Seminole, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 49.1 °F (low) to 72.8 °F (high). Annual precipitation averages 41.8 Inches. Seminole 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 | 27.1 °F | 50.6 °F | 1.73 in. |
| February | 31.0 °F | 55.1 °F | 2.22 in. |
| March | 39.5 °F | 63.9 °F | 2.96 in. |
| April | 47.8 °F | 72.8 °F | 4.18 in. |
| May | 57.8 °F | 79.6 °F | 5.57 in. |
| June | 66.8 °F | 87.9 °F | 4.96 in. |
| July | 70.4 °F | 93.6 °F | 3.82 in. |
| August | 69.1 °F | 93.8 °F | 3.28 in. |
| September | 61.0 °F | 85.8 °F | 4.36 in. |
| October | 49.3 °F | 75.1 °F | 3.62 in. |
| November | 38.7 °F | 63.0 °F | 2.67 in. |
| December | 30.1 °F | 52.6 °F | 2.39 in. |
| Annual | 49.1 °F | 72.8 °F | 41.76 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 7b : 5°F to 10°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |