Wylie, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 54.8 °F (low) to 76 °F (high). Annual precipitation averages 40.8 Inches. Wylie 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 | 34.7 °F | 55.6 °F | 2.67 in. |
| February | 38.4 °F | 59.9 °F | 2.87 in. |
| March | 45.9 °F | 67.4 °F | 3.72 in. |
| April | 53.6 °F | 75.1 °F | 3.52 in. |
| May | 62.9 °F | 82.4 °F | 4.88 in. |
| June | 70.9 °F | 90.5 °F | 4.0 in. |
| July | 74.0 °F | 94.6 °F | 2.06 in. |
| August | 73.5 °F | 95.2 °F | 2.3 in. |
| September | 66.4 °F | 88.6 °F | 3.12 in. |
| October | 55.1 °F | 78.6 °F | 4.62 in. |
| November | 44.9 °F | 66.5 °F | 3.41 in. |
| December | 36.9 °F | 57.7 °F | 3.64 in. |
| Annual | 54.8 °F | 76 °F | 40.81 in. |
| 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 : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |