Lecompton, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.9 °C (low) to 18.5 °C (high). Annual precipitation averages 977.9 Millimeters. Lecompton is located in USDA Plant Hardiness Zone 6b. 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 °C | 3.7 °C | 26.16 mm |
| February | -4.8 °C | 6.5 °C | 33.78 mm |
| March | 0.6 °C | 12.9 °C | 61.21 mm |
| April | 6.4 °C | 18.6 °C | 100.33 mm |
| May | 12.6 °C | 23.8 °C | 134.37 mm |
| June | 18.2 °C | 29.2 °C | 136.4 mm |
| July | 20.4 °C | 31.7 °C | 108.46 mm |
| August | 19.2 °C | 31 °C | 113.79 mm |
| September | 14.2 °C | 26.6 °C | 94.49 mm |
| October | 7.2 °C | 19.9 °C | 78.23 mm |
| November | 0.7 °C | 12.3 °C | 51.31 mm |
| December | -4.8 °C | 5.6 °C | 39.37 mm |
| Annual | 6.9 °C | 18.5 °C | 977.9 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 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 |