| 2023 Hardiness Zone: | Zone 7a: 0°F to 5°F | |
| 2012 Hardiness Zone: | Zone 7a: 0°F to 5°F | |
| 1990 Hardiness Zone: | Zone 7a: 0F to 5F | |
| Average First Frost Date: | Oct. 11 - Oct. 20 | |
| Average Last Frost Date: | May 1 - May 10 | |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate | |
| Ecoregion: | 64c - Piedmont Uplands | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 20187 - Warrenton, VA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 23 | 25 | 32 | 42 | 51 | 60 | 65 | 63 | 56 | 44 | 36 | 27 | 44 |
| Avg Max Temp (°F) | 42 | 46 | 55 | 66 | 74 | 81 | 85 | 84 | 78 | 67 | 56 | 46 | 65 |
| Avg Precip (In.) | 3.31 | 2.76 | 3.59 | 3.32 | 4.29 | 3.93 | 3.89 | 3.82 | 4.02 | 3.47 | 3.48 | 3.14 | 43.03 |