Kingston, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.9 °C (low) to 23.4 °C (high). Annual precipitation averages 1074.7 Millimeters. Kingston is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.8 °C | 11.5 °C | 59.44 mm |
| February | 1.2 °C | 13.8 °C | 59.69 mm |
| March | 5.6 °C | 18.5 °C | 86.36 mm |
| April | 9.9 °C | 23.2 °C | 98.3 mm |
| May | 15.4 °C | 26.9 °C | 149.1 mm |
| June | 20.3 °C | 31.7 °C | 118.36 mm |
| July | 22.4 °C | 34.4 °C | 72.64 mm |
| August | 21.9 °C | 34.6 °C | 70.61 mm |
| September | 17.8 °C | 30.5 °C | 100.33 mm |
| October | 11.3 °C | 24.6 °C | 107.95 mm |
| November | 5.3 °C | 18.1 °C | 73.66 mm |
| December | 0.4 °C | 12.4 °C | 78.23 mm |
| Annual | 10.9 °C | 23.4 °C | 1074.67 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |