Ransom, Kansas has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 4.4 °C (low) to 19.8 °C (high). Annual precipitation averages 573 Millimeters. Ransom 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 | -8.2 °C | 6.2 °C | 12.7 mm |
| February | -6.7 °C | 8.4 °C | 15.75 mm |
| March | -2.3 °C | 13.9 °C | 32.51 mm |
| April | 2.8 °C | 19 °C | 49.53 mm |
| May | 9.2 °C | 24.3 °C | 82.8 mm |
| June | 15.4 °C | 30.6 °C | 82.3 mm |
| July | 18.3 °C | 33.4 °C | 90.17 mm |
| August | 17.2 °C | 32.1 °C | 76.45 mm |
| September | 12.2 °C | 28.1 °C | 43.43 mm |
| October | 4.6 °C | 21.1 °C | 43.43 mm |
| November | -2.2 °C | 13.2 °C | 21.59 mm |
| December | -7.2 °C | 6.9 °C | 22.35 mm |
| Annual | 4.4 °C | 19.8 °C | 573.01 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |