Inman, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.2 °C (low) to 19.6 °C (high). Annual precipitation averages 804.2 Millimeters. Inman is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.8 °C | 5.7 °C | 20.07 mm |
| February | -4.2 °C | 7.8 °C | 30.23 mm |
| March | 1.2 °C | 13.8 °C | 57.15 mm |
| April | 6.3 °C | 19.2 °C | 70.87 mm |
| May | 12.4 °C | 24.5 °C | 134.37 mm |
| June | 18.2 °C | 30.4 °C | 106.68 mm |
| July | 20.4 °C | 32.7 °C | 101.6 mm |
| August | 19.3 °C | 31.8 °C | 92.71 mm |
| September | 14.7 °C | 27.8 °C | 64.26 mm |
| October | 7.6 °C | 20.9 °C | 64.01 mm |
| November | 0.8 °C | 13.3 °C | 35.31 mm |
| December | -4.4 °C | 6.7 °C | 26.92 mm |
| Annual | 7.2 °C | 19.6 °C | 804.18 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |