Caldwell, Kansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46.7 °F (low) to 70.3 °F (high). Annual precipitation averages 33.8 Inches. Caldwell is located in USDA Plant Hardiness Zone 7a. 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 | 23.5 °F | 45.8 °F | 1.08 in. |
| February | 26.7 °F | 50.3 °F | 1.3 in. |
| March | 35.6 °F | 60.2 °F | 2.53 in. |
| April | 44.6 °F | 69.8 °F | 3.19 in. |
| May | 55.9 °F | 78.7 °F | 4.67 in. |
| June | 65.9 °F | 88.6 °F | 4.73 in. |
| July | 70.3 °F | 93.6 °F | 3.99 in. |
| August | 68.5 °F | 92.2 °F | 3.45 in. |
| September | 60.3 °F | 84.8 °F | 2.64 in. |
| October | 47.6 °F | 72.6 °F | 3.12 in. |
| November | 35.7 °F | 59.3 °F | 1.67 in. |
| December | 26.1 °F | 47.4 °F | 1.45 in. |
| Annual | 46.7 °F | 70.3 °F | 33.82 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |