Montclair, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46 °F (low) to 66.8 °F (high). Annual precipitation averages 43.9 Inches. Montclair is located in USDA Plant Hardiness Zone 7b. 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 | 25.4 °F | 44.1 °F | 3.03 in. |
| February | 27.0 °F | 47.6 °F | 2.64 in. |
| March | 33.7 °F | 55.9 °F | 3.76 in. |
| April | 44.0 °F | 67.5 °F | 3.21 in. |
| May | 54.0 °F | 75.3 °F | 4.1 in. |
| June | 62.9 °F | 83.6 °F | 4.27 in. |
| July | 67.8 °F | 88.0 °F | 4.42 in. |
| August | 65.9 °F | 86.1 °F | 3.67 in. |
| September | 59.2 °F | 79.4 °F | 4.31 in. |
| October | 46.8 °F | 68.1 °F | 3.7 in. |
| November | 35.8 °F | 57.4 °F | 3.25 in. |
| December | 29.4 °F | 48.1 °F | 3.55 in. |
| Annual | 46 °F | 66.8 °F | 43.91 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 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |