Ulysses, Kansas has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 4.6 °C (low) to 20.8 °C (high). Annual precipitation averages 457.2 Millimeters. Ulysses is located in USDA Plant Hardiness Zone 6b. 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 | -7.6 °C | 7.9 °C | 11.43 mm |
| February | -6 °C | 10.2 °C | 7.62 mm |
| March | -1.8 °C | 15.4 °C | 25.65 mm |
| April | 3.1 °C | 20.2 °C | 35.81 mm |
| May | 9.3 °C | 25.6 °C | 55.63 mm |
| June | 15.4 °C | 31.5 °C | 71.12 mm |
| July | 18.1 °C | 33.7 °C | 69.09 mm |
| August | 17.1 °C | 32.3 °C | 78.23 mm |
| September | 12.4 °C | 28.7 °C | 35.31 mm |
| October | 4.7 °C | 21.7 °C | 40.39 mm |
| November | -2.1 °C | 14.2 °C | 12.45 mm |
| December | -6.9 °C | 8.1 °C | 14.48 mm |
| Annual | 4.6 °C | 20.8 °C | 457.21 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 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |