Forecast

2:57 p.m. EDT Saturday 17 October 2026

Impact Level: Moderate

Forecast Confidence: High

Patchy frost is expected tonight.

Temperatures are expected to fall to near the freezing mark for areas inland from the Great Lakes. Light to moderate southwesterly winds overnight may prevent frost formation in some areas.

Damage to plants, trees, and crops is possible.

Take preventative measures to protect cold-sensitive plants, trees, 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 social media using #ONStorm.

In effect for:

City of Toronto

Extended Forecast - Environment Canada
	Sun, 18 Oct Sunny Max: 16°C	Mon, 19 Oct Sunny Max: 18°C	Tue, 20 Oct Sunny Max: 17°C	Wed, 21 Oct Sunny Max: 14°C	Thu, 22 Oct A mix of sun and cloud Max: 14°C	Fri, 23 Oct A mix of sun and cloud Max: 14°C
Tonight Clear Min: 2°C	Night Clear Min: 5°C	Night Clear Min: 7°C	Night Clear Min: 1°C	Night Clear Min: 6°C	Night Cloudy periods Min: 5°C

Toronto, ON (Issued: 3:30 PM EDT Saturday 17 October 2026)

Tonight: Clear. Low plus 2 with risk of frost.
Sun, 18 Oct: Sunny. Wind becoming southwest 20 km/h gusting to 40 in the morning. High 16. UV index 4 or moderate.
Night: Clear. Low plus 5.
Mon, 19 Oct: Sunny. High 18.
Night: Clear. Low 7.
Tue, 20 Oct: Sunny. High 17.
Night: Clear. Low plus 1.
Wed, 21 Oct: Sunny. High 14.
Night: Clear. Low 6.
Thu, 22 Oct: A mix of sun and cloud. High 14.
Night: Cloudy periods. Low plus 5.
Fri, 23 Oct: A mix of sun and cloud. High 14.

24 Hour Forecast - Toronto, ON

Date/Time	Temp. (°C)	Weather Conditions	LOP †	Wind (km/h)
17 October 2026
8 PM	7	Clear	0	SW 10
9 PM	6	Clear	0	SW 10
10 PM	4	Clear	0	SW 10
11 PM	3	Clear	0	SW 10
18 October 2026
12 AM	3	Clear	0	SW 10
1 AM	2	Clear	0	SW 10
2 AM	2	Clear	0	SW 10
3 AM	2	Clear	0	SW 10
4 AM	2	Clear	0	SW 10
5 AM	2	Clear	0	SW 10
6 AM	2	Clear	0	SW 10
7 AM	2	Clear	0	SW 10
8 AM	2	Sunny	0	SW 10
9 AM	3	Sunny	0	SW 20
10 AM	5	Sunny	0	SW 20
11 AM	6	Sunny	0	SW 20
12 PM	8	Sunny	0	SW 20 gust 40
1 PM	11	Sunny	0	SW 20 gust 40
2 PM	13	Sunny	0	SW 20 gust 40
3 PM	14	Sunny	0	SW 20 gust 40
4 PM	15	Sunny	0	SW 20 gust 40
5 PM	16	Sunny	0	SW 20 gust 40
6 PM	15	Clear	0	SW 10
7 PM	15	Clear	0	SW 10

† Likelihood of Precipitation (LOP) as described in the public forecast as a chance of measurable precipitation for a period of time. Nil: 0% Low: 40% or below Medium: 60% or 70% High: Above 70%