Hollis, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47.9 °F (low) to 75.5 °F (high). Annual precipitation averages 25.6 Inches. Hollis 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 | 25.8 °F | 53.7 °F | 0.78 in. |
| February | 29.2 °F | 57.3 °F | 1.01 in. |
| March | 37.5 °F | 66.9 °F | 1.56 in. |
| April | 45.7 °F | 75.4 °F | 2.48 in. |
| May | 56.8 °F | 83.8 °F | 3.74 in. |
| June | 66.6 °F | 92.7 °F | 3.53 in. |
| July | 70.1 °F | 96.9 °F | 2.38 in. |
| August | 69.1 °F | 96.2 °F | 2.8 in. |
| September | 61.3 °F | 88.0 °F | 2.57 in. |
| October | 48.7 °F | 76.9 °F | 2.4 in. |
| November | 36.6 °F | 64.4 °F | 1.33 in. |
| December | 27.5 °F | 54.1 °F | 1.0 in. |
| Annual | 47.9 °F | 75.5 °F | 25.58 in. |
| 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 : 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 |