Grand Lake Towne, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47.8 °F (low) to 70.4 °F (high). Annual precipitation averages 46.3 Inches. Grand Lake Towne 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 Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 25.4 °F | 47.2 °F | 2.21 in. |
| February | 28.9 °F | 51.9 °F | 2.2 in. |
| March | 37.4 °F | 61.2 °F | 3.6 in. |
| April | 46.4 °F | 70.8 °F | 4.57 in. |
| May | 56.6 °F | 78.1 °F | 6.21 in. |
| June | 65.7 °F | 86.3 °F | 4.87 in. |
| July | 69.9 °F | 91.5 °F | 4.29 in. |
| August | 68.2 °F | 91.5 °F | 3.64 in. |
| September | 60.1 °F | 83.6 °F | 4.51 in. |
| October | 48.2 °F | 72.5 °F | 4.05 in. |
| November | 37.5 °F | 60.7 °F | 3.44 in. |
| December | 28.7 °F | 50.0 °F | 2.72 in. |
| Annual | 47.8 °F | 70.4 °F | 46.31 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| 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 |