Weskan, Kansas has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 3.1 °C (low) to 19 °C (high). Annual precipitation averages 452.1 Millimeters. Weskan is located in USDA Plant Hardiness Zone 6a. 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 | -8.4 °C | 6.7 °C | 8.13 mm |
| February | -7.3 °C | 8.1 °C | 11.18 mm |
| March | -3.2 °C | 13.5 °C | 21.59 mm |
| April | 1.3 °C | 17.9 °C | 39.62 mm |
| May | 7.4 °C | 23.1 °C | 60.45 mm |
| June | 13.4 °C | 29.5 °C | 66.55 mm |
| July | 16.3 °C | 32.5 °C | 82.3 mm |
| August | 15.3 °C | 30.9 °C | 71.88 mm |
| September | 10.5 °C | 27.1 °C | 33.53 mm |
| October | 2.8 °C | 19.8 °C | 33.27 mm |
| November | -3.4 °C | 12.3 °C | 12.45 mm |
| December | -7.9 °C | 6.9 °C | 11.18 mm |
| Annual | 3.1 °C | 19 °C | 452.13 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |