Delta, British Columbia climate data is summarized below. Average annual temperatures range from 7 °C (low) to 14.1 °C (high). Annual precipitation averages 835 Millimeters. 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 | 1.4 °C | 6.16 °C | 112 mm |
| February | 2.88 °C | 8.6 °C | 72 mm |
| March | 3.9 °C | 10.26 °C | 95 mm |
| April | 5.47 °C | 13.61 °C | 52 mm |
| May | 8.79 °C | 17.5 °C | 44 mm |
| June | 11.26 °C | 19.42 °C | 33 mm |
| July | 13.42 °C | 22.73 °C | 20 mm |
| August | 13.54 °C | 22.55 °C | 23 mm |
| September | 10.97 °C | 19.24 °C | 54 mm |
| October | 7.33 °C | 14.04 °C | 123 mm |
| November | 3.82 °C | 9.33 °C | 121 mm |
| December | 1.31 °C | 5.83 °C | 86 mm |
| Annual | 7 °C | 14.1 °C | 835 mm |
| 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 : -12.2°C to -9.4°C |
| Current Drought Conditions | Abnormally Dry |