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Metro Vancouver's September forecast: Above average temps before rain returns

The start of the month looks hot, but the rest of the month looks wet.
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After the 2025 Labour Day Long weekend, the Metro Vancouver weather forecast includes above-average heat to start September, followed by the arrival of rainy days.

A wetter start to fall is likely in the cards for the Lower Mainland. 

Environment Canada Meteorologist Matt Loney tells V.I.A. that August has been wetter-than-average in Metro Vancouver, though the official August rainfall totals aren't released until the beginning of September. However, the unofficial ones show that it was one of the wettest in years, with over double the amount of rainfall in a experienced in a typical August.

"We have received 65.9 mm compared to the normal 36.1 mm, which makes it the 16th wettest August we've had since 1986," Loney explains. 

Aside from a few showers, the holiday weekend should include mostly hot and dry conditions, continuing a trend that has been in place for over 10 days.

The ridge is expected to start rebuilding heading into next week, with temperatures soaring 5 C to 8 C above the seasonal average on the coast and up to 10 C above it inland, Loney says. 

Temperatures up to 31 C are expected by Wednesday, Sept. 3, and temperatures should remain elevated until the weekend. 

"It looks like the end point of the ridge will be the beginning of next weekend. The temperatures are going to start lowering with an onshore flow," he describes.

Metro Vancouver weather forecast includes a wet signal for September 

The official fall forecast will be released on Tuesday, but the department expects to see a shift to wetter weather in Metro Vancouver starting in the second week of September. 

Loney adds that there is a 60 per cent chance the wetter trend will continue for the rest of the month. 

September temperatures are expected to be around average, meaning they may cool off in the second half following an unusually warm start to the month.


Stay up-to-date with hyperlocal forecasts across 50 neighbourhoods in the Lower Mainland with V.I.A.'s Weatherhood.

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