Melissa, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.5 °C (low) to 24.1 °C (high). Annual precipitation averages 1071.4 Millimeters. Melissa is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.1 °C | 12.6 °C | 63.25 mm |
| February | 3.1 °C | 15 °C | 76.71 mm |
| March | 7.3 °C | 19.2 °C | 98.04 mm |
| April | 11.6 °C | 23.6 °C | 102.11 mm |
| May | 16.9 °C | 27.7 °C | 130.3 mm |
| June | 21.4 °C | 32.2 °C | 95 mm |
| July | 23.5 °C | 34.8 °C | 59.18 mm |
| August | 23.2 °C | 35.1 °C | 59.18 mm |
| September | 19.2 °C | 31.1 °C | 84.33 mm |
| October | 12.9 °C | 25.4 °C | 120.9 mm |
| November | 6.9 °C | 18.7 °C | 89.15 mm |
| December | 2.4 °C | 13.7 °C | 93.22 mm |
| Annual | 12.5 °C | 24.1 °C | 1071.37 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| 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 |