Sugar Land, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 16 °C (low) to 26.4 °C (high). Annual precipitation averages 1363.7 Millimeters. Sugar Land is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 6.9 °C | 17.2 °C | 104.9 mm |
| February | 8.9 °C | 19.2 °C | 77.98 mm |
| March | 12.2 °C | 22.7 °C | 92.71 mm |
| April | 15.6 °C | 26.2 °C | 107.7 mm |
| May | 19.9 °C | 29.8 °C | 131.83 mm |
| June | 23.2 °C | 32.8 °C | 135.89 mm |
| July | 23.9 °C | 33.8 °C | 101.6 mm |
| August | 23.9 °C | 34.3 °C | 141.48 mm |
| September | 21.6 °C | 31.9 °C | 130.3 mm |
| October | 16.6 °C | 28 °C | 117.09 mm |
| November | 11.2 °C | 22.4 °C | 115.57 mm |
| December | 7.8 °C | 18.3 °C | 106.68 mm |
| Annual | 16 °C | 26.4 °C | 1363.73 mm |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : -3.9°C to -1.1°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |