Tlell, British Columbia climate data is summarized below. Average annual temperatures range from 6 °C (low) to 10.5 °C (high). Annual precipitation averages 1455 Millimeters. Tlell is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 2.41 °C | 5.89 °C | 167 mm |
| February | 2.22 °C | 6.21 °C | 127 mm |
| March | 2.15 °C | 6.74 °C | 137 mm |
| April | 3.85 °C | 8.9 °C | 112 mm |
| May | 6.42 °C | 11.85 °C | 70 mm |
| June | 9.08 °C | 14 °C | 68 mm |
| July | 11.22 °C | 16.27 °C | 53 mm |
| August | 11.89 °C | 16.95 °C | 82 mm |
| September | 9.73 °C | 14.93 °C | 128 mm |
| October | 7.02 °C | 11.25 °C | 184 mm |
| November | 3.61 °C | 7.47 °C | 164 mm |
| December | 1.99 °C | 5.5 °C | 163 mm |
| Annual | 6 °C | 10.5 °C | 1455 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Normal |