Liberal, Missouri has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.1 °C (low) to 19.8 °C (high). Annual precipitation averages 1167.4 Millimeters. Liberal 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 | -4.7 °C | 5.9 °C | 43.18 mm |
| February | -2.7 °C | 8.9 °C | 49.53 mm |
| March | 2.1 °C | 14.4 °C | 81.03 mm |
| April | 7.5 °C | 19.8 °C | 124.71 mm |
| May | 13.3 °C | 24.4 °C | 168.91 mm |
| June | 18.4 °C | 29.4 °C | 146.3 mm |
| July | 20.7 °C | 32.1 °C | 111.76 mm |
| August | 19.6 °C | 31.8 °C | 94.23 mm |
| September | 14.8 °C | 27.5 °C | 117.09 mm |
| October | 8.3 °C | 21.3 °C | 92.96 mm |
| November | 2.2 °C | 14.1 °C | 77.47 mm |
| December | -2.7 °C | 7.9 °C | 60.2 mm |
| Annual | 8.1 °C | 19.8 °C | 1167.37 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 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 |