Circleville, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.9 °F (low) to 64.8 °F (high). Annual precipitation averages 36 Inches. Circleville is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.7 °F | 37.5 °F | 0.75 in. |
| February | 21.3 °F | 42.6 °F | 1.16 in. |
| March | 31.2 °F | 54.5 °F | 2.2 in. |
| April | 41.6 °F | 65.3 °F | 3.65 in. |
| May | 53.5 °F | 74.8 °F | 5.27 in. |
| June | 63.6 °F | 84.1 °F | 4.96 in. |
| July | 67.4 °F | 88.4 °F | 4.54 in. |
| August | 65.2 °F | 87.3 °F | 4.1 in. |
| September | 56.0 °F | 79.9 °F | 3.52 in. |
| October | 43.6 °F | 68.0 °F | 2.86 in. |
| November | 31.8 °F | 53.6 °F | 1.72 in. |
| December | 22.2 °F | 41.2 °F | 1.24 in. |
| Annual | 42.9 °F | 64.8 °F | 35.97 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°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 |