Blanchard, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 49.2 °F (low) to 72.5 °F (high). Annual precipitation averages 35.3 Inches. Blanchard 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 | 27.2 °F | 50.3 °F | 1.33 in. |
| February | 30.6 °F | 54.5 °F | 1.54 in. |
| March | 39.3 °F | 63.7 °F | 2.63 in. |
| April | 47.4 °F | 72.4 °F | 3.58 in. |
| May | 57.8 °F | 79.8 °F | 5.22 in. |
| June | 66.9 °F | 88.0 °F | 4.21 in. |
| July | 70.9 °F | 93.9 °F | 3.18 in. |
| August | 69.8 °F | 93.8 °F | 2.97 in. |
| September | 62.0 °F | 85.5 °F | 3.46 in. |
| October | 49.8 °F | 74.6 °F | 3.19 in. |
| November | 38.6 °F | 62.2 °F | 2.04 in. |
| December | 29.8 °F | 51.6 °F | 1.95 in. |
| Annual | 49.2 °F | 72.5 °F | 35.3 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |