Climate averages 1991–2020
Delta weather
in July.
A warm, fairly dry month: the 2nd warmest and the driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
July is a warm month in Delta: daytime highs average 22.8°C and nights cool to about 14.2°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 28 mm of rain on roughly 5 days, which makes July a fairly dry month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 15 h 46 min on an average July day.
The nearest other city in this atlas is New Westminster (17 km away). In July its highs average 22.4°C, about as warm as Delta, with 53 mm of rain.
Among the 86 cities listed in Canada, Delta ranks 64th of 86 for the warmest July highs and 2nd of 86 for the driest July (rainfall, lowest first). The mean July high of those 86 cities is 24.4°C; Delta is 1.6°C cooler than that mean.
From July to August, average highs rise by 0.2°C to 23.0°C, and monthly rainfall rises from 28 mm to 41 mm.
The annual picture
July 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, selected | 22.8°C14.2°C | 14.2°C | 28 | 4.6 | 15.816 h |
| August | 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
July in nearby cities
- New Westminster in JulyCanada · 17 kmHigh 22.4°C · Low 13.1°C · 53 mm rain
- Surrey in JulyCanada · 17 kmHigh 22.7°C · Low 13.0°C · 33 mm rain
- Vancouver in JulyCanada · 18 kmHigh 21.6°C · Low 14.0°C · 53 mm rain
- Burnaby in JulyCanada · 21 kmHigh 22.2°C · Low 13.8°C · 53 mm rain
- North Vancouver in JulyCanada · 25 kmHigh 21.9°C · Low 14.2°C · 53 mm rain
- Langley in JulyCanada · 29 kmHigh 23.2°C · Low 13.4°C · 33 mm rain
- Coquitlam in JulyCanada · 29 kmHigh 23.1°C · Low 13.9°C · 60 mm rain
- Maple Ridge in JulyCanada · 36 kmHigh 23.0°C · Low 13.5°C · 80 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.