Achille, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 52.2 °F (low) to 74.1 °F (high). Annual precipitation averages 43.5 Inches. Achille is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 31.5 °F | 53.0 °F | 2.49 in. |
| February | 35.0 °F | 57.1 °F | 2.68 in. |
| March | 42.7 °F | 65.2 °F | 3.81 in. |
| April | 50.5 °F | 73.1 °F | 3.84 in. |
| May | 60.3 °F | 80.5 °F | 5.53 in. |
| June | 68.8 °F | 88.9 °F | 4.3 in. |
| July | 72.6 °F | 94.0 °F | 3.02 in. |
| August | 71.5 °F | 94.4 °F | 2.76 in. |
| September | 64.2 °F | 87.2 °F | 3.78 in. |
| October | 52.6 °F | 76.6 °F | 4.4 in. |
| November | 42.4 °F | 64.8 °F | 3.49 in. |
| December | 33.7 °F | 54.8 °F | 3.41 in. |
| Annual | 52.2 °F | 74.1 °F | 43.51 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 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 |