
| August | 14.3 °C | 26.3 °C | 78.99 mm |
| September | 9.4 °C | 22.1 °C | 69.6 mm |
| October | 1.9 °C | 13.9 °C | 58.67 mm |
| November | -5.5 °C | 4.8 °C | 22.35 mm |
| December | -12.1 °C | -2.8 °C | 17.53 mm |
| Annual | 0.6 °C | 11.9 °C | 646.43 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 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |