Oologah, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47.6 °F (low) to 70.6 °F (high). Annual precipitation averages 42.5 Inches. Oologah is located in USDA Plant Hardiness Zone 7a. 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 | 24.9 °F | 47.2 °F | 1.77 in. |
| February | 28.4 °F | 52.1 °F | 1.97 in. |
| March | 37.0 °F | 61.2 °F | 3.28 in. |
| April | 46.4 °F | 70.5 °F | 4.26 in. |
| May | 56.9 °F | 78.0 °F | 5.95 in. |
| June | 66.2 °F | 86.6 °F | 4.73 in. |
| July | 70.2 °F | 92.0 °F | 3.81 in. |
| August | 68.5 °F | 92.0 °F | 3.64 in. |
| September | 59.9 °F | 84.2 °F | 4.09 in. |
| October | 47.9 °F | 73.1 °F | 3.66 in. |
| November | 36.8 °F | 60.7 °F | 3.07 in. |
| December | 28.2 °F | 49.7 °F | 2.26 in. |
| Annual | 47.6 °F | 70.6 °F | 42.49 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 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |