| 2023 Hardiness Zone: | Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°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: | 39a - Springfield Plateau |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 72722 - Decatur, AR | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 24 | 28 | 37 | 45 | 54 | 62 | 67 | 65 | 58 | 47 | 37 | 27 | 46 |
| Avg Max Temp (°F) | 45 | 51 | 60 | 70 | 77 | 84 | 90 | 89 | 82 | 71 | 58 | 48 | 69 |
| Avg Precip (In.) | 2.25 | 2.38 | 4.28 | 4.38 | 5.36 | 5.04 | 3.26 | 3.33 | 4.91 | 3.84 | 4.73 | 3.43 | 47.17 |