Keep your raincoats close, Toronto.

Heavy rain is expected to drench the GTA for the rest of the weekend, Environment Canada said Saturday.

As much as 25 to 40 mm of rain could fall on Toronto before Sunday night due to a weather system sweeping over Southern Ontario, Environment Canada said in a special weather statement.

With the rain will come wind, with Environment Canada forecasting gusts of up to 50 km/h starting Saturday night. Thunderstorms are also possible through Sunday.

Don’t bundle up too much, though. Temperatures will also rise as high as 16 C on Sunday.

By Monday, the system bringing the threat of heavy rain should have moved up into Quebec, according to Environment Canada, leaving Toronto workers’ morning commute hopefully dry.

However, temperatures will drop to 10 C during the day. Later this week, on Tuesday and Wednesday, the mercury may dip to -1 C overnight.

With files from Alexandra Jones

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