Lucas, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.5 °C (low) to 19.5 °C (high). Annual precipitation averages 693.2 Millimeters. Lucas 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 | -8 °C | 4.9 °C | 16 mm |
| February | -6.2 °C | 7.6 °C | 21.84 mm |
| March | -1.1 °C | 13.7 °C | 35.56 mm |
| April | 4.1 °C | 19.2 °C | 57.91 mm |
| May | 10.7 °C | 24.4 °C | 107.7 mm |
| June | 16.8 °C | 30.6 °C | 93.22 mm |
| July | 19.6 °C | 33.6 °C | 107.19 mm |
| August | 18.2 °C | 32.2 °C | 94.49 mm |
| September | 13.3 °C | 27.8 °C | 59.44 mm |
| October | 5.8 °C | 20.9 °C | 47.75 mm |
| November | -1.1 °C | 12.8 °C | 27.94 mm |
| December | -6.2 °C | 6.1 °C | 24.13 mm |
| Annual | 5.5 °C | 19.5 °C | 693.17 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 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |