Clayton, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 38.4 °F (low) to 66 °F (high). Annual precipitation averages 21.4 Inches. Clayton is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 15.5 °F | 41.0 °F | 0.34 in. |
| February | 18.0 °F | 44.6 °F | 0.42 in. |
| March | 26.5 °F | 55.7 °F | 1.01 in. |
| April | 35.9 °F | 64.9 °F | 1.94 in. |
| May | 47.6 °F | 74.5 °F | 3.49 in. |
| June | 58.6 °F | 86.1 °F | 2.87 in. |
| July | 64.1 °F | 91.3 °F | 3.51 in. |
| August | 61.7 °F | 88.8 °F | 3.01 in. |
| September | 52.0 °F | 81.2 °F | 1.85 in. |
| October | 38.1 °F | 67.9 °F | 1.7 in. |
| November | 25.4 °F | 54.0 °F | 0.68 in. |
| December | 17.1 °F | 42.3 °F | 0.59 in. |
| Annual | 38.4 °F | 66 °F | 21.41 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |