Warner, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.8 °C (low) to 22.3 °C (high). Annual precipitation averages 1154.4 Millimeters. Warner 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 | -2.4 °C | 9.8 °C | 63.75 mm |
| February | -0.4 °C | 12.2 °C | 57.91 mm |
| March | 4.3 °C | 17.2 °C | 97.28 mm |
| April | 9 °C | 22.2 °C | 112.52 mm |
| May | 14.7 °C | 26.2 °C | 147.57 mm |
| June | 19.7 °C | 31.1 °C | 120.14 mm |
| July | 21.8 °C | 33.8 °C | 89.15 mm |
| August | 21.1 °C | 33.9 °C | 83.06 mm |
| September | 16.7 °C | 29.7 °C | 118.11 mm |
| October | 10 °C | 23.6 °C | 102.11 mm |
| November | 4.1 °C | 17.1 °C | 89.66 mm |
| December | -0.9 °C | 11 °C | 73.15 mm |
| Annual | 9.8 °C | 22.3 °C | 1154.41 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |