Climate averages 1991–2020
Delta weather
in August.
A warm, moderately wet month: the warmest and the 2nd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
August is a warm month in Delta: daytime highs average 23.0°C and nights cool to about 14.4°C. By daytime temperature it is the warmest month of the year.
Expect about 41 mm of rain on roughly 5 days, which makes August a moderately wet month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 24 min on an average August day.
The nearest other city in this atlas is New Westminster (17 km away). In August its highs average 22.6°C, about as warm as Delta, with 73 mm of rain.
Among the 86 cities listed in Canada, Delta ranks joint 62nd of 86 for the warmest August highs and joint 5th of 86 for the driest August (rainfall, lowest first). The mean August high of those 86 cities is 23.8°C; Delta is 0.8°C cooler than that mean.
From August to September, average highs fall by 3.4°C to 19.6°C, and monthly rainfall rises from 41 mm to 72 mm.
The annual picture
August in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Delta climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 6.1°C1.4°C | 1.4°C | 209 | 18.0 | 8.79 h |
| February | 7.7°C1.6°C | 1.6°C | 125 | 14.3 | 10.110 h |
| March | 9.8°C3.1°C | 3.1°C | 156 | 17.3 | 11.912 h |
| April | 12.8°C5.4°C | 5.4°C | 109 | 13.7 | 13.714 h |
| May | 16.8°C8.8°C | 8.8°C | 69 | 10.1 | 15.315 h |
| June | 19.2°C11.6°C | 11.6°C | 49 | 8.1 | 16.116 h |
| July | 22.8°C14.2°C | 14.2°C | 28 | 4.6 | 15.816 h |
| August, selected | 23.0°C14.4°C | 14.4°C | 41 | 4.8 | 14.414 h |
| September | 19.6°C12.0°C | 12.0°C | 72 | 8.2 | 12.713 h |
| October | 13.6°C7.9°C | 7.9°C | 155 | 14.3 | 10.811 h |
| November | 8.6°C4.0°C | 4.0°C | 232 | 18.4 | 9.29 h |
| December | 5.7°C1.4°C | 1.4°C | 198 | 17.7 | 8.38 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- New Westminster in AugustCanada · 17 kmHigh 22.6°C · Low 13.4°C · 73 mm rain
- Surrey in AugustCanada · 17 kmHigh 23.0°C · Low 13.3°C · 49 mm rain
- Vancouver in AugustCanada · 18 kmHigh 21.8°C · Low 14.4°C · 73 mm rain
- Burnaby in AugustCanada · 21 kmHigh 22.4°C · Low 14.3°C · 73 mm rain
- North Vancouver in AugustCanada · 25 kmHigh 22.1°C · Low 14.6°C · 73 mm rain
- Langley in AugustCanada · 29 kmHigh 23.5°C · Low 13.6°C · 49 mm rain
- Coquitlam in AugustCanada · 29 kmHigh 23.3°C · Low 14.4°C · 84 mm rain
- Maple Ridge in AugustCanada · 36 kmHigh 23.3°C · Low 13.8°C · 107 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Delta) is explained once on the Delta year overview and on the Sources, method and limits page.