Russell, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.6 °C (low) to 15.2 °C (high). Annual precipitation averages 1304.8 Millimeters. Russell is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.2 °C | 1 °C | 91.19 mm |
| February | -8.6 °C | 2.6 °C | 84.07 mm |
| March | -3.8 °C | 7.3 °C | 104.14 mm |
| April | 2.3 °C | 14.8 °C | 106.17 mm |
| May | 8.2 °C | 21.2 °C | 101.85 mm |
| June | 13.2 °C | 25.7 °C | 118.87 mm |
| July | 16.2 °C | 28.6 °C | 109.73 mm |
| August | 15.2 °C | 27.5 °C | 113.03 mm |
| September | 10.8 °C | 23.4 °C | 121.16 mm |
| October | 4.6 °C | 16.7 °C | 135.38 mm |
| November | -0.7 °C | 10.1 °C | 100.33 mm |
| December | -5.6 °C | 4 °C | 118.87 mm |
| Annual | 3.6 °C | 15.2 °C | 1304.79 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| 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 | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |