Arkoma, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50.2 °F (low) to 72.7 °F (high). Annual precipitation averages 48.6 Inches. Arkoma is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 28.7 °F | 50.5 °F | 3.17 in. |
| February | 32.3 °F | 55.2 °F | 2.82 in. |
| March | 40.3 °F | 63.8 °F | 4.3 in. |
| April | 49.0 °F | 72.7 °F | 4.85 in. |
| May | 59.1 °F | 79.8 °F | 5.73 in. |
| June | 67.8 °F | 88.1 °F | 4.38 in. |
| July | 71.5 °F | 93.0 °F | 3.6 in. |
| August | 70.1 °F | 92.7 °F | 3.61 in. |
| September | 62.5 °F | 85.7 °F | 4.09 in. |
| October | 50.2 °F | 75.0 °F | 4.09 in. |
| November | 39.5 °F | 63.1 °F | 4.25 in. |
| December | 31.7 °F | 52.9 °F | 3.71 in. |
| Annual | 50.2 °F | 72.7 °F | 48.6 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |