Jenks, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.2 °C (low) to 21.9 °C (high). Annual precipitation averages 1073.9 Millimeters. Jenks 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 | -3.3 °C | 9.3 °C | 44.7 mm |
| February | -1.5 °C | 11.7 °C | 49.02 mm |
| March | 3.4 °C | 16.7 °C | 85.34 mm |
| April | 8.6 °C | 21.9 °C | 110.74 mm |
| May | 14.5 °C | 26.1 °C | 153.92 mm |
| June | 19.6 °C | 30.9 °C | 118.36 mm |
| July | 21.7 °C | 33.7 °C | 100.08 mm |
| August | 20.7 °C | 33.6 °C | 88.39 mm |
| September | 16.2 °C | 29.3 °C | 95.25 mm |
| October | 9.2 °C | 23.2 °C | 92.71 mm |
| November | 3.2 °C | 16.5 °C | 74.93 mm |
| December | -1.7 °C | 10.4 °C | 60.45 mm |
| Annual | 9.2 °C | 21.9 °C | 1073.89 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 7a : -17.8°C to -15°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |