Hillsboro, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.2 °F (low) to 66.8 °F (high). Annual precipitation averages 34.1 Inches. Hillsboro 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 20.0 °F | 41.0 °F | 0.77 in. |
| February | 23.3 °F | 45.6 °F | 1.32 in. |
| March | 32.9 °F | 56.5 °F | 2.19 in. |
| April | 42.5 °F | 66.2 °F | 3.02 in. |
| May | 53.8 °F | 75.7 °F | 5.12 in. |
| June | 64.0 °F | 86.1 °F | 4.55 in. |
| July | 68.3 °F | 91.1 °F | 4.43 in. |
| August | 66.4 °F | 89.6 °F | 3.96 in. |
| September | 57.8 °F | 81.8 °F | 3.43 in. |
| October | 45.0 °F | 69.5 °F | 2.43 in. |
| November | 32.8 °F | 55.3 °F | 1.58 in. |
| December | 23.4 °F | 43.4 °F | 1.26 in. |
| Annual | 44.2 °F | 66.8 °F | 34.06 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |