Empire City, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.2 °C (low) to 23.6 °C (high). Annual precipitation averages 879.4 Millimeters. Empire City 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. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.9 °C | 11.6 °C | 35.56 mm |
| February | 0.1 °C | 13.7 °C | 43.43 mm |
| March | 4.9 °C | 18.8 °C | 67.06 mm |
| April | 9.2 °C | 23.2 °C | 84.84 mm |
| May | 15.1 °C | 27.6 °C | 120.4 mm |
| June | 20 °C | 32.2 °C | 104.9 mm |
| July | 22.1 °C | 35.2 °C | 61.21 mm |
| August | 21.6 °C | 35.2 °C | 69.34 mm |
| September | 17.3 °C | 30.6 °C | 91.69 mm |
| October | 10.5 °C | 24.5 °C | 93.73 mm |
| November | 4.2 °C | 17.9 °C | 57.91 mm |
| December | -0.9 °C | 12.2 °C | 49.28 mm |
| Annual | 10.2 °C | 23.6 °C | 879.35 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 8a : -12.2°C to -9.4°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 |