Jennings, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 38.5 °F (low) to 66.1 °F (high). Annual precipitation averages 21.7 Inches. Jennings is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 15.8 °F | 41.5 °F | 0.39 in. |
| February | 18.2 °F | 44.9 °F | 0.53 in. |
| March | 26.6 °F | 55.9 °F | 1.08 in. |
| April | 36.0 °F | 64.9 °F | 2.03 in. |
| May | 47.5 °F | 74.5 °F | 3.4 in. |
| June | 58.5 °F | 86.0 °F | 2.84 in. |
| July | 64.1 °F | 91.3 °F | 3.58 in. |
| August | 61.7 °F | 88.7 °F | 3.06 in. |
| September | 52.2 °F | 81.2 °F | 1.81 in. |
| October | 38.2 °F | 67.9 °F | 1.64 in. |
| November | 25.8 °F | 54.2 °F | 0.74 in. |
| December | 17.4 °F | 42.7 °F | 0.63 in. |
| Annual | 38.5 °F | 66.1 °F | 21.73 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |