Okarche, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.9 °C (low) to 22 °C (high). Annual precipitation averages 869.2 Millimeters. Okarche 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 | -3.6 °C | 9.4 °C | 28.19 mm |
| February | -1.8 °C | 11.5 °C | 36.07 mm |
| March | 2.8 °C | 16.7 °C | 62.74 mm |
| April | 7.6 °C | 21.6 °C | 89.15 mm |
| May | 13.7 °C | 26.4 °C | 128.27 mm |
| June | 19.1 °C | 31.5 °C | 116.84 mm |
| July | 21.6 °C | 34.4 °C | 77.98 mm |
| August | 20.7 °C | 33.9 °C | 87.38 mm |
| September | 16.2 °C | 29.6 °C | 78.23 mm |
| October | 9.4 °C | 23.1 °C | 77.22 mm |
| November | 2.7 °C | 15.9 °C | 46.48 mm |
| December | -2.2 °C | 10.1 °C | 40.64 mm |
| Annual | 8.9 °C | 22 °C | 869.19 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 75-100 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 | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |