Ralston, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47.7 °F (low) to 71.9 °F (high). Annual precipitation averages 38.4 Inches. Ralston 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 Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 24.9 °F | 48.8 °F | 1.35 in. |
| February | 28.5 °F | 53.2 °F | 1.54 in. |
| March | 37.7 °F | 62.9 °F | 2.87 in. |
| April | 47.0 °F | 72.5 °F | 4.05 in. |
| May | 57.1 °F | 79.2 °F | 5.51 in. |
| June | 66.3 °F | 87.9 °F | 4.69 in. |
| July | 70.3 °F | 93.2 °F | 3.79 in. |
| August | 68.5 °F | 93.0 °F | 3.97 in. |
| September | 60.0 °F | 85.0 °F | 3.62 in. |
| October | 48.2 °F | 74.4 °F | 3.07 in. |
| November | 36.6 °F | 61.8 °F | 2.13 in. |
| December | 27.8 °F | 50.3 °F | 1.81 in. |
| Annual | 47.7 °F | 71.9 °F | 38.4 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |