Lyons, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 56.9 °F (low) to 79.5 °F (high). Annual precipitation averages 42 Inches. Lyons is located in USDA Plant Hardiness Zone 9a. 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 | 39.1 °F | 61.2 °F | 3.29 in. |
| February | 42.8 °F | 64.8 °F | 2.83 in. |
| March | 49.3 °F | 71.7 °F | 3.28 in. |
| April | 56.3 °F | 78.9 °F | 3.26 in. |
| May | 64.6 °F | 85.8 °F | 4.88 in. |
| June | 71.2 °F | 92.4 °F | 3.9 in. |
| July | 73.3 °F | 95.3 °F | 1.91 in. |
| August | 73.0 °F | 96.7 °F | 3.24 in. |
| September | 67.6 °F | 91.2 °F | 3.4 in. |
| October | 57.5 °F | 82.2 °F | 4.69 in. |
| November | 47.8 °F | 71.1 °F | 3.7 in. |
| December | 40.7 °F | 63.1 °F | 3.6 in. |
| Annual | 56.9 °F | 79.5 °F | 41.98 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 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |