Blackburn, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 48.3 °F (low) to 72.2 °F (high). Annual precipitation averages 39.6 Inches. Blackburn 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 | 25.6 °F | 49.4 °F | 1.46 in. |
| February | 29.5 °F | 54.0 °F | 1.65 in. |
| March | 38.5 °F | 63.3 °F | 2.98 in. |
| April | 47.7 °F | 73.1 °F | 4.24 in. |
| May | 57.4 °F | 79.5 °F | 5.64 in. |
| June | 66.3 °F | 88.0 °F | 4.7 in. |
| July | 70.4 °F | 93.2 °F | 3.86 in. |
| August | 68.6 °F | 93.3 °F | 3.66 in. |
| September | 60.1 °F | 84.9 °F | 3.77 in. |
| October | 48.3 °F | 74.7 °F | 3.45 in. |
| November | 37.7 °F | 61.9 °F | 2.31 in. |
| December | 28.9 °F | 51.0 °F | 1.83 in. |
| Annual | 48.3 °F | 72.2 °F | 39.55 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |