Dexter, Kansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 45.9 °F (low) to 69 °F (high). Annual precipitation averages 40.5 Inches. Dexter 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 | 22.2 °F | 45.0 °F | 1.08 in. |
| February | 25.5 °F | 49.5 °F | 1.54 in. |
| March | 34.7 °F | 59.6 °F | 2.69 in. |
| April | 44.5 °F | 68.9 °F | 4.06 in. |
| May | 55.5 °F | 77.0 °F | 6.36 in. |
| June | 65.2 °F | 86.1 °F | 5.98 in. |
| July | 69.4 °F | 91.3 °F | 4.07 in. |
| August | 67.6 °F | 90.4 °F | 4.43 in. |
| September | 59.4 °F | 82.9 °F | 3.11 in. |
| October | 46.7 °F | 71.4 °F | 3.4 in. |
| November | 35.0 °F | 58.7 °F | 2.19 in. |
| December | 25.3 °F | 46.9 °F | 1.59 in. |
| Annual | 45.9 °F | 69 °F | 40.5 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |