Sedgwick, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 2 °C (low) to 18.3 °C (high). Annual precipitation averages 430.8 Millimeters. Sedgwick is located in USDA Plant Hardiness Zone 5b. 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 | -9.7 °C | 5.4 °C | 6.1 mm |
| February | -8.4 °C | 6.9 °C | 10.41 mm |
| March | -3.9 °C | 12.6 °C | 25.65 mm |
| April | 0.7 °C | 17.1 °C | 45.72 mm |
| May | 6.6 °C | 22.2 °C | 69.09 mm |
| June | 12.5 °C | 28.7 °C | 72.14 mm |
| July | 15.8 °C | 32.3 °C | 64.01 mm |
| August | 14.5 °C | 31.1 °C | 53.59 mm |
| September | 9.1 °C | 26.9 °C | 35.56 mm |
| October | 1.4 °C | 19 °C | 30.23 mm |
| November | -4.9 °C | 11.7 °C | 10.41 mm |
| December | -9.6 °C | 5.7 °C | 7.87 mm |
| Annual | 2 °C | 18.3 °C | 430.78 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 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |