Loyal, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47.2 °F (low) to 72.2 °F (high). Annual precipitation averages 33 Inches. Loyal 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 | 24.5 °F | 48.7 °F | 1.02 in. |
| February | 27.7 °F | 52.6 °F | 1.39 in. |
| March | 36.2 °F | 62.2 °F | 2.4 in. |
| April | 44.5 °F | 71.2 °F | 3.39 in. |
| May | 55.8 °F | 80.4 °F | 4.6 in. |
| June | 66.1 °F | 90.1 °F | 4.47 in. |
| July | 70.6 °F | 95.6 °F | 3.08 in. |
| August | 68.9 °F | 94.2 °F | 3.52 in. |
| September | 60.9 °F | 86.5 °F | 2.82 in. |
| October | 48.4 °F | 73.9 °F | 3.04 in. |
| November | 35.9 °F | 60.6 °F | 1.77 in. |
| December | 26.8 °F | 49.8 °F | 1.51 in. |
| Annual | 47.2 °F | 72.2 °F | 33.01 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| 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 | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |