| 2023 Hardiness Zone: | Zone 7b: 5°F to 10°F 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: | 38b - Lower Boston Mountains |
| Heat Zone Days: | 46 - 60 days Over 86°F |
Annual Climate Data for ZIP Code 72740 - Huntsville, AR | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 23 | 27 | 35 | 44 | 52 | 60 | 65 | 63 | 56 | 45 | 36 | 28 | 45 |
| Avg Max Temp (°F) | 47 | 53 | 61 | 71 | 77 | 84 | 89 | 89 | 81 | 72 | 59 | 51 | 70 |
| Avg Precip (In.) | 2.39 | 2.64 | 4.43 | 4.39 | 5.15 | 4.94 | 3.26 | 3.32 | 4.48 | 3.62 | 4.91 | 3.53 | 47.08 |