Observed at: London Int'l Airport
Date: 4:00 AM EDT Saturday 13 September 2025
Mostly Cloudy
Mostly Cloudy
Temp.: 13 °C
Wind: N 2 km/h
Humidity: 97 %
Dew point: 12 °C
Pressure: 102.1 kPa
Tendency: 0.08 kPa
Visibility: 24 km
Sunrise: 7:02
Sunset: 19:39
Normals:
Max 22°C Min 11°C
 Extended Forecast - Environment Canada
  Sat, 13 Sep
Chance of showers (30%)
Chance of showers
Max: 25°C
Sun, 14 Sep
Sunny
Sunny
Max: 27°C
Mon, 15 Sep
Sunny
Sunny
Max: 28°C
Tue, 16 Sep
Sunny
Sunny
Max: 29°C
Wed, 17 Sep
A mix of sun and cloud
A mix of sun and cloud
Max: 27°C
Thu, 18 Sep
A mix of sun and cloud
A mix of sun and cloud
Max: 28°C
Tonight
A few clouds
A few clouds
Min: 11°C
Night
Chance of showers (30%)
Chance of showers
Min: 12°C
Night
Clear
Clear
Min: 13°C
Night
Clear
Clear
Min: 12°C
Night
Clear
Clear
Min: 12°C
Night
Cloudy periods
Cloudy periods
Min: 14°C

Forecast

London, ON (Issued: 3:30 PM EDT Friday 12 September 2025)

Tonight
A few clouds. Increasing cloudiness overnight. Fog patches developing overnight. Low 11.
Sat, 13 Sep
Cloudy. Becoming a mix of sun and cloud in the afternoon with 30 percent chance of showers later in the afternoon. Fog patches dissipating in the morning. High 25. Humidex 28. UV index 6 or high.
Night
Partly cloudy. 30 percent chance of showers early in the evening. Low 12.
Sun, 14 Sep
Sunny. High 27.
Night
Clear. Low 13.
Mon, 15 Sep
Sunny. High 28.
Night
Clear. Low 12.
Tue, 16 Sep
Sunny. High 29.
Night
Clear. Low 12.
Wed, 17 Sep
A mix of sun and cloud. High 27.
Night
Cloudy periods. Low 14.
Thu, 18 Sep
A mix of sun and cloud. High 28.

24 Hour Forecast - London, ON

Date/Time Temp.
(°C)

Weather Conditions

LOP †
Wind
(km/h)
13 September 2025
5 AM 11 Mainly cloudy (0%)  Mainly cloudy 0 VR 5
6 AM 12 Mainly cloudy (0%)  Mainly cloudy 0 VR 5
7 AM 13 Mainly cloudy (0%)  Mainly cloudy 0 VR 5
8 AM 14 Cloudy (20%)  Cloudy 20 VR 5
9 AM 17 Cloudy (20%)  Cloudy 20 VR 5
10 AM 19 Cloudy (20%)  Cloudy 20 VR 5
11 AM 22 Cloudy (20%)  Cloudy 20 VR 5
12 PM 23 Cloudy (20%)  Cloudy 20 VR 5
1 PM 23 Mainly cloudy (20%)  Mainly cloudy 20 VR 5
2 PM 24 Chance of showers (30%)  Chance of showers 30 SW 10
3 PM 24 Chance of showers (30%)  Chance of showers 30 SW 10
4 PM 25 Chance of showers (30%)  Chance of showers 30 SW 10
5 PM 25 Chance of showers (30%)  Chance of showers 30 VR 5
6 PM 23 Chance of showers (30%)  Chance of showers 30 VR 5
7 PM 21 Chance of showers (30%)  Chance of showers 30 VR 5
8 PM 19 Chance of showers (30%)  Chance of showers 30 VR 5
9 PM 18 Clear (20%)  Clear 20 VR 5
10 PM 17 Clear (20%)  Clear 20 VR 5
11 PM 16 A few clouds (20%)  A few clouds 20 VR 5
14 September 2025
12 AM 15 A few clouds (20%)  A few clouds 20 VR 5
1 AM 14 Partly cloudy (20%)  Partly cloudy 20 VR 5
2 AM 13 Mainly cloudy (20%)  Mainly cloudy 20 VR 5
3 AM 13 Cloudy (20%)  Cloudy 20 VR 5
4 AM 12 Cloudy (20%)  Cloudy 20 VR 5
 
† 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