| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F 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. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 67f - Southern Limestone/Dolomite Valleys and Low Rolling Hills |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 24224 - Castlewood, VA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 23 | 25 | 32 | 39 | 48 | 57 | 61 | 60 | 53 | 41 | 32 | 26 | 41 |
| Avg Max Temp (°F) | 44 | 49 | 58 | 67 | 75 | 82 | 85 | 84 | 78 | 69 | 58 | 48 | 66 |
| Avg Precip (In.) | 3.78 | 3.47 | 4.09 | 3.88 | 4.8 | 4.27 | 4.48 | 3.82 | 3.4 | 2.85 | 3.29 | 3.37 | 45.5 |