This year stands out: on November 9 2025, Toronto recorded about 10 cm of snow, marking the city’s earliest major November snowfall in more than two decades of data.

Looking at daily snowfall records from 2000 to 2025, Toronto’s first 5-centimetre-or-greater snowfall typically arrives around November 18. The timing shifts widely from year to year — as late as November 28 in 2021 and as early as November 11 in 2019.

I made a heatmap table showing the amount of snowfall in cm that Toronto recorded each day of November, for the past 25 years.

The table was created using Datawrapper and cleaned up in Figma for clarity and annotations. The dataset is courtesy of the Canadian Centre for Climate Services.