Iredell, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.8 °C (low) to 25.4 °C (high). Annual precipitation averages 907.3 Millimeters. Iredell 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 | 0.7 °C | 14.7 °C | 57.4 mm |
| February | 2.8 °C | 16.9 °C | 61.72 mm |
| March | 7.1 °C | 20.9 °C | 79.76 mm |
| April | 11.2 °C | 25.5 °C | 77.47 mm |
| May | 16.6 °C | 29.2 °C | 113.79 mm |
| June | 20.8 °C | 33.2 °C | 104.9 mm |
| July | 22.3 °C | 35.5 °C | 47.75 mm |
| August | 22.1 °C | 35.6 °C | 62.23 mm |
| September | 18.2 °C | 31.8 °C | 79.5 mm |
| October | 12.1 °C | 26.3 °C | 97.54 mm |
| November | 6.3 °C | 19.9 °C | 65.79 mm |
| December | 1.7 °C | 15.4 °C | 59.44 mm |
| Annual | 11.8 °C | 25.4 °C | 907.29 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 |