Luther, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 48.8 °F (low) to 71.8 °F (high). Annual precipitation averages 36.2 Inches. Luther 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. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 26.6 °F | 49.7 °F | 1.32 in. |
| February | 29.7 °F | 53.5 °F | 1.56 in. |
| March | 38.3 °F | 62.6 °F | 2.72 in. |
| April | 47.4 °F | 71.9 °F | 3.67 in. |
| May | 57.6 °F | 79.1 °F | 5.01 in. |
| June | 66.8 °F | 87.4 °F | 4.75 in. |
| July | 71.1 °F | 93.2 °F | 3.32 in. |
| August | 69.6 °F | 92.8 °F | 3.23 in. |
| September | 61.2 °F | 85.0 °F | 3.46 in. |
| October | 49.2 °F | 73.9 °F | 3.42 in. |
| November | 38.4 °F | 61.9 °F | 1.98 in. |
| December | 29.2 °F | 51.1 °F | 1.75 in. |
| Annual | 48.8 °F | 71.8 °F | 36.19 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| 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 7a : 0°F to 5°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |