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Delta Weather by Month
Average temperatures, rainfall and humidity for Delta, Canada, month by month, built from OpenWeather's historical records. Use it to see what a typical Delta month looks like before you travel — then check the live Delta forecast for the days ahead.
Warmest month
August
25°C average high
Coolest month
February
3°C average low
Wettest month
March
154 mm of rain
Driest month
August
31 mm of rain
Average temperature and rainfall in Delta by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 7°C | 3°C | -13°C / 14°C | 120 mm | 88% | 12 km/h |
| February | 7°C | 3°C | -7°C / 15°C | 90 mm | 84% | 13 km/h |
| March | 11°C | 4°C | -2°C / 19°C | 154 mm | 82% | 13 km/h |
| April | 14°C | 6°C | 1°C / 24°C | 86 mm | 77% | 12 km/h |
| May | 19°C | 10°C | 4°C / 30°C | 73 mm | 77% | 11 km/h |
| June | 21°C | 12°C | 7°C / 33°C | 69 mm | 74% | 11 km/h |
| July | 25°C | 15°C | 10°C / 34°C | 32 mm | 73% | 11 km/h |
| August | 25°C | 15°C | 10°C / 35°C | 31 mm | 76% | 11 km/h |
| September | 21°C | 12°C | 5°C / 31°C | 82 mm | 82% | 10 km/h |
| October | 14°C | 8°C | -2°C / 24°C | 111 mm | 87% | 10 km/h |
| November | 10°C | 5°C | -28°C / 17°C | 126 mm | 87% | 12 km/h |
| December | 6°C | 3°C | -13°C / 15°C | 142 mm | 88% | 14 km/h |
Best time to visit Delta
The most comfortable time to visit Delta is generally June to August, balancing mild daytime temperatures against the driest stretch of the year. The city has a moderate seasonal swing and rain concentrates around March, totalling about 1116 mm a year.
Travellers who prefer heat should aim for August, when highs average 25°C. March is the month to avoid if rain would spoil your plans — it averages 154 mm, roughly 5× the rainfall of August.
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Delta forecast for what is happening now.