Russell, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 37.2 °F (low) to 58 °F (high). Annual precipitation averages 45.9 Inches. 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 | 16.2 °F | 32.1 °F | 3.54 in. |
| February | 16.4 °F | 34.7 °F | 2.51 in. |
| March | 23.3 °F | 43.7 °F | 3.06 in. |
| April | 33.9 °F | 57.8 °F | 3.96 in. |
| May | 44.7 °F | 69.7 °F | 3.84 in. |
| June | 53.6 °F | 77.0 °F | 4.46 in. |
| July | 57.5 °F | 81.4 °F | 4.85 in. |
| August | 56.4 °F | 80.1 °F | 4.17 in. |
| September | 50.0 °F | 73.6 °F | 3.9 in. |
| October | 39.7 °F | 60.9 °F | 4.04 in. |
| November | 30.9 °F | 47.8 °F | 3.7 in. |
| December | 23.3 °F | 37.0 °F | 3.86 in. |
| Annual | 37.2 °F | 58 °F | 45.89 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 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |