Milton, Kansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.9 °C (low) to 20.3 °C (high). Annual precipitation averages 843 Millimeters. Milton 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 | -4.9 °C | 6.4 °C | 21.84 mm |
| February | -3.1 °C | 9 °C | 32.77 mm |
| March | 1.7 °C | 14.6 °C | 58.42 mm |
| April | 6.7 °C | 19.8 °C | 78.74 mm |
| May | 12.9 °C | 25.1 °C | 124.71 mm |
| June | 18.4 °C | 30.8 °C | 125.73 mm |
| July | 20.8 °C | 33.5 °C | 99.31 mm |
| August | 19.9 °C | 32.6 °C | 93.47 mm |
| September | 15.5 °C | 28.4 °C | 64.26 mm |
| October | 8.6 °C | 21.7 °C | 74.68 mm |
| November | 1.8 °C | 13.9 °C | 37.34 mm |
| December | -3.4 °C | 7.4 °C | 31.75 mm |
| Annual | 7.9 °C | 20.3 °C | 843.02 mm |
| 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 : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |