Lavon, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.5 °C (low) to 24.4 °C (high). Annual precipitation averages 1034.8 Millimeters. Lavon 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 | 1.4 °C | 13.1 °C | 67.82 mm |
| February | 3.4 °C | 15.4 °C | 73.15 mm |
| March | 7.6 °C | 19.6 °C | 95.76 mm |
| April | 11.8 °C | 23.8 °C | 89.92 mm |
| May | 17 °C | 27.9 °C | 121.67 mm |
| June | 21.4 °C | 32.5 °C | 100.84 mm |
| July | 23.1 °C | 34.7 °C | 51.05 mm |
| August | 22.8 °C | 35.1 °C | 59.18 mm |
| September | 18.9 °C | 31.4 °C | 78.23 mm |
| October | 12.7 °C | 25.8 °C | 116.33 mm |
| November | 7.1 °C | 19.2 °C | 88.39 mm |
| December | 2.6 °C | 14.2 °C | 92.46 mm |
| Annual | 12.5 °C | 24.4 °C | 1034.8 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 40-50 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 |