Red Oak, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 49.8 °F (low) to 73.5 °F (high). Annual precipitation averages 49.3 Inches. Red Oak is located in USDA Plant Hardiness Zone 7b. 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 | 28.4 °F | 51.5 °F | 2.84 in. |
| February | 32.1 °F | 55.9 °F | 2.85 in. |
| March | 40.3 °F | 64.4 °F | 4.02 in. |
| April | 48.5 °F | 73.5 °F | 5.14 in. |
| May | 58.6 °F | 80.4 °F | 5.77 in. |
| June | 67.1 °F | 88.7 °F | 4.46 in. |
| July | 71.0 °F | 93.9 °F | 3.9 in. |
| August | 69.3 °F | 93.9 °F | 3.43 in. |
| September | 61.6 °F | 86.5 °F | 4.43 in. |
| October | 49.8 °F | 75.8 °F | 4.25 in. |
| November | 39.6 °F | 63.9 °F | 4.41 in. |
| December | 31.2 °F | 53.8 °F | 3.77 in. |
| Annual | 49.8 °F | 73.5 °F | 49.27 in. |
| 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 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |