Blair, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 48.7 °F (low) to 74.7 °F (high). Annual precipitation averages 28.2 Inches. Blair 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 | 26.5 °F | 52.7 °F | 1.01 in. |
| February | 29.9 °F | 56.3 °F | 1.15 in. |
| March | 38.3 °F | 65.8 °F | 1.86 in. |
| April | 46.3 °F | 74.3 °F | 2.79 in. |
| May | 57.7 °F | 83.3 °F | 4.2 in. |
| June | 67.5 °F | 92.1 °F | 3.63 in. |
| July | 71.1 °F | 96.3 °F | 2.48 in. |
| August | 69.9 °F | 95.3 °F | 2.96 in. |
| September | 62.2 °F | 87.5 °F | 2.75 in. |
| October | 49.6 °F | 76.4 °F | 2.61 in. |
| November | 37.4 °F | 63.6 °F | 1.49 in. |
| December | 28.4 °F | 53.1 °F | 1.22 in. |
| Annual | 48.7 °F | 74.7 °F | 28.15 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 | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |