Osage, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 48.5 °F (low) to 72.1 °F (high). Annual precipitation averages 40.2 Inches. Osage is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 25.9 °F | 49.3 °F | 1.54 in. |
| February | 29.6 °F | 54.0 °F | 1.68 in. |
| March | 38.5 °F | 63.2 °F | 3.02 in. |
| April | 47.7 °F | 72.8 °F | 4.3 in. |
| May | 57.6 °F | 79.4 °F | 5.56 in. |
| June | 66.6 °F | 87.9 °F | 4.67 in. |
| July | 70.7 °F | 93.1 °F | 3.97 in. |
| August | 69.0 °F | 93.1 °F | 3.86 in. |
| September | 60.5 °F | 84.9 °F | 3.85 in. |
| October | 48.6 °F | 74.5 °F | 3.5 in. |
| November | 37.9 °F | 61.7 °F | 2.39 in. |
| December | 29.1 °F | 51.1 °F | 1.9 in. |
| Annual | 48.5 °F | 72.1 °F | 40.24 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |