Tecumseh, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7 °C (low) to 18.7 °C (high). Annual precipitation averages 950.5 Millimeters. Tecumseh 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 | -6.9 °C | 3.8 °C | 22.35 mm |
| February | -4.7 °C | 6.6 °C | 33.53 mm |
| March | 0.7 °C | 13 °C | 57.66 mm |
| April | 6.5 °C | 18.9 °C | 99.31 mm |
| May | 12.8 °C | 24.1 °C | 135.89 mm |
| June | 18.4 °C | 29.3 °C | 129.79 mm |
| July | 20.6 °C | 31.8 °C | 106.17 mm |
| August | 19.3 °C | 31.2 °C | 112.52 mm |
| September | 14.2 °C | 26.9 °C | 91.44 mm |
| October | 7.3 °C | 20.3 °C | 72.9 mm |
| November | 0.8 °C | 12.5 °C | 48.77 mm |
| December | -4.7 °C | 5.8 °C | 40.13 mm |
| Annual | 7 °C | 18.7 °C | 950.46 mm |
| 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 : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |