Delta, British Columbia climate data is summarized below. Average annual temperatures range from 44.6 °F (low) to 57.4 °F (high). Annual precipitation averages 32.9 Inches. Delta is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -17 °F | -14.4 °F | 2844.8 in. |
| February | -16.2 °F | -13 °F | 1828.8 in. |
| March | -15.6 °F | -12.1 °F | 2413 in. |
| April | -14.7 °F | -10.2 °F | 1320.8 in. |
| May | -12.9 °F | -8.1 °F | 1117.6 in. |
| June | -11.5 °F | -7 °F | 838.2 in. |
| July | -10.3 °F | -5.2 °F | 508 in. |
| August | -10.3 °F | -5.3 °F | 584.2 in. |
| September | -11.7 °F | -7.1 °F | 1371.6 in. |
| October | -13.7 °F | -10 °F | 3124.2 in. |
| November | -15.7 °F | -12.6 °F | 3073.4 in. |
| December | -17.1 °F | -14.5 °F | 2184.4 in. |
| Annual | 44.6 °F | 57.4 °F | 32.88 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Abnormally Dry |