Glencoe, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 48.1 °F (low) to 71.7 °F (high). Annual precipitation averages 37.8 Inches. Glencoe is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 25.3 °F | 49.0 °F | 1.35 in. |
| February | 28.2 °F | 52.7 °F | 1.53 in. |
| March | 37.1 °F | 62.5 °F | 2.75 in. |
| April | 46.7 °F | 71.4 °F | 3.98 in. |
| May | 57.4 °F | 79.2 °F | 5.24 in. |
| June | 66.8 °F | 87.9 °F | 4.71 in. |
| July | 70.8 °F | 93.2 °F | 3.61 in. |
| August | 69.4 °F | 93.0 °F | 3.45 in. |
| September | 61.5 °F | 85.5 °F | 3.85 in. |
| October | 48.9 °F | 73.8 °F | 3.67 in. |
| November | 37.4 °F | 61.7 °F | 2.01 in. |
| December | 27.7 °F | 50.1 °F | 1.68 in. |
| Annual | 48.1 °F | 71.7 °F | 37.83 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |