Hunnewell, Kansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.2 °C (low) to 21.3 °C (high). Annual precipitation averages 912.9 Millimeters. Hunnewell is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.8 °C | 7.8 °C | 27.94 mm |
| February | -3 °C | 10.4 °C | 35.05 mm |
| March | 2 °C | 15.9 °C | 66.04 mm |
| April | 7.1 °C | 21.2 °C | 89.66 mm |
| May | 13.3 °C | 25.9 °C | 128.27 mm |
| June | 18.8 °C | 31.2 °C | 127 mm |
| July | 21.3 °C | 33.9 °C | 102.62 mm |
| August | 20.3 °C | 33.4 °C | 93.98 mm |
| September | 15.7 °C | 29.3 °C | 72.9 mm |
| October | 8.7 °C | 22.7 °C | 84.58 mm |
| November | 2.1 °C | 15.3 °C | 46.48 mm |
| December | -3.3 °C | 8.8 °C | 38.35 mm |
| Annual | 8.2 °C | 21.3 °C | 912.87 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |