Cullison, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7 °C (low) to 20.1 °C (high). Annual precipitation averages 705.9 Millimeters. Cullison is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.4 °C | 6.9 °C | 17.53 mm |
| February | -4.1 °C | 9.3 °C | 23.62 mm |
| March | 1.1 °C | 14.5 °C | 47.5 mm |
| April | 5.8 °C | 19.6 °C | 62.74 mm |
| May | 12 °C | 24.8 °C | 104.39 mm |
| June | 17.4 °C | 30.4 °C | 101.85 mm |
| July | 19.9 °C | 33.1 °C | 87.38 mm |
| August | 18.9 °C | 32 °C | 88.39 mm |
| September | 14.4 °C | 27.9 °C | 58.93 mm |
| October | 7.3 °C | 21.4 °C | 60.96 mm |
| November | 0.6 °C | 13.7 °C | 28.19 mm |
| December | -4.4 °C | 7.5 °C | 24.38 mm |
| Annual | 7 °C | 20.1 °C | 705.86 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |