Keys, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.1 °C (low) to 21.4 °C (high). Annual precipitation averages 1223 Millimeters. Keys 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 | -2.8 °C | 9.2 °C | 65.28 mm |
| February | -0.9 °C | 11.5 °C | 62.99 mm |
| March | 3.7 °C | 16.4 °C | 101.35 mm |
| April | 8.3 °C | 21.4 °C | 120.9 mm |
| May | 13.6 °C | 25.3 °C | 156.21 mm |
| June | 18.7 °C | 29.8 °C | 129.79 mm |
| July | 20.8 °C | 32.9 °C | 97.28 mm |
| August | 20.1 °C | 32.8 °C | 89.15 mm |
| September | 15.9 °C | 28.9 °C | 116.33 mm |
| October | 9.4 °C | 22.4 °C | 113.54 mm |
| November | 3.7 °C | 16.3 °C | 95.25 mm |
| December | -1.2 °C | 10.2 °C | 74.93 mm |
| Annual | 9.1 °C | 21.4 °C | 1223 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |