Last Frost Date 2025 Ontario

Last Frost Date 2025 Ontario. Use our 2025 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 u.s. The last frost date in particular is an indicator for when annual plants can go outside in your areas.

Frost dates are arranged by region and include the first frost date of the season and the final frost date of the season. Northern ontario will typically see the last frost around the first to second week of june.