In 2025, Canada will celebrate 50 years since adopting Celsius for weather reporting, a milestone in the country’s shift to the metric system. The change officially began on April 1, 1975, with Celsius replacing Fahrenheit as the standard temperature scale.
Initially, the transition was gradual. Broadcasters and media outlets reported both Celsius and Fahrenheit to help Canadians adjust to the new measurements. By 1977, however, major networks fully embraced Celsius, marking the completion of the conversion in weather reporting.
The switch to Celsius was part of a broader national effort to adopt the metric system, aligning Canada with global standards. The move symbolised progress and modernisation, though it met some resistance from those accustomed to the Imperial system.
Today, Celsius is a natural part of Canadian life, from weather forecasts to classroom lessons. Reflecting on this 50-year milestone highlights the success of the metrication initiative and Canada’s ability to adapt to change.
“This anniversary is a reminder of how far we’ve come in standardising measurements,” says historian Dr. Marie Langley. “It’s fascinating to see how quickly Celsius became part of the Canadian identity.”
As Canada reflects on 50 years of Celsius, the milestone underscores the importance of adaptability and global connection.
(Written by Joseph Goden with files from Matt Leblanc)