Altus, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 49.2 °F (low) to 75.1 °F (high). Annual precipitation averages 27.6 Inches. Altus 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 | 27.0 °F | 53.1 °F | 1.02 in. |
| February | 30.6 °F | 56.8 °F | 1.16 in. |
| March | 38.9 °F | 66.4 °F | 1.8 in. |
| April | 46.8 °F | 74.9 °F | 2.68 in. |
| May | 58.2 °F | 83.8 °F | 4.11 in. |
| June | 67.9 °F | 92.4 °F | 3.77 in. |
| July | 71.4 °F | 96.5 °F | 2.43 in. |
| August | 70.2 °F | 95.4 °F | 2.69 in. |
| September | 62.5 °F | 87.5 °F | 2.57 in. |
| October | 50.1 °F | 76.8 °F | 2.62 in. |
| November | 38.0 °F | 64.0 °F | 1.46 in. |
| December | 28.9 °F | 53.6 °F | 1.29 in. |
| Annual | 49.2 °F | 75.1 °F | 27.6 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 7b : 5°F to 10°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |