Lake Monticello, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 44 °F (low) to 68.3 °F (high). Annual precipitation averages 44.8 Inches. Lake Monticello is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 24.5 °F | 46.7 °F | 3.15 in. |
| February | 26.0 °F | 50.1 °F | 2.74 in. |
| March | 32.4 °F | 58.4 °F | 3.86 in. |
| April | 42.3 °F | 69.7 °F | 3.39 in. |
| May | 51.9 °F | 76.6 °F | 4.27 in. |
| June | 60.6 °F | 84.3 °F | 4.36 in. |
| July | 65.3 °F | 88.1 °F | 4.21 in. |
| August | 63.6 °F | 86.5 °F | 3.67 in. |
| September | 56.6 °F | 80.2 °F | 4.48 in. |
| October | 44.1 °F | 70.0 °F | 3.74 in. |
| November | 33.5 °F | 59.5 °F | 3.43 in. |
| December | 27.6 °F | 50.0 °F | 3.51 in. |
| Annual | 44 °F | 68.3 °F | 44.81 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |