Frost advisory
Frost may damage some crops in frost-prone areas.
Temperatures are expected to drop to near zero degrees Celsius again tonight into early Friday morning.
Cover up plants, especially those in frost-prone areas. Take preventative measures to protect frost-sensitive plants and trees.
Frost advisories are issued when temperatures are expected to reach the freezing mark during the growing season, leading to potential damage and destruction to plants and crops.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm.
Today – October 9, 2025
Sunny. Becoming a mix of sun and cloud this afternoon. High 15. UV index 5 or moderate.
Tonight
A few clouds. Fog patches developing overnight. Low plus 2 with patchy frost.
Fri, 10 Oct – A mix of sun and cloud. Becoming sunny late in the morning. Fog patches dissipating in the morning. Wind becoming southwest 20 km/h gusting to 40 near noon. High 18. UV index 4 or moderate. Night – Cloudy periods with 40 percent chance of showers. Low 10.
Sat, 11 Oct – A mix of sun and cloud with 40 percent chance of showers. High 19. Night – Cloudy with 30 percent chance of showers. Low 13.
Sun, 12 Oct – A mix of sun and cloud with 30 percent chance of showers. High 20. Night – Cloudy periods with 30 percent chance of showers. Low 11.
Mon, 13 Oct – A mix of sun and cloud. High 21. Night – Cloudy periods. Low 11.
Tue, 14 Oct – A mix of sun and cloud. High 21. Night – Cloudy periods. Low 10.
Wed, 15 Oct – A mix of sun and cloud. High 19.
