Tlell, British Columbia climate data is summarized below. Average annual temperatures range from 42.7 °F (low) to 50.9 °F (high). Annual precipitation averages 57.3 Inches. 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 | -16.4 °F | -14.5 °F | 4241.8 in. |
| February | -16.5 °F | -14.3 °F | 3225.8 in. |
| March | -16.6 °F | -14 °F | 3479.8 in. |
| April | -15.6 °F | -12.8 °F | 2844.8 in. |
| May | -14.2 °F | -11.2 °F | 1778 in. |
| June | -12.7 °F | -10 °F | 1727.2 in. |
| July | -11.5 °F | -8.7 °F | 1346.2 in. |
| August | -11.2 °F | -8.4 °F | 2082.8 in. |
| September | -12.4 °F | -9.5 °F | 3251.2 in. |
| October | -13.9 °F | -11.5 °F | 4673.6 in. |
| November | -15.8 °F | -13.6 °F | 4165.6 in. |
| December | -16.7 °F | -14.7 °F | 4140.2 in. |
| Annual | 42.7 °F | 50.9 °F | 57.29 in. |
| 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 : 5°F to 10°F |
| Current Drought Conditions | Normal |