Isabel, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.1 °C (low) to 20.1 °C (high). Annual precipitation averages 750.8 Millimeters. Isabel 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.4 °C | 6.8 °C | 19.56 mm |
| February | -4.1 °C | 9.1 °C | 26.92 mm |
| March | 1.1 °C | 14.4 °C | 52.83 mm |
| April | 5.9 °C | 19.7 °C | 64.26 mm |
| May | 12.1 °C | 24.8 °C | 109.22 mm |
| June | 17.6 °C | 30.5 °C | 108.2 mm |
| July | 20.1 °C | 33.2 °C | 89.92 mm |
| August | 19.1 °C | 32.2 °C | 91.69 mm |
| September | 14.6 °C | 28.1 °C | 61.72 mm |
| October | 7.4 °C | 21.5 °C | 65.02 mm |
| November | 0.7 °C | 13.8 °C | 32.26 mm |
| December | -4.2 °C | 7.5 °C | 29.21 mm |
| Annual | 7.1 °C | 20.1 °C | 750.81 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |