Monterey, Virginia has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 37.7 °F (low) to 59.2 °F (high). Annual precipitation averages 47.2 Inches. Monterey is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.7 °F | 36.8 °F | 3.62 in. |
| February | 20.2 °F | 40.1 °F | 2.99 in. |
| March | 27.1 °F | 48.3 °F | 4.33 in. |
| April | 35.9 °F | 60.3 °F | 4.61 in. |
| May | 46.2 °F | 68.4 °F | 4.54 in. |
| June | 53.0 °F | 75.2 °F | 5.16 in. |
| July | 56.6 °F | 78.7 °F | 4.37 in. |
| August | 55.4 °F | 77.7 °F | 3.52 in. |
| September | 49.9 °F | 72.3 °F | 3.91 in. |
| October | 38.7 °F | 62.1 °F | 3.04 in. |
| November | 28.9 °F | 50.2 °F | 3.05 in. |
| December | 22.1 °F | 40.8 °F | 4.1 in. |
| Annual | 37.7 °F | 59.2 °F | 47.24 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |