Iowa Park, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.7 °C (low) to 24.7 °C (high). Annual precipitation averages 768.6 Millimeters. Iowa Park is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.1 °C | 12.6 °C | 31.75 mm |
| February | 0.6 °C | 15.1 °C | 37.59 mm |
| March | 5.2 °C | 19.8 °C | 58.93 mm |
| April | 9.6 °C | 24.7 °C | 75.95 mm |
| May | 15.6 °C | 29 °C | 101.09 mm |
| June | 20.4 °C | 33.6 °C | 86.61 mm |
| July | 22.6 °C | 36.2 °C | 58.42 mm |
| August | 21.9 °C | 36.2 °C | 64.52 mm |
| September | 17.6 °C | 31.8 °C | 79.5 mm |
| October | 11 °C | 25.9 °C | 77.98 mm |
| November | 4.8 °C | 18.7 °C | 49.78 mm |
| December | -0.2 °C | 13.3 °C | 46.48 mm |
| Annual | 10.7 °C | 24.7 °C | 768.6 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |