Dupree, South Dakota has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 33.4 °F (low) to 58 °F (high). Annual precipitation averages 18.6 Inches. Dupree 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 Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 8.7 °F | 29.0 °F | 0.41 in. |
| February | 11.5 °F | 32.5 °F | 0.59 in. |
| March | 20.8 °F | 44.2 °F | 0.9 in. |
| April | 31.5 °F | 57.2 °F | 1.89 in. |
| May | 43.2 °F | 67.9 °F | 3.19 in. |
| June | 53.6 °F | 78.6 °F | 3.51 in. |
| July | 59.6 °F | 87.0 °F | 2.47 in. |
| August | 57.1 °F | 86.4 °F | 1.85 in. |
| September | 47.4 °F | 76.6 °F | 1.23 in. |
| October | 34.1 °F | 60.0 °F | 1.59 in. |
| November | 21.6 °F | 44.4 °F | 0.48 in. |
| December | 11.9 °F | 32.3 °F | 0.51 in. |
| Annual | 33.4 °F | 58 °F | 18.62 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |