Bartow, West Virginia has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.5 °C (low) to 14.9 °C (high). Annual precipitation averages 1118.9 Millimeters. Bartow is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.1 °C | 2.4 °C | 89.92 mm |
| February | -7 °C | 4.2 °C | 76.96 mm |
| March | -3.4 °C | 8.9 °C | 100.08 mm |
| April | 1.4 °C | 15.8 °C | 95 mm |
| May | 6.9 °C | 20 °C | 125.48 mm |
| June | 11.3 °C | 23.8 °C | 100.08 mm |
| July | 13.3 °C | 25.7 °C | 108.97 mm |
| August | 12.7 °C | 25.3 °C | 92.71 mm |
| September | 8.9 °C | 22.3 °C | 90.17 mm |
| October | 2.8 °C | 16.4 °C | 74.93 mm |
| November | -2.5 °C | 9.7 °C | 74.17 mm |
| December | -5.8 °C | 4.7 °C | 90.42 mm |
| Annual | 2.5 °C | 14.9 °C | 1118.89 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |