Friendswood, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 61.5 °F (low) to 78.9 °F (high). Annual precipitation averages 57.2 Inches. Friendswood is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 44.7 °F | 63.0 °F | 4.56 in. |
| February | 48.4 °F | 66.4 °F | 3.17 in. |
| March | 54.8 °F | 72.0 °F | 3.41 in. |
| April | 61.1 °F | 78.1 °F | 4.41 in. |
| May | 68.7 °F | 84.7 °F | 4.99 in. |
| June | 74.5 °F | 90.1 °F | 5.49 in. |
| July | 76.1 °F | 92.0 °F | 4.6 in. |
| August | 76.0 °F | 92.8 °F | 5.96 in. |
| September | 71.9 °F | 88.7 °F | 5.76 in. |
| October | 62.6 °F | 81.6 °F | 5.59 in. |
| November | 53.0 °F | 71.9 °F | 4.76 in. |
| December | 46.7 °F | 64.9 °F | 4.54 in. |
| Annual | 61.5 °F | 78.9 °F | 57.24 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 |