Rainelle, West Virginia has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.6 °C (low) to 16 °C (high). Annual precipitation averages 1331.2 Millimeters. Rainelle 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 | -7.1 °C | 4.2 °C | 102.87 mm |
| February | -6.6 °C | 5.9 °C | 93.73 mm |
| March | -2.7 °C | 10.6 °C | 119.89 mm |
| April | 2.4 °C | 16.8 °C | 120.65 mm |
| May | 7.8 °C | 21.2 °C | 134.87 mm |
| June | 12.4 °C | 24.6 °C | 135.89 mm |
| July | 14.6 °C | 26.3 °C | 140.46 mm |
| August | 14.2 °C | 25.8 °C | 110.74 mm |
| September | 10.5 °C | 23 °C | 95.25 mm |
| October | 4.1 °C | 17.3 °C | 83.31 mm |
| November | -1.6 °C | 10.8 °C | 83.31 mm |
| December | -4.9 °C | 5.2 °C | 110.24 mm |
| Annual | 3.6 °C | 16 °C | 1331.21 mm |
| 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 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |