Omaha, Arkansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47.8 °F (low) to 68.2 °F (high). Annual precipitation averages 45.7 Inches. Omaha is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 26.9 °F | 45.7 °F | 2.5 in. |
| February | 29.8 °F | 50.2 °F | 2.65 in. |
| March | 37.5 °F | 58.9 °F | 4.19 in. |
| April | 46.8 °F | 68.3 °F | 5.27 in. |
| May | 56.2 °F | 75.7 °F | 4.79 in. |
| June | 64.8 °F | 84.5 °F | 3.98 in. |
| July | 68.5 °F | 88.9 °F | 3.95 in. |
| August | 67.0 °F | 88.0 °F | 3.3 in. |
| September | 59.2 °F | 81.0 °F | 4.62 in. |
| October | 48.1 °F | 70.2 °F | 3.67 in. |
| November | 38.1 °F | 58.4 °F | 3.77 in. |
| December | 30.1 °F | 48.2 °F | 2.98 in. |
| Annual | 47.8 °F | 68.2 °F | 45.67 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |