Eureka, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.5 °F (low) to 67.7 °F (high). Annual precipitation averages 38.5 Inches. Eureka is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 20.2 °F | 42.6 °F | 0.94 in. |
| February | 23.9 °F | 47.7 °F | 1.42 in. |
| March | 33.4 °F | 58.1 °F | 2.52 in. |
| April | 43.5 °F | 67.9 °F | 3.64 in. |
| May | 54.4 °F | 75.7 °F | 5.69 in. |
| June | 64.1 °F | 84.8 °F | 5.47 in. |
| July | 68.2 °F | 90.2 °F | 4.12 in. |
| August | 66.2 °F | 89.6 °F | 3.67 in. |
| September | 57.6 °F | 82.0 °F | 3.91 in. |
| October | 44.9 °F | 70.5 °F | 3.26 in. |
| November | 33.3 °F | 57.2 °F | 2.25 in. |
| December | 23.8 °F | 45.5 °F | 1.56 in. |
| Annual | 44.5 °F | 67.7 °F | 38.45 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |