Poteau, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 49.4 °F (low) to 73.2 °F (high). Annual precipitation averages 49.9 Inches. Poteau 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. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 27.9 °F | 51.2 °F | 2.87 in. |
| February | 31.7 °F | 55.7 °F | 2.92 in. |
| March | 39.7 °F | 64.1 °F | 4.23 in. |
| April | 48.1 °F | 73.0 °F | 5.21 in. |
| May | 58.1 °F | 80.0 °F | 6.36 in. |
| June | 67.0 °F | 88.6 °F | 4.09 in. |
| July | 70.7 °F | 93.6 °F | 3.58 in. |
| August | 69.1 °F | 93.4 °F | 3.55 in. |
| September | 61.4 °F | 86.3 °F | 4.47 in. |
| October | 49.1 °F | 75.4 °F | 4.33 in. |
| November | 38.8 °F | 63.7 °F | 4.68 in. |
| December | 30.8 °F | 53.6 °F | 3.63 in. |
| Annual | 49.4 °F | 73.2 °F | 49.92 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 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |