| 2023 Hardiness Zone: | Zone 8a: 10°F to 15°F |
| 2012 Hardiness Zone: | Zone 8a: 10°F to 15°F |
| 1990 Hardiness Zone: | Zone 7b: 5F to 10F |
| 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: | 35b - Floodplains and Low Terraces |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 71998 - Arkadelphia, AR | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 30 | 34 | 42 | 49 | 58 | 66 | 69 | 68 | 61 | 49 | 40 | 33 | 50 |
| Avg Max Temp (°F) | 54 | 60 | 69 | 77 | 83 | 89 | 93 | 93 | 87 | 77 | 65 | 56 | 75 |
| Avg Precip (In.) | 3.97 | 3.68 | 4.98 | 4.85 | 5.82 | 4.39 | 3.96 | 2.81 | 3.62 | 4.65 | 5.92 | 5.02 | 53.66 |