Geary, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47.9 °F (low) to 71.5 °F (high). Annual precipitation averages 31.7 Inches. Geary 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 Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 26.1 °F | 48.9 °F | 1.0 in. |
| February | 28.9 °F | 52.4 °F | 1.19 in. |
| March | 37.1 °F | 62.0 °F | 2.4 in. |
| April | 45.7 °F | 70.9 °F | 3.13 in. |
| May | 56.5 °F | 79.4 °F | 4.45 in. |
| June | 66.2 °F | 88.6 °F | 4.08 in. |
| July | 70.5 °F | 93.8 °F | 2.55 in. |
| August | 68.9 °F | 92.9 °F | 3.73 in. |
| September | 61.1 °F | 85.0 °F | 2.96 in. |
| October | 48.9 °F | 73.3 °F | 2.97 in. |
| November | 37.1 °F | 60.5 °F | 1.76 in. |
| December | 27.9 °F | 49.7 °F | 1.43 in. |
| Annual | 47.9 °F | 71.5 °F | 31.65 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 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |