Soper, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 51.2 °F (low) to 74.4 °F (high). Annual precipitation averages 46.6 Inches. Soper 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 | 30.6 °F | 53.3 °F | 2.84 in. |
| February | 34.5 °F | 57.9 °F | 3.01 in. |
| March | 42.0 °F | 65.7 °F | 4.12 in. |
| April | 49.7 °F | 73.8 °F | 4.3 in. |
| May | 59.8 °F | 80.8 °F | 5.94 in. |
| June | 68.1 °F | 88.8 °F | 4.3 in. |
| July | 71.2 °F | 93.7 °F | 3.13 in. |
| August | 70.0 °F | 94.2 °F | 2.89 in. |
| September | 63.0 °F | 87.6 °F | 3.85 in. |
| October | 51.2 °F | 76.7 °F | 4.54 in. |
| November | 41.0 °F | 64.8 °F | 3.82 in. |
| December | 33.1 °F | 55.4 °F | 3.86 in. |
| Annual | 51.2 °F | 74.4 °F | 46.6 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 |