Deerfield, Kansas has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 4.5 °C (low) to 20.4 °C (high). Annual precipitation averages 478 Millimeters. Deerfield 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 | -7.9 °C | 7.3 °C | 11.18 mm |
| February | -6.4 °C | 9.6 °C | 11.43 mm |
| March | -1.9 °C | 14.9 °C | 28.96 mm |
| April | 2.8 °C | 19.6 °C | 39.37 mm |
| May | 9.2 °C | 25.1 °C | 64.77 mm |
| June | 15.3 °C | 31.1 °C | 69.34 mm |
| July | 18.1 °C | 33.7 °C | 73.91 mm |
| August | 17.1 °C | 32.2 °C | 70.1 mm |
| September | 12.2 °C | 28.5 °C | 33.78 mm |
| October | 4.5 °C | 21.4 °C | 41.4 mm |
| November | -2.4 °C | 13.7 °C | 14.99 mm |
| December | -7.1 °C | 7.8 °C | 18.8 mm |
| Annual | 4.5 °C | 20.4 °C | 478.03 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 | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |