Prosperity, West Virginia has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 42.7 °F (low) to 61.4 °F (high). Annual precipitation averages 45.6 Inches. Prosperity is located in USDA Plant Hardiness Zone 6b. 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 | 23.2 °F | 39.7 °F | 3.2 in. |
| February | 25.4 °F | 43.1 °F | 3.11 in. |
| March | 31.7 °F | 51.1 °F | 4.1 in. |
| April | 41.7 °F | 63.2 °F | 4.05 in. |
| May | 50.6 °F | 70.7 °F | 4.83 in. |
| June | 58.1 °F | 76.8 °F | 4.49 in. |
| July | 61.9 °F | 79.9 °F | 5.24 in. |
| August | 60.6 °F | 78.9 °F | 3.78 in. |
| September | 54.7 °F | 73.9 °F | 3.47 in. |
| October | 43.7 °F | 63.5 °F | 2.75 in. |
| November | 33.7 °F | 52.6 °F | 2.85 in. |
| December | 27.5 °F | 43.1 °F | 3.72 in. |
| Annual | 42.7 °F | 61.4 °F | 45.59 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°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 |