Russell, Ontario climate data is summarized below. Average annual temperatures range from 2 °C (low) to 12.2 °C (high). Annual precipitation averages 437 Millimeters. Russell is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -13.44 °C | -4.54 °C | 0 mm |
| February | -13.24 °C | -3.71 °C | 0 mm |
| March | -6.7 °C | 3.33 °C | 14 mm |
| April | 1.47 °C | 12.48 °C | 38 mm |
| May | 8 °C | 20.25 °C | 46 mm |
| June | 13.14 °C | 24.46 °C | 58 mm |
| July | 15.63 °C | 27.09 °C | 96 mm |
| August | 14.71 °C | 26.1 °C | 77 mm |
| September | 9.86 °C | 21.59 °C | 47 mm |
| October | 4.45 °C | 13.95 °C | 35 mm |
| November | -1.59 °C | 6.71 °C | 20 mm |
| December | -8.72 °C | -1.63 °C | 6 mm |
| Annual | 2 °C | 12.2 °C | 437 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |