Blair, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.3 °C (low) to 23.7 °C (high). Annual precipitation averages 715 Millimeters. 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 | -3.1 °C | 11.5 °C | 25.65 mm |
| February | -1.2 °C | 13.5 °C | 29.21 mm |
| March | 3.5 °C | 18.8 °C | 47.24 mm |
| April | 7.9 °C | 23.5 °C | 70.87 mm |
| May | 14.3 °C | 28.5 °C | 106.68 mm |
| June | 19.7 °C | 33.4 °C | 92.2 mm |
| July | 21.7 °C | 35.7 °C | 62.99 mm |
| August | 21.1 °C | 35.2 °C | 75.18 mm |
| September | 16.8 °C | 30.8 °C | 69.85 mm |
| October | 9.8 °C | 24.7 °C | 66.29 mm |
| November | 3 °C | 17.6 °C | 37.85 mm |
| December | -2 °C | 11.7 °C | 30.99 mm |
| Annual | 9.3 °C | 23.7 °C | 715 mm |
| 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 : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |