Russell, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.9 °C (low) to 14.4 °C (high). Annual precipitation averages 1165.6 Millimeters. Russell 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 | -8.8 °C | 0.1 °C | 89.92 mm |
| February | -8.7 °C | 1.5 °C | 63.75 mm |
| March | -4.8 °C | 6.5 °C | 77.72 mm |
| April | 1.1 °C | 14.3 °C | 100.58 mm |
| May | 7.1 °C | 20.9 °C | 97.54 mm |
| June | 12 °C | 25 °C | 113.28 mm |
| July | 14.2 °C | 27.4 °C | 123.19 mm |
| August | 13.6 °C | 26.7 °C | 105.92 mm |
| September | 10 °C | 23.1 °C | 99.06 mm |
| October | 4.3 °C | 16.1 °C | 102.62 mm |
| November | -0.6 °C | 8.8 °C | 93.98 mm |
| December | -4.8 °C | 2.8 °C | 98.04 mm |
| Annual | 2.9 °C | 14.4 °C | 1165.6 mm |
| 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 : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |