Omaha, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.7 °C (low) to 24.2 °C (high). Annual precipitation averages 1281.4 Millimeters. Omaha 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 | 1.1 °C | 13.2 °C | 93.98 mm |
| February | 2.8 °C | 15.3 °C | 111.76 mm |
| March | 6.9 °C | 19.7 °C | 119.13 mm |
| April | 10.9 °C | 23.8 °C | 112.78 mm |
| May | 16.2 °C | 28 °C | 131.57 mm |
| June | 20.4 °C | 31.9 °C | 106.43 mm |
| July | 22.2 °C | 34 °C | 93.22 mm |
| August | 21.6 °C | 34.4 °C | 69.6 mm |
| September | 18.1 °C | 31.2 °C | 107.44 mm |
| October | 11.4 °C | 25.4 °C | 119.63 mm |
| November | 6.2 °C | 19 °C | 99.82 mm |
| December | 2.2 °C | 14.2 °C | 116.08 mm |
| Annual | 11.7 °C | 24.2 °C | 1281.44 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |