Effingham, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.3 °F (low) to 64.9 °F (high). Annual precipitation averages 37 Inches. Effingham is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.0 °F | 37.6 °F | 0.81 in. |
| February | 21.6 °F | 42.9 °F | 1.32 in. |
| March | 31.4 °F | 54.8 °F | 2.16 in. |
| April | 42.0 °F | 65.3 °F | 3.7 in. |
| May | 53.8 °F | 75.0 °F | 4.95 in. |
| June | 63.9 °F | 84.4 °F | 5.07 in. |
| July | 67.9 °F | 88.6 °F | 5.11 in. |
| August | 65.7 °F | 87.3 °F | 3.93 in. |
| September | 56.2 °F | 79.9 °F | 3.71 in. |
| October | 44.2 °F | 67.9 °F | 2.95 in. |
| November | 32.2 °F | 53.7 °F | 1.85 in. |
| December | 22.9 °F | 41.5 °F | 1.47 in. |
| Annual | 43.3 °F | 64.9 °F | 37.03 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |