Kosse, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13.3 °C (low) to 25.5 °C (high). Annual precipitation averages 1020.6 Millimeters. Kosse is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 2.9 °C | 15.1 °C | 82.04 mm |
| February | 5 °C | 17.3 °C | 73.41 mm |
| March | 8.6 °C | 21 °C | 92.46 mm |
| April | 12.7 °C | 25.2 °C | 84.33 mm |
| May | 17.6 °C | 28.9 °C | 115.32 mm |
| June | 21.5 °C | 32.8 °C | 91.44 mm |
| July | 23 °C | 35 °C | 49.53 mm |
| August | 22.8 °C | 35.4 °C | 67.31 mm |
| September | 19.3 °C | 32.2 °C | 82.8 mm |
| October | 13.6 °C | 26.8 °C | 108.2 mm |
| November | 8.3 °C | 20.6 °C | 81.79 mm |
| December | 3.9 °C | 15.9 °C | 91.95 mm |
| Annual | 13.3 °C | 25.5 °C | 1020.58 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |