Isabel, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.7 °F (low) to 68.2 °F (high). Annual precipitation averages 29.6 Inches. 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 | 22.2 °F | 44.3 °F | 0.77 in. |
| February | 24.7 °F | 48.4 °F | 1.06 in. |
| March | 34.0 °F | 58.0 °F | 2.08 in. |
| April | 42.7 °F | 67.4 °F | 2.53 in. |
| May | 53.8 °F | 76.7 °F | 4.3 in. |
| June | 63.6 °F | 86.9 °F | 4.26 in. |
| July | 68.1 °F | 91.8 °F | 3.54 in. |
| August | 66.4 °F | 89.9 °F | 3.61 in. |
| September | 58.2 °F | 82.5 °F | 2.43 in. |
| October | 45.4 °F | 70.7 °F | 2.56 in. |
| November | 33.2 °F | 56.8 °F | 1.27 in. |
| December | 24.5 °F | 45.5 °F | 1.15 in. |
| Annual | 44.7 °F | 68.2 °F | 29.56 in. |
| 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 : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |