Meridian, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.3 °C (low) to 25.5 °C (high). Annual precipitation averages 947.9 Millimeters. Meridian is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.3 °C | 14.7 °C | 60.96 mm |
| February | 3.4 °C | 16.9 °C | 63.75 mm |
| March | 7.6 °C | 20.8 °C | 80.77 mm |
| April | 11.7 °C | 25.2 °C | 87.88 mm |
| May | 16.9 °C | 29.2 °C | 111.51 mm |
| June | 21.1 °C | 33.2 °C | 106.93 mm |
| July | 22.7 °C | 35.6 °C | 49.53 mm |
| August | 22.5 °C | 35.8 °C | 67.56 mm |
| September | 18.7 °C | 32.2 °C | 82.3 mm |
| October | 12.7 °C | 26.6 °C | 97.79 mm |
| November | 6.9 °C | 20.1 °C | 73.41 mm |
| December | 2.3 °C | 15.4 °C | 65.53 mm |
| Annual | 12.3 °C | 25.5 °C | 947.92 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |