Tulsa, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.5 °C (low) to 21.9 °C (high). Annual precipitation averages 1069.9 Millimeters. Tulsa 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 | -3 °C | 9.2 °C | 44.45 mm |
| February | -1.2 °C | 11.7 °C | 48.51 mm |
| March | 3.8 °C | 16.8 °C | 82.55 mm |
| April | 8.8 °C | 21.8 °C | 113.54 mm |
| May | 14.7 °C | 25.9 °C | 151.64 mm |
| June | 19.7 °C | 30.8 °C | 121.67 mm |
| July | 22 °C | 33.7 °C | 99.31 mm |
| August | 21 °C | 33.6 °C | 89.92 mm |
| September | 16.4 °C | 29.2 °C | 95 mm |
| October | 9.6 °C | 23.1 °C | 91.95 mm |
| November | 3.6 °C | 16.4 °C | 73.66 mm |
| December | -1.3 °C | 10.4 °C | 57.66 mm |
| Annual | 9.5 °C | 21.9 °C | 1069.86 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 |