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⚠Special Weather Statement ▶
4:04 a.m. EDT Saturday 18 April 2026

Rainfall expected today. The ground, already near saturation, has a limited capacity to absorb this rainfall.

What:
Rainfall amounts of 10 to 20 mm.

When:
This morning through this afternoon.

Additional information:
A cold front will sweep through the region today, bringing showers and the risk of a thunderstorm. Portions of the region have received significant rainfall amounts over the last few days. As a result, further rainfall could have significant impacts.

Water will likely pool on roads and in low-lying areas. Don't drive through flooded roadways. Avoid low-lying areas.

For information concerning flooding, please consult your local Conservation Authority or Ontario Ministry of Natural Resources office. Visit Ontario.ca/floods for the latest details.

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.

In effect for:
  • London - Parkhill - Eastern Middlesex County
Observed at: London Int'l Airport
Date: 10:00 AM EDT Saturday 18 April 2026
Mostly Cloudy
Mostly Cloudy 		Temp.: 17 °C
Wind: SSW 13 km/h
Humidity: 65 %
Dew point: 10 °C
Pressure: 100.4 kPa
Tendency: 0.25 kPa
Visibility: 24 km 		Sunrise: 6:39
Sunset: 20:11
Normals:
Max 13°C Min 3°C
 Extended Forecast - Environment Canada
Today
Showers
Showers
Max: 18°C
 Sun, 19 Apr
Chance of showers (60%)
Chance of showers
Max: 6°C
 Mon, 20 Apr
Chance of flurries (30%)
Chance of flurries
Max: 4°C
 Tue, 21 Apr
Chance of showers (30%)
Chance of showers
Max: 12°C
 Wed, 22 Apr
A mix of sun and cloud
A mix of sun and cloud
Max: 18°C
 Thu, 23 Apr
A mix of sun and cloud
A mix of sun and cloud
Max: 19°C
 Fri, 24 Apr
Cloudy
Cloudy
Max: 18°C
Tonight
Cloudy
Cloudy
Min: 2°C
 Night
Chance of rain showers or flurries (40%)
Chance of rain showers or flurries
Min: -5°C
 Night
Clear
Clear
Min: -4°C
 Night
Chance of showers (30%)
Chance of showers
Min: 6°C
 Night
Cloudy periods
Cloudy periods
Min: 6°C
 Night
Cloudy periods
Cloudy periods
Min: 8°C
  

Forecast

London, ON (Issued: 5:00 AM EDT Saturday 18 April 2026)

Today
Cloudy. Showers beginning early this morning and ending this afternoon. Risk of a thunderstorm. Local amount 10 to 15 mm. Wind south 30 km/h gusting to 50. High 18. UV index 3 or moderate.
Tonight
Cloudy. Wind northwest 30 km/h gusting to 50. Low plus 2.
Sun, 19 Apr
A mix of sun and cloud. 60 percent chance of showers in the afternoon. Wind west 30 km/h gusting to 50. High 6. UV index 5 or moderate.
Night
Cloudy periods with 40 percent chance of rain showers or flurries. Low minus 5.
Mon, 20 Apr
A mix of sun and cloud with 30 percent chance of flurries. High plus 4.
Night
Clear. Low minus 4.
Tue, 21 Apr
A mix of sun and cloud with 30 percent chance of showers. High 12.
Night
Cloudy periods with 30 percent chance of showers. Low 6.
Wed, 22 Apr
A mix of sun and cloud. High 18.
Night
Cloudy periods. Low 6.
Thu, 23 Apr
A mix of sun and cloud. High 19.
Night
Cloudy periods. Low 8.
Fri, 24 Apr
Cloudy. High 18.

24 Hour Forecast - London, ON

Date/Time Temp.
(°C)
Weather Conditions
LOP †		 Wind
(km/h)
18 April 2026
11 AM 18 Showers. Risk of thunderstorms (80%)  Showers. Risk of thunderstorms 80 S 30 gust 50
12 PM 18 Showers. Risk of thunderstorms (80%)  Showers. Risk of thunderstorms 80 SW 30 gust 50
1 PM 18 Showers. Risk of thunderstorms (80%)  Showers. Risk of thunderstorms 80 SW 30 gust 50
2 PM 18 Showers. Risk of thunderstorms (80%)  Showers. Risk of thunderstorms 80 SW 30 gust 50
3 PM 17 Showers. Risk of thunderstorms (80%)  Showers. Risk of thunderstorms 80 SW 30 gust 50
4 PM 17 Cloudy (20%)  Cloudy 20 SW 30 gust 50
5 PM 16 Overcast (20%)  Overcast 20 SW 30 gust 50
6 PM 14 Overcast (20%)  Overcast 20 NW 30 gust 50
7 PM 13 Cloudy (20%)  Cloudy 20 NW 30 gust 50
8 PM 11 Cloudy (20%)  Cloudy 20 NW 30 gust 50
9 PM 10 Cloudy (20%)  Cloudy 20 NW 30 gust 50
10 PM 8 Cloudy (20%)  Cloudy 20 NW 30 gust 50
11 PM 7 Cloudy (20%)  Cloudy 20 NW 30 gust 50
19 April 2026
12 AM 6 Cloudy (20%)  Cloudy 20 NW 30 gust 50
1 AM 4 Cloudy (20%)  Cloudy 20 NW 30 gust 50
2 AM 3 Cloudy (20%)  Cloudy 20 NW 30 gust 50
3 AM 3 Cloudy (20%)  Cloudy 20 NW 30 gust 50
4 AM 2 Mainly cloudy (20%)  Mainly cloudy 20 NW 30 gust 50
5 AM 2 Mainly cloudy (20%)  Mainly cloudy 20 NW 30 gust 50
6 AM 2 Mainly cloudy (20%)  Mainly cloudy 20 W 20
7 AM 2 Mainly cloudy (20%)  Mainly cloudy 20 W 20
8 AM 2 A mix of sun and cloud (20%)  A mix of sun and cloud 20 W 20
9 AM 2 Mainly sunny (20%)  Mainly sunny 20 W 20
10 AM 3 Mainly sunny (20%)  Mainly sunny 20 W 20
 
† 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