Michel Gelinas, (MICHELLE JELL-in-UH) a meteorologist with the agency, says records were broken by about 1.3 C on average in Lytton, Pemberton, Lillooet and Kamloops.
The average high temperature in each community was about 40.5 C.
Gelinas says more records could be broken as more results come in.
Environment Canada forecast record-breaking temperatures in the south coast of the province this weekend, with the northern half of B.C. expected to break records in the coming days.