Ness City, Kansas has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 4.9 °C (low) to 20.2 °C (high). Annual precipitation averages 587.8 Millimeters. Ness City 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.8 °C | 6.7 °C | 13.46 mm |
| February | -6.5 °C | 8.8 °C | 17.53 mm |
| March | -1.7 °C | 14.3 °C | 36.58 mm |
| April | 3.3 °C | 19.4 °C | 50.29 mm |
| May | 9.8 °C | 24.8 °C | 81.79 mm |
| June | 16 °C | 31 °C | 80.26 mm |
| July | 18.7 °C | 33.8 °C | 97.28 mm |
| August | 17.6 °C | 32.5 °C | 81.03 mm |
| September | 12.7 °C | 28.4 °C | 45.97 mm |
| October | 4.9 °C | 21.4 °C | 43.69 mm |
| November | -1.9 °C | 13.6 °C | 18.29 mm |
| December | -6.8 °C | 7.2 °C | 21.59 mm |
| Annual | 4.9 °C | 20.2 °C | 587.76 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 | Abnormally Dry |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |