League City, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 61.6 °F (low) to 78.6 °F (high). Annual precipitation averages 59.2 Inches. League City is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 44.7 °F | 62.9 °F | 4.67 in. |
| February | 48.5 °F | 66.3 °F | 3.11 in. |
| March | 54.8 °F | 71.7 °F | 3.32 in. |
| April | 61.1 °F | 77.8 °F | 4.49 in. |
| May | 68.8 °F | 84.3 °F | 5.08 in. |
| June | 74.5 °F | 89.7 °F | 5.96 in. |
| July | 76.1 °F | 91.7 °F | 4.53 in. |
| August | 75.8 °F | 92.4 °F | 6.51 in. |
| September | 71.8 °F | 88.4 °F | 6.37 in. |
| October | 63.4 °F | 81.3 °F | 5.65 in. |
| November | 53.2 °F | 71.6 °F | 4.91 in. |
| December | 46.6 °F | 65.0 °F | 4.58 in. |
| Annual | 61.6 °F | 78.6 °F | 59.18 in. |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9a : 20°F to 25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |