Richmond, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 60.1 °F (low) to 79.7 °F (high). Annual precipitation averages 52.4 Inches. Richmond is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 43.6 °F | 63.1 °F | 3.99 in. |
| February | 47.4 °F | 66.7 °F | 2.97 in. |
| March | 53.5 °F | 73.0 °F | 3.56 in. |
| April | 59.5 °F | 79.2 °F | 4.16 in. |
| May | 67.3 °F | 85.8 °F | 5.02 in. |
| June | 73.2 °F | 91.2 °F | 5.21 in. |
| July | 74.4 °F | 93.1 °F | 3.91 in. |
| August | 74.3 °F | 94.1 °F | 5.3 in. |
| September | 70.3 °F | 89.7 °F | 4.94 in. |
| October | 60.9 °F | 82.5 °F | 4.58 in. |
| November | 51.5 °F | 72.5 °F | 4.58 in. |
| December | 45.3 °F | 65.1 °F | 4.21 in. |
| Annual | 60.1 °F | 79.7 °F | 52.43 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 |