| 2023 Hardiness Zone: | Zone 7b: 5°F to 10°F | |
| 2012 Hardiness Zone: | Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F | |
| 1990 Hardiness Zone: | Zone 7a: 0F to 5F | |
| Average First Frost Date: | Nov. 1 - Nov. 10 | |
| Average Last Frost Date: | Apr. 1 - Apr. 10 | |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate | |
| Ecoregion: | 27m - Red River Tablelands | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 121 - 150 days Over 86°F |
Annual Climate Data for ZIP Code 73521 - Altus, OK | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 24 | 29 | 37 | 47 | 57 | 66 | 70 | 69 | 61 | 49 | 37 | 27 | 48 |
| Avg Max Temp (°F) | 51 | 57 | 66 | 75 | 83 | 92 | 97 | 95 | 87 | 77 | 63 | 53 | 75 |
| Avg Precip (In.) | .96 | 1.18 | 1.82 | 2.4 | 4.72 | 4.15 | 1.99 | 2.73 | 3.33 | 2.69 | 1.49 | 1.21 | 28.67 |