Observed at: St. Catharines / Niagara District Airport
Date: 1:00 PM EDT Monday 13 October 2025
Mostly Cloudy
Mostly Cloudy 		Temp.: 17 °C
Wind: E 15 km/h
Humidity: 72 %
Dew point: 12 °C
Pressure: 102.1 kPa
Tendency: 0.07 kPa
Visibility: 48 km 		Sunrise: 7:28
Sunset: 18:38
Normals:
Max 15°C Min 7°C
 Extended Forecast - Environment Canada
Today
Cloudy
Cloudy
Max: 18°C
 Tue, 14 Oct
A mix of sun and cloud
A mix of sun and cloud
Max: 20°C
 Wed, 15 Oct
Sunny
Sunny
Max: 13°C
 Thu, 16 Oct
Sunny
Sunny
Max: 14°C
 Fri, 17 Oct
A mix of sun and cloud
A mix of sun and cloud
Max: 15°C
 Sat, 18 Oct
Cloudy
Cloudy
Max: 17°C
 Sun, 19 Oct
Chance of showers (60%)
Chance of showers
Max: 16°C
Tonight
Mainly cloudy
Mainly cloudy
Min: 8°C
 Night
Clear
Clear
Min: 11°C
 Night
Clear
Clear
Min: 5°C
 Night
Clear
Clear
Min: 5°C
 Night
Chance of showers (40%)
Chance of showers
Min: 11°C
 Night
Chance of showers (40%)
Chance of showers
Min: 13°C
  

Forecast

St. Catharines, ON (Issued: 11:00 AM EDT Monday 13 October 2025)

Today
Cloudy. Wind northeast 20 km/h. High 18. UV index 4 or moderate.
Tonight
Mainly cloudy. Fog patches developing after midnight. Low 8.
Tue, 14 Oct
A mix of sun and cloud. Fog patches dissipating in the morning. High 20. UV index 4 or moderate.
Night
Clear. Low 11.
Wed, 15 Oct
Sunny. High 13.
Night
Clear. Low plus 5.
Thu, 16 Oct
Sunny. High 14.
Night
Clear. Low plus 5.
Fri, 17 Oct
Cloudy. High 15.
Night
Cloudy with 40 percent chance of showers. Low 11.
Sat, 18 Oct
Cloudy. High 17.
Night
Cloudy with 40 percent chance of showers. Low 13.
Sun, 19 Oct
Cloudy with 60 percent chance of showers. High 16.

24 Hour Forecast - St. Catharines, ON

Date/Time Temp.
(°C)
Weather Conditions
LOP †		 Wind
(km/h)
13 October 2025
2 PM 18 Cloudy (10%)  Cloudy 10 NE 20
3 PM 18 Cloudy (10%)  Cloudy 10 NE 20
4 PM 18 Cloudy (10%)  Cloudy 10 NE 20
5 PM 18 Mainly cloudy (10%)  Mainly cloudy 10 NE 20
6 PM 17 Mainly cloudy (10%)  Mainly cloudy 10 NE 15
7 PM 16 Mainly cloudy (10%)  Mainly cloudy 10 NE 15
8 PM 15 Partly cloudy (10%)  Partly cloudy 10 NE 15
9 PM 14 Partly cloudy (10%)  Partly cloudy 10 NE 15
10 PM 12 Mainly cloudy (10%)  Mainly cloudy 10 NE 15
11 PM 11 Mainly cloudy (10%)  Mainly cloudy 10 NE 15
14 October 2025
12 AM 10 Mainly cloudy (10%)  Mainly cloudy 10 VR 5
1 AM 10 Mainly cloudy (10%)  Mainly cloudy 10 VR 5
2 AM 9 Partly cloudy (10%)  Partly cloudy 10 VR 5
3 AM 9 Partly cloudy (10%)  Partly cloudy 10 VR 5
4 AM 8 Partly cloudy (10%)  Partly cloudy 10 VR 5
5 AM 8 Partly cloudy (10%)  Partly cloudy 10 VR 5
6 AM 8 Partly cloudy (10%)  Partly cloudy 10 VR 5
7 AM 9 Partly cloudy (10%)  Partly cloudy 10 VR 5
8 AM 9 A mix of sun and cloud (10%)  A mix of sun and cloud 10 VR 5
9 AM 11 A mix of sun and cloud (10%)  A mix of sun and cloud 10 NW 10
10 AM 12 A mix of sun and cloud (10%)  A mix of sun and cloud 10 NW 10
11 AM 14 Mainly sunny (10%)  Mainly sunny 10 NW 10
12 PM 15 Sunny (0%)  Sunny 0 NW 15
1 PM 17 Mainly sunny (0%)  Mainly sunny 0 NW 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