Horace, Kansas has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 3.3 °C (low) to 19.6 °C (high). Annual precipitation averages 466.6 Millimeters. Horace 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 | -8.6 °C | 6.9 °C | 10.41 mm |
| February | -7.3 °C | 8.6 °C | 12.95 mm |
| March | -2.9 °C | 14.1 °C | 24.64 mm |
| April | 1.7 °C | 18.4 °C | 41.4 mm |
| May | 7.9 °C | 23.9 °C | 57.15 mm |
| June | 13.9 °C | 30.3 °C | 69.34 mm |
| July | 16.7 °C | 32.9 °C | 83.57 mm |
| August | 15.7 °C | 31.4 °C | 71.37 mm |
| September | 10.9 °C | 27.7 °C | 29.97 mm |
| October | 2.9 °C | 20.4 °C | 39.12 mm |
| November | -3.3 °C | 12.8 °C | 13.21 mm |
| December | -7.9 °C | 7.2 °C | 13.46 mm |
| Annual | 3.3 °C | 19.6 °C | 466.59 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| 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 | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |