Wellington, Kansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.9 °C (low) to 20.5 °C (high). Annual precipitation averages 893.8 Millimeters. Wellington 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 | -5.3 °C | 6.6 °C | 23.11 mm |
| February | -3.4 °C | 9.4 °C | 34.8 mm |
| March | 1.6 °C | 14.9 °C | 61.72 mm |
| April | 6.8 °C | 20.3 °C | 80.52 mm |
| May | 13.1 °C | 25.2 °C | 126.75 mm |
| June | 18.6 °C | 30.7 °C | 140.46 mm |
| July | 21.1 °C | 33.5 °C | 101.09 mm |
| August | 20.1 °C | 32.8 °C | 95.5 mm |
| September | 15.4 °C | 28.5 °C | 73.91 mm |
| October | 8.4 °C | 21.9 °C | 77.98 mm |
| November | 1.7 °C | 14.3 °C | 43.43 mm |
| December | -3.7 °C | 7.7 °C | 34.54 mm |
| Annual | 7.9 °C | 20.5 °C | 893.81 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 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |