Radium, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44 °F (low) to 67.9 °F (high). Annual precipitation averages 26.9 Inches. Radium 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 | 21.2 °F | 43.1 °F | 0.74 in. |
| February | 23.9 °F | 47.5 °F | 0.94 in. |
| March | 32.9 °F | 57.7 °F | 1.76 in. |
| April | 42.0 °F | 66.9 °F | 2.3 in. |
| May | 53.1 °F | 76.4 °F | 4.39 in. |
| June | 63.4 °F | 87.4 °F | 3.7 in. |
| July | 67.7 °F | 91.7 °F | 3.63 in. |
| August | 65.8 °F | 89.8 °F | 3.52 in. |
| September | 58.0 °F | 82.7 °F | 1.92 in. |
| October | 44.6 °F | 70.2 °F | 2.08 in. |
| November | 32.2 °F | 56.5 °F | 1.04 in. |
| December | 23.1 °F | 44.5 °F | 0.92 in. |
| Annual | 44 °F | 67.9 °F | 26.94 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 6b : -5°F to 0°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |