⚠Yellow Advisory - Fog ▶
12:42 a.m. EDT Thursday 29 October 2026

Impact Level: Moderate

Forecast Confidence: High


Near-zero visibility in fog is expected.

Areas of dense fog will impact the area tonight into early Thursday morning. Particularly in fog prone areas along the 401 and 402.

Travel will likely be hazardous in some locations. Visibility will likely be suddenly reduced at times.

Be prepared for areas of near-zero visibility and allow extra time to reach your destination.

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:
  • London - Parkhill - Eastern Middlesex County

Observed at: London Int'l Airport
Date: 2:00 AM EDT Thursday 29 October 2026
Fog
Fog
Temp.: 8 °C
Wind: ENE 3 km/h
Humidity: 99 %
Dew point: 8 °C
Pressure: 102.1 kPa
Tendency: 0.13 kPa
Visibility: 0.8 km
Sunrise: 7:55
Sunset: 18:21
Normals:
Max 11°C Min 3°C
 Extended Forecast - Environment Canada
  Thu, 29 Oct
Chance of showers (60%)
Chance of showers
Max: 20°C
Fri, 30 Oct
Sunny
Sunny
Max: 13°C
Sat, 31 Oct
A mix of sun and cloud
A mix of sun and cloud
Max: 15°C
Sun, 1 Nov
Cloudy
Cloudy
Max: 17°C
Mon, 2 Nov
Cloudy
Cloudy
Max: 15°C
Tue, 3 Nov
Chance of showers (30%)
Chance of showers
Max: 16°C
Tonight
Clear
Clear
Min: 9°C
Night
Chance of showers (60%)
Chance of showers
Min: 6°C
Night
Clear
Clear
Min: 0°C
Night
Cloudy
Cloudy
Min: 6°C
Night
Cloudy
Cloudy
Min: 8°C
Night
Cloudy
Cloudy
Min: 8°C

Forecast

London, ON (Issued: 9:40 PM EDT Wednesday 28 October 2026)

Tonight
Clear. Fog patches developing after midnight. Low 9.
Thu, 29 Oct
Mainly sunny. Increasing cloudiness in the morning then 60 percent chance of showers late in the afternoon. Fog patches dissipating late in the morning. Wind becoming southwest 20 km/h gusting to 40 in the morning. High 20. UV index 3 or moderate.
Night
Mainly cloudy. 60 percent chance of showers in the evening. Wind becoming northwest 20 km/h near midnight. Low 6.
Fri, 30 Oct
Sunny. High 13.
Night
Clear. Low zero.
Sat, 31 Oct
A mix of sun and cloud. High 15.
Night
Cloudy. Low 6.
Sun, 1 Nov
Cloudy. High 17.
Night
Cloudy. Low 8.
Mon, 2 Nov
Cloudy. High 15.
Night
Cloudy. Low 8.
Tue, 3 Nov
Cloudy with 30 percent chance of showers. High 16.

24 Hour Forecast - London, ON

Date/Time Temp.
(°C)

Weather Conditions

LOP †
Wind
(km/h)
29 October 2026
3 AM 10 Clear (10%)  Clear 10 S 10
4 AM 9 Clear (10%)  Clear 10 S 10
5 AM 9 A few clouds (10%)  A few clouds 10 SW 10
6 AM 10 A few clouds (10%)  A few clouds 10 SW 10
7 AM 10 A few clouds (10%)  A few clouds 10 SW 10
8 AM 11 Mainly sunny (10%)  Mainly sunny 10 SW 20
9 AM 13 Mainly sunny (10%)  Mainly sunny 10 SW 20
10 AM 15 Mainly sunny (10%)  Mainly sunny 10 SW 20
11 AM 17 Mainly cloudy (10%)  Mainly cloudy 10 SW 20 gust 40
12 PM 18 Mainly cloudy (10%)  Mainly cloudy 10 SW 20 gust 40
1 PM 19 Mainly cloudy (10%)  Mainly cloudy 10 SW 20 gust 40
2 PM 20 Cloudy (10%)  Cloudy 10 SW 20 gust 40
3 PM 19 Chance of showers (60%)  Chance of showers 60 SW 20 gust 40
4 PM 18 Chance of showers (60%)  Chance of showers 60 SW 20 gust 40
5 PM 17 Chance of showers (60%)  Chance of showers 60 SW 15
6 PM 16 Chance of showers (60%)  Chance of showers 60 SW 15
7 PM 16 Chance of showers (60%)  Chance of showers 60 SW 15
8 PM 15 Chance of showers (60%)  Chance of showers 60 W 10
9 PM 15 Chance of showers (60%)  Chance of showers 60 W 10
10 PM 14 Chance of showers (60%)  Chance of showers 60 W 10
11 PM 14 Chance of showers (60%)  Chance of showers 60 NW 20
30 October 2026
12 AM 13 Partly cloudy (10%)  Partly cloudy 10 NW 20
1 AM 12 Partly cloudy (10%)  Partly cloudy 10 NW 20
2 AM 11 Mainly cloudy (10%)  Mainly cloudy 10 N 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%

Environment Canada