La Harpe, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 45.1 °F (low) to 66.6 °F (high). Annual precipitation averages 42.6 Inches. La Harpe 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 | 21.1 °F | 41.8 °F | 1.34 in. |
| February | 24.7 °F | 46.4 °F | 1.67 in. |
| March | 33.9 °F | 57.1 °F | 2.85 in. |
| April | 43.7 °F | 66.8 °F | 4.43 in. |
| May | 54.9 °F | 74.8 °F | 5.92 in. |
| June | 64.4 °F | 84.1 °F | 5.5 in. |
| July | 68.6 °F | 88.8 °F | 4.45 in. |
| August | 66.5 °F | 88.1 °F | 4.16 in. |
| September | 58.1 °F | 80.9 °F | 4.38 in. |
| October | 45.6 °F | 69.2 °F | 3.61 in. |
| November | 34.3 °F | 56.3 °F | 2.41 in. |
| December | 25.0 °F | 44.7 °F | 1.83 in. |
| Annual | 45.1 °F | 66.6 °F | 42.55 in. |
| 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 : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |