| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F | |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F | |
| 1990 Hardiness Zone: | Zone 6b: -5F to 0F | |
| Average First Frost Date: | Oct. 21 - Oct. 31 | |
| Average Last Frost Date: | Apr. 11 - Apr. 20 | |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate | |
| Ecoregion: | 27d - Wellington-McPherson Lowland | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 73717 - Alva, OK | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 20 | 25 | 33 | 43 | 55 | 64 | 70 | 68 | 59 | 46 | 33 | 24 | 45 |
| Avg Max Temp (°F) | 45 | 52 | 61 | 71 | 80 | 90 | 96 | 94 | 86 | 74 | 58 | 47 | 71 |
| Avg Precip (In.) | .8 | 1.06 | 2.51 | 2.56 | 4.29 | 3.7 | 2.82 | 2.93 | 2.66 | 2.29 | 1.72 | 1.08 | 28.41 |