Summer officially arrives in just over two weeks, but that may be little comfort to people in the Southern Interior of B.C. this weekend.

Environment Canada reports an unseasonably cool weather system is bearing down on the southern half of the province, and will bring a mix of rain and snow to the region, including Highway 97C, the Okanagan Connector.

Environment Canada's media office has issued a release saying the white stuff is due late Thursday or early Friday.

A minimum of several centimetres of snow could also fall on Allison Pass, through Manning Park and on the Kootenay Pass, further east on Highway 3.

Freezing levels are predicted to drop as low as 1,200 metres in the southwest Interior region and 1,500 metres in the Columbia Kootenay as the system travels through.

Nationally, Environment Canada is predicting the exceptionally cold and snowy weather will be followed by a hot, sweaty summer from coast to coast.

If the national forecast for June, July and August is proved correct, it would be the 19th summer of the last 25 to feature higher-than-average temperatures, Environment Canada senior climatologist David Phillips said Wednesday.