Wellington, Utah has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.3 °C (low) to 17.8 °C (high). Annual precipitation averages 228.6 Millimeters. Wellington is located in USDA Plant Hardiness Zone 6a. 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 | -11.2 °C | 2.8 °C | 17.02 mm |
| February | -7.6 °C | 6.3 °C | 15.24 mm |
| March | -3.3 °C | 12.6 °C | 16.26 mm |
| April | 0.1 °C | 17.2 °C | 15.49 mm |
| May | 4.7 °C | 22.6 °C | 21.59 mm |
| June | 10.7 °C | 29.1 °C | 14.48 mm |
| July | 14.5 °C | 32.8 °C | 17.53 mm |
| August | 12.3 °C | 31.3 °C | 25.65 mm |
| September | 9.3 °C | 26.4 °C | 32 mm |
| October | 1.1 °C | 18.6 °C | 25.4 mm |
| November | -5.4 °C | 10.3 °C | 13.21 mm |
| December | -10.2 °C | 3.1 °C | 14.73 mm |
| Annual | 1.3 °C | 17.8 °C | 228.6 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |