Old Eucha, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 48 °F (low) to 70.5 °F (high). Annual precipitation averages 47.8 Inches. Old Eucha 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 | 26.1 °F | 47.7 °F | 2.62 in. |
| February | 29.6 °F | 52.3 °F | 2.38 in. |
| March | 38.0 °F | 61.5 °F | 3.95 in. |
| April | 46.7 °F | 70.7 °F | 4.83 in. |
| May | 56.5 °F | 77.9 °F | 6.29 in. |
| June | 65.4 °F | 86.0 °F | 4.88 in. |
| July | 69.6 °F | 91.3 °F | 4.08 in. |
| August | 68.0 °F | 91.1 °F | 3.64 in. |
| September | 60.0 °F | 83.6 °F | 4.47 in. |
| October | 48.3 °F | 72.6 °F | 4.23 in. |
| November | 38.0 °F | 60.7 °F | 3.51 in. |
| December | 29.4 °F | 50.3 °F | 2.89 in. |
| Annual | 48 °F | 70.5 °F | 47.77 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 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 |