Sylvan Grove, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.2 °F (low) to 67.3 °F (high). Annual precipitation averages 27.8 Inches. Sylvan Grove 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.1 °F | 41.0 °F | 0.62 in. |
| February | 21.2 °F | 45.8 °F | 0.88 in. |
| March | 30.5 °F | 56.9 °F | 1.43 in. |
| April | 39.9 °F | 66.8 °F | 2.31 in. |
| May | 51.5 °F | 76.2 °F | 4.38 in. |
| June | 62.5 °F | 87.2 °F | 3.68 in. |
| July | 67.3 °F | 92.7 °F | 4.27 in. |
| August | 65.1 °F | 90.1 °F | 3.82 in. |
| September | 56.1 °F | 82.3 °F | 2.34 in. |
| October | 43.0 °F | 69.8 °F | 1.94 in. |
| November | 30.4 °F | 55.2 °F | 1.1 in. |
| December | 21.3 °F | 43.2 °F | 1.01 in. |
| Annual | 42.2 °F | 67.3 °F | 27.78 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 6b : -5°F to 0°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 |