Sycamore, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47.6 °F (low) to 70 °F (high). Annual precipitation averages 48.5 Inches. Sycamore 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 | 26.3 °F | 47.4 °F | 2.72 in. |
| February | 29.7 °F | 52.2 °F | 2.44 in. |
| March | 38.1 °F | 61.1 °F | 4.02 in. |
| April | 46.5 °F | 70.2 °F | 4.91 in. |
| May | 55.9 °F | 77.3 °F | 6.38 in. |
| June | 64.7 °F | 85.4 °F | 4.81 in. |
| July | 68.5 °F | 90.7 °F | 4.07 in. |
| August | 67.0 °F | 90.6 °F | 3.59 in. |
| September | 59.3 °F | 83.1 °F | 4.65 in. |
| October | 47.8 °F | 72.0 °F | 4.29 in. |
| November | 37.9 °F | 59.9 °F | 3.61 in. |
| December | 29.5 °F | 50.0 °F | 2.99 in. |
| Annual | 47.6 °F | 70 °F | 48.48 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |