Greenleaf, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.6 °C (low) to 18 °C (high). Annual precipitation averages 815.6 Millimeters. Greenleaf 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 | -8.2 °C | 3.1 °C | 18.29 mm |
| February | -6.3 °C | 5.7 °C | 26.42 mm |
| March | -0.7 °C | 12.3 °C | 48.51 mm |
| April | 4.8 °C | 18 °C | 76.96 mm |
| May | 11.2 °C | 23.4 °C | 120.14 mm |
| June | 16.9 °C | 28.9 °C | 115.57 mm |
| July | 19.4 °C | 31.7 °C | 111.76 mm |
| August | 18.2 °C | 30.6 °C | 91.95 mm |
| September | 13 °C | 26.6 °C | 79.25 mm |
| October | 6.1 °C | 19.8 °C | 62.48 mm |
| November | -0.8 °C | 11.5 °C | 36.58 mm |
| December | -6 °C | 4.9 °C | 27.69 mm |
| Annual | 5.6 °C | 18 °C | 815.6 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 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |