Fairburn, South Dakota has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 35.5 °F (low) to 60.9 °F (high). Annual precipitation averages 18.5 Inches. Fairburn 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 | 14.8 °F | 37.9 °F | 0.31 in. |
| February | 16.0 °F | 40.0 °F | 0.5 in. |
| March | 24.2 °F | 49.7 °F | 0.88 in. |
| April | 32.5 °F | 57.9 °F | 2.04 in. |
| May | 43.1 °F | 67.0 °F | 3.55 in. |
| June | 53.1 °F | 78.4 °F | 3.17 in. |
| July | 59.7 °F | 86.9 °F | 2.45 in. |
| August | 57.5 °F | 85.8 °F | 1.95 in. |
| September | 47.9 °F | 77.3 °F | 1.44 in. |
| October | 35.5 °F | 62.4 °F | 1.36 in. |
| November | 25.0 °F | 48.9 °F | 0.46 in. |
| December | 16.6 °F | 39.1 °F | 0.37 in. |
| Annual | 35.5 °F | 60.9 °F | 18.48 in. |
| 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 : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |