Junior, West Virginia has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 39.7 °F (low) to 62.3 °F (high). Annual precipitation averages 52 Inches. Junior 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 19.9 °F | 39.3 °F | 3.91 in. |
| February | 21.6 °F | 42.9 °F | 3.8 in. |
| March | 28.1 °F | 51.3 °F | 4.49 in. |
| April | 37.6 °F | 63.8 °F | 4.47 in. |
| May | 47.5 °F | 71.6 °F | 5.51 in. |
| June | 56.1 °F | 78.5 °F | 5.31 in. |
| July | 60.3 °F | 81.8 °F | 5.83 in. |
| August | 58.8 °F | 81.0 °F | 3.96 in. |
| September | 51.8 °F | 75.9 °F | 3.78 in. |
| October | 39.7 °F | 65.0 °F | 3.54 in. |
| November | 30.1 °F | 53.2 °F | 3.12 in. |
| December | 24.6 °F | 43.4 °F | 4.31 in. |
| Annual | 39.7 °F | 62.3 °F | 52.03 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| 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 | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |