First Frost 2024 Southern Ontario Canada. Plantmaps also created maps for. However, this doesn’t mean that winter weather will wait until this date to make itself known.

Use our 2024 frost dates calculator to find the average dates of the last light freeze of spring and the first light freeze of fall for locations across the. We’ve created average first frost dates, average last frost dates and average number of days with frost maps for most us states and candian provinces.