Bellaire, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 61.7 °F (low) to 79.2 °F (high). Annual precipitation averages 55.3 Inches. Bellaire is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 45.0 °F | 63.0 °F | 4.26 in. |
| February | 48.7 °F | 66.5 °F | 3.17 in. |
| March | 55.0 °F | 72.2 °F | 3.71 in. |
| April | 61.2 °F | 78.4 °F | 4.12 in. |
| May | 68.8 °F | 85.1 °F | 5.34 in. |
| June | 74.6 °F | 91.0 °F | 5.68 in. |
| July | 76.3 °F | 92.9 °F | 4.23 in. |
| August | 76.2 °F | 93.7 °F | 5.59 in. |
| September | 71.9 °F | 89.1 °F | 5.47 in. |
| October | 63.1 °F | 81.9 °F | 4.84 in. |
| November | 53.2 °F | 71.9 °F | 4.66 in. |
| December | 46.8 °F | 64.9 °F | 4.25 in. |
| Annual | 61.7 °F | 79.2 °F | 55.32 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 |