Swink, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 2.8 °C (low) to 21.2 °C (high). Annual precipitation averages 322.8 Millimeters. Swink is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.6 °C | 8.6 °C | 9.14 mm |
| February | -7.6 °C | 10.4 °C | 9.65 mm |
| March | -3 °C | 16.3 °C | 20.57 mm |
| April | 1.8 °C | 20.3 °C | 33.78 mm |
| May | 7.7 °C | 25.6 °C | 41.91 mm |
| June | 13.7 °C | 31.8 °C | 37.59 mm |
| July | 16.3 °C | 34.2 °C | 55.63 mm |
| August | 15.3 °C | 32.9 °C | 46.23 mm |
| September | 10.1 °C | 29 °C | 19.81 mm |
| October | 2.2 °C | 21.9 °C | 27.43 mm |
| November | -4.4 °C | 14.4 °C | 10.67 mm |
| December | -9.2 °C | 8.6 °C | 10.41 mm |
| Annual | 2.8 °C | 21.2 °C | 322.82 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |