Rantoul, 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 40.3 Inches. Rantoul 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 | 21.2 °F | 41.0 °F | 1.21 in. |
| February | 24.6 °F | 45.2 °F | 1.59 in. |
| March | 34.0 °F | 56.8 °F | 2.41 in. |
| April | 44.0 °F | 66.9 °F | 3.94 in. |
| May | 55.0 °F | 75.5 °F | 5.74 in. |
| June | 64.7 °F | 84.7 °F | 5.49 in. |
| July | 68.5 °F | 89.7 °F | 4.06 in. |
| August | 66.6 °F | 88.7 °F | 4.17 in. |
| September | 57.6 °F | 81.1 °F | 4.4 in. |
| October | 45.6 °F | 69.7 °F | 3.38 in. |
| November | 34.4 °F | 55.9 °F | 2.22 in. |
| December | 25.1 °F | 44.1 °F | 1.67 in. |
| Annual | 45.1 °F | 66.6 °F | 40.28 in. |
| 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 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |