Altus, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.6 °C (low) to 23.9 °C (high). Annual precipitation averages 701 Millimeters. 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 | -2.8 °C | 11.7 °C | 25.91 mm |
| February | -0.8 °C | 13.8 °C | 29.46 mm |
| March | 3.8 °C | 19.1 °C | 45.72 mm |
| April | 8.2 °C | 23.8 °C | 68.07 mm |
| May | 14.6 °C | 28.8 °C | 104.39 mm |
| June | 19.9 °C | 33.6 °C | 95.76 mm |
| July | 21.9 °C | 35.8 °C | 61.72 mm |
| August | 21.2 °C | 35.2 °C | 68.33 mm |
| September | 16.9 °C | 30.8 °C | 65.28 mm |
| October | 10.1 °C | 24.9 °C | 66.55 mm |
| November | 3.3 °C | 17.8 °C | 37.08 mm |
| December | -1.7 °C | 12 °C | 32.77 mm |
| Annual | 9.6 °C | 23.9 °C | 701.04 mm |
| 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 : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |