First Frost 2024 Southern Ontario Time

First Frost 2024 Southern Ontario Time. Use this mapping tool to find the average of first and last frost date in your city or state by zip code to make sure you start your garden at the right time, not too early, not too late. Many locations are actually a few days behind their average first frost.

314 rows plantmaps has derived zones indicating the interactive map of average annual last frost dates for the province of ontario Our frost date calculator will tell you precisely when your garden is at risk for frost.