Stuart, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.9 °C (low) to 22.6 °C (high). Annual precipitation averages 1106.2 Millimeters. Stuart 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 | -2 °C | 10.6 °C | 60.45 mm |
| February | 0 °C | 12.9 °C | 62.48 mm |
| March | 4.6 °C | 17.7 °C | 90.68 mm |
| April | 9.2 °C | 22.5 °C | 109.73 mm |
| May | 14.8 °C | 26.2 °C | 140.97 mm |
| June | 19.6 °C | 30.8 °C | 123.7 mm |
| July | 21.6 °C | 33.8 °C | 95 mm |
| August | 20.9 °C | 34.1 °C | 77.22 mm |
| September | 16.6 °C | 30.1 °C | 97.54 mm |
| October | 10.2 °C | 23.8 °C | 101.09 mm |
| November | 4.3 °C | 17.5 °C | 73.91 mm |
| December | -0.6 °C | 11.7 °C | 73.41 mm |
| Annual | 9.9 °C | 22.6 °C | 1106.18 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |