Kiefer, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 48.9 °F (low) to 71.8 °F (high). Annual precipitation averages 42.5 Inches. Kiefer 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 | 26.5 °F | 49.4 °F | 1.76 in. |
| February | 29.9 °F | 53.7 °F | 2.0 in. |
| March | 38.8 °F | 62.8 °F | 3.11 in. |
| April | 47.9 °F | 71.5 °F | 4.47 in. |
| May | 58.2 °F | 78.8 °F | 5.96 in. |
| June | 67.1 °F | 87.3 °F | 4.77 in. |
| July | 71.0 °F | 92.6 °F | 3.87 in. |
| August | 69.3 °F | 92.6 °F | 3.48 in. |
| September | 61.0 °F | 84.9 °F | 3.81 in. |
| October | 48.9 °F | 74.0 °F | 3.78 in. |
| November | 38.2 °F | 62.2 °F | 3.18 in. |
| December | 29.4 °F | 51.3 °F | 2.32 in. |
| Annual | 48.9 °F | 71.8 °F | 42.51 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |