Chilly conditions break century-old temperature records in parts of southwest B.C.

Highways through southern British Columbia's mountain passes looked more like mid-winter than mid-May on Friday as Environment Canada advised another five centimetres of snow was expected before the latest unseasonable weather eased.

Special weather statements covered mountain passes along the Coquihalla Highway and Highway 3, as flurries added to the two to 10 centimetres dumped earlier in the week.

The weather office says 12 cold temperature records were tied or broken across the region on Thursday.

Records that have stood since 1911 were erased in Nanaimo and Port Alberni as temperatures couldn't edge past 9 C, while other record daytime lows were set in communities across Vancouver Island and the Sunshine Coast.

Environment Canada says Vancouver's daytime high of just 10.5 C on Thursday broke a 58-year-old record.

The chill was accompanied by heavy rain, including downpours that washed away long-standing rainfall records in five communities from Vancouver Island to the Sunshine Coast and north to the Cariboo.

Extended forecasts from the weather office show nippy conditions will continue throughout the next week over much of B.C., as most areas remain at least several degrees below normal daytime highs.