Fairburn, South Dakota has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 1.9 °C (low) to 16.1 °C (high). Annual precipitation averages 469.4 Millimeters. 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 | -9.6 °C | 3.3 °C | 7.87 mm |
| February | -8.9 °C | 4.4 °C | 12.7 mm |
| March | -4.3 °C | 9.8 °C | 22.35 mm |
| April | 0.3 °C | 14.4 °C | 51.82 mm |
| May | 6.2 °C | 19.4 °C | 90.17 mm |
| June | 11.7 °C | 25.8 °C | 80.52 mm |
| July | 15.4 °C | 30.5 °C | 62.23 mm |
| August | 14.2 °C | 29.9 °C | 49.53 mm |
| September | 8.8 °C | 25.2 °C | 36.58 mm |
| October | 1.9 °C | 16.9 °C | 34.54 mm |
| November | -3.9 °C | 9.4 °C | 11.68 mm |
| December | -8.6 °C | 3.9 °C | 9.4 mm |
| Annual | 1.9 °C | 16.1 °C | 469.39 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 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |