Roosevelt, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.4 °C (low) to 23.5 °C (high). Annual precipitation averages 770.1 Millimeters. Roosevelt is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.9 °C | 11.1 °C | 25.15 mm |
| February | -1.1 °C | 13.3 °C | 30.23 mm |
| March | 3.6 °C | 18.4 °C | 55.12 mm |
| April | 8 °C | 22.9 °C | 72.14 mm |
| May | 14.4 °C | 28.1 °C | 117.35 mm |
| June | 19.8 °C | 33.1 °C | 101.09 mm |
| July | 21.8 °C | 35.7 °C | 66.29 mm |
| August | 21.1 °C | 35.1 °C | 76.2 mm |
| September | 16.9 °C | 30.7 °C | 75.44 mm |
| October | 9.9 °C | 24.3 °C | 73.41 mm |
| November | 3.2 °C | 17.3 °C | 40.89 mm |
| December | -1.8 °C | 11.5 °C | 36.83 mm |
| Annual | 9.4 °C | 23.5 °C | 770.14 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |