Wellington, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.9 °C (low) to 18 °C (high). Annual precipitation averages 1071.1 Millimeters. Wellington is located in USDA Plant Hardiness Zone 6a. 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 | -7.9 °C | 3 °C | 36.07 mm |
| February | -5.6 °C | 6 °C | 46.23 mm |
| March | -0.3 °C | 12.2 °C | 66.8 mm |
| April | 5.4 °C | 18.3 °C | 105.92 mm |
| May | 11.4 °C | 23.7 °C | 142.24 mm |
| June | 17 °C | 28.4 °C | 137.92 mm |
| July | 19.2 °C | 30.7 °C | 122.94 mm |
| August | 17.7 °C | 30.3 °C | 110.24 mm |
| September | 12.9 °C | 26.1 °C | 111.25 mm |
| October | 6.2 °C | 19.7 °C | 87.38 mm |
| November | 0.1 °C | 11.7 °C | 60.71 mm |
| December | -5.2 °C | 5.3 °C | 43.43 mm |
| Annual | 5.9 °C | 18 °C | 1071.13 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 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |