Osceola, Arkansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.6 °C (low) to 21.6 °C (high). Annual precipitation averages 1345.2 Millimeters. Osceola 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. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.2 °C | 8.1 °C | 99.57 mm |
| February | 0.7 °C | 11.1 °C | 107.95 mm |
| March | 4.9 °C | 16.1 °C | 132.33 mm |
| April | 10.2 °C | 22 °C | 138.68 mm |
| May | 16.1 °C | 26.9 °C | 136.65 mm |
| June | 20.6 °C | 31.4 °C | 104.65 mm |
| July | 22.2 °C | 32.6 °C | 108.2 mm |
| August | 20.9 °C | 32.1 °C | 78.49 mm |
| September | 16.8 °C | 29.2 °C | 91.95 mm |
| October | 10.2 °C | 23.4 °C | 94.74 mm |
| November | 4.7 °C | 15.8 °C | 117.09 mm |
| December | 0.7 °C | 10.2 °C | 134.87 mm |
| Annual | 10.6 °C | 21.6 °C | 1345.17 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| 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 |