Observed at: St. Catharines / Niagara District Airport
Date: 3:00 PM EDT Friday 9 October 2026
Temp.: 18 °C
Wind: W 28 km/h
Humidity: 40 %
Dew point: 5 °C
Pressure: 102.1 kPa
Tendency: kPa
Visibility: km 		Sunrise: 7:23
Sunset: 18:45
Normals:
Max 16°C Min 7°C
 Extended Forecast - Environment Canada
Today
A mix of sun and cloud
A mix of sun and cloud
Max: 18°C
 Sat, 10 Oct
A mix of sun and cloud
A mix of sun and cloud
Max: 20°C
 Sun, 11 Oct
Periods of rain
Periods of rain
Max: 18°C
 Mon, 12 Oct
Cloudy
Cloudy
Max: 22°C
 Tue, 13 Oct
Chance of showers (40%)
Chance of showers
Max: 18°C
 Wed, 14 Oct
A mix of sun and cloud
A mix of sun and cloud
Max: 15°C
 Thu, 15 Oct
Chance of showers (40%)
Chance of showers
Max: 17°C
Tonight
Clear
Clear
Min: 6°C
 Night
Cloudy
Cloudy
Min: 14°C
 Night
Chance of showers (60%)
Chance of showers
Min: 13°C
 Night
Chance of showers (40%)
Chance of showers
Min: 12°C
 Night
Chance of showers (30%)
Chance of showers
Min: 8°C
 Night
Cloudy periods
Cloudy periods
Min: 6°C
  

Forecast

St. Catharines, ON (Issued: 11:00 AM EDT Friday 9 October 2026)

Today
Increasing cloudiness near noon. Wind northwest 30 km/h gusting to 50. High 18. UV index 4 or moderate.
Tonight
Clear. Low 6.
Sat, 10 Oct
A mix of sun and cloud. High 20. UV index 5 or moderate.
Night
Cloudy. Low 14.
Sun, 11 Oct
Periods of rain. High 18.
Night
Cloudy with 60 percent chance of showers. Low 13.
Mon, 12 Oct
Cloudy. High 22.
Night
Cloudy with 40 percent chance of showers. Low 12.
Tue, 13 Oct
Cloudy with 40 percent chance of showers. High 18.
Night
Cloudy periods with 30 percent chance of showers. Low 8.
Wed, 14 Oct
A mix of sun and cloud. High 15.
Night
Cloudy periods. Low 6.
Thu, 15 Oct
A mix of sun and cloud with 40 percent chance of showers. High 17.

24 Hour Forecast - St. Catharines, ON

Date/Time Temp.
(°C)
Weather Conditions
LOP †		 Wind
(km/h)
9 October 2026
4 PM 18 Mainly cloudy (20%)  Mainly cloudy 20 NW 30 gust 50
5 PM 18 A mix of sun and cloud (20%)  A mix of sun and cloud 20 NW 30 gust 50
6 PM 17 Sunny (0%)  Sunny 0 NW 15
7 PM 15 Clear (0%)  Clear 0 NW 15
8 PM 14 Clear (0%)  Clear 0 NW 15
9 PM 13 Clear (0%)  Clear 0 VR 5
10 PM 12 Clear (0%)  Clear 0 VR 5
11 PM 11 Clear (0%)  Clear 0 E 10
10 October 2026
12 AM 10 Clear (0%)  Clear 0 E 10
1 AM 8 Clear (0%)  Clear 0 E 10
2 AM 7 Clear (0%)  Clear 0 E 10
3 AM 7 Clear (0%)  Clear 0 E 10
4 AM 6 A few clouds (0%)  A few clouds 0 E 10
5 AM 6 Partly cloudy (0%)  Partly cloudy 0 E 10
6 AM 7 Partly cloudy (0%)  Partly cloudy 0 SE 10
7 AM 7 A mix of sun and cloud (0%)  A mix of sun and cloud 0 SE 10
8 AM 8 A mix of sun and cloud (0%)  A mix of sun and cloud 0 SE 10
9 AM 10 A mix of sun and cloud (0%)  A mix of sun and cloud 0 SE 10
10 AM 13 A mix of sun and cloud (0%)  A mix of sun and cloud 0 SE 10
11 AM 15 A mix of sun and cloud (0%)  A mix of sun and cloud 0 SE 15
12 PM 16 A mix of sun and cloud (0%)  A mix of sun and cloud 0 SE 15
1 PM 17 A mix of sun and cloud (0%)  A mix of sun and cloud 0 SE 15
2 PM 18 A mix of sun and cloud (0%)  A mix of sun and cloud 0 SE 15
3 PM 19 A mix of sun and cloud (0%)  A mix of sun and cloud 0 SE 15
 
† 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