Eureka, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.9 °C (low) to 19.8 °C (high). Annual precipitation averages 976.6 Millimeters. 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 | -6.6 °C | 5.9 °C | 23.88 mm |
| February | -4.5 °C | 8.7 °C | 36.07 mm |
| March | 0.8 °C | 14.5 °C | 64.01 mm |
| April | 6.4 °C | 19.9 °C | 92.46 mm |
| May | 12.4 °C | 24.3 °C | 144.53 mm |
| June | 17.8 °C | 29.3 °C | 138.94 mm |
| July | 20.1 °C | 32.3 °C | 104.65 mm |
| August | 19 °C | 32 °C | 93.22 mm |
| September | 14.2 °C | 27.8 °C | 99.31 mm |
| October | 7.2 °C | 21.4 °C | 82.8 mm |
| November | 0.7 °C | 14 °C | 57.15 mm |
| December | -4.6 °C | 7.5 °C | 39.62 mm |
| Annual | 6.9 °C | 19.8 °C | 976.64 mm |
| 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 : -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 |